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Chapter 1 — GENERAL CODE PROVISIONS

California Mechanical Code (Title 24, Part 4) · 2019 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

(Matrix Adoption Tables are non-regulatory, intended only as an aid to the user. See Chapter 1 for state agency authority and building application.)

Adopting Agency BSC BSC-
CG
SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
Adopting Agency
**BSC ** BSC-
CG
SFM
1 2 **1-AC ** **AC ** SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
Adopt Entire Chapter
X

Adopt Entire Chapter as
amended (amended sections
listed below)
S A M P L E

Adopt only those sections
that are listed below

Chapter/Section


If there is an “X” under a particular state agency’s acronym in this row, it means that a particular state agency has adopted the entire model code chapter, with state amendments.

Each state-amended section that the agency has added to that particular chapter is listed. There will be an “X” in the column, by that particular section, under the agency’s acronym, as well as an “X” by each section that the agency has adopted.

Example:

Each state-amended section that the agency has added to that particular chapter is listed. There will be an “X” in the column, by that particular section, under the agency’s acronym, as well as an “X” by each section that the agency has adopted.

CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

CHAPTER 1 - GENERAL CODE PROVISIONS (Matrix Adoption Tables are non-regulatory, intended only as an aid to the user. See Chapter 1 for state agency authority and building application.)

Adopting Agency BSC BSC-
CG
SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
Adopting Agency
**BSC ** BSC-
CG
SFM 1 2 **1-AC ** **AC ** SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
Adopt Entire Chapter

Adopt Entire Chapter as
amended (amended sections
listed below)
X X S A M P L E

Adopt only those sections
that are listed below

Chapter/Section

2019 CALIFORNIA MECHANICAL CODE vii

Adopt only those sections which are listed below: If there is an “X” under a particular state agency’s acronym in this row, it means that particular state agency is adopting only specific model code or state-amended sections within this chapter. There will be an “X” in the column under the agency’s acronym, as well as an “X” by each section that the agency has adopted.

Example:

CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

CHAPTER 1 - GENERAL CODE PROVISIONS (Matrix Adoption Tables are non-regulatory, intended only as an aid to the user. See Chapter 1 for state agency authority and building application.)

Adopting Agency BSC BSC-
CG
SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
Adopting Agency
**BSC ** BSC-
CG
SFM 1 2 **1-AC ** **AC ** SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
Adopt Entire Chapter

Adopt Entire Chapter as
amended (amended sections
listed below)
S A M P L E

Adopt only those sections
that are listed below
X

Chapter/Section

viii 2019 CALIFORNIA MECHANICAL CODE

HOW TO DISTINGUISH MODEL CODE LANGUAGE

FROM CALIFORNIA AMENDMENTS

To distinguish between model code language and incorporated California Amendments, including exclusive California standards, California amendments will appear in italics font print.

Symbols in the margins indicate the status of code changes as follows:

[BSC]

>

This symbol identifies which State agency(s) by its “acronym” that has amended a section of the model code. For a complete listing of State agency acronyms, see the Application Section within Chapter 1, Division I.

This symbol indicates that a change has been made to a California amendment.

This symbol indicates that a section, paragraph, or table has been revised or relocated within IAPMO model code language.

This symbol indicates deletion of California language.

This symbol indicates where an entire section, paragraph, or table has been deleted from IAPMO model code language.

Revision Markings A double right angle ( « ) in the margin indicates that the text or a table has been relocated within the code. The table found on page xiii points out the relocations in the 2018 edition of the Uniform Mechanical Code.

TIA TIA TIA TIA

TIA indicates that the revision is the result of a Tentative Interim Amendment. For further information on tentative interim amendments see Section 5 of the IAPMO Regulations Governing Committee Projects available at http://codes.iapmo.org/

A reference in brackets [ ] following a section or paragraph indicates material that has been extracted from another document. This reprinted material is not the complete and official position of the source document on the referenced subject that is represented by the standard in its entirety. Material contained in this document that is taken or extracted from NFPA standards is used with permission of the National Fire Protection Association. This material is not the complete and official position of the NFPA on the reference subject, which is represented solely by the relevant standard in its entirety. NFPA standards can be accessed at www.nfpa.org. In addition, this extracted material may include revisions or modifications developed through IAPMO’s standards development process. Therefore, NFPA disclaims responsibility for the content of this Code.

Text that is extracted pursuant to IAPMO’s Extract Guidelines, but outside of the regular revision process is denoted with the use of the source document in the margin. This text is not fully processed by IAPMO in accordance with ANSI’s public announcement consensus requirements for an American National Standard (ANS) nor approved by ANSI’s Board of Standards Review. The next revision cycle processes such text in accordance with those requirements.

2019 CALIFORNIA MECHANICAL CODE ix

Important Notices and Disclaimers The 2018 edition of the Uniform Mechanical Code is developed through a consensus standards development process approved by the American National Standards Institute. This process brings together volunteers representing varied viewpoints and interests to achieve consensus on mechanical issues. While the International Association of Plumbing and Mechanical Officials (IAPMO) administers the process and establishes rules to promote fairness in the development of consensus, it does not independently test, evaluate, or verify the accuracy of any information or the soundness of any judgments contained in its codes and standards.

IAPMO disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, or reliance on this document. IAPMO also makes no guarantee or warranty as to the accuracy or completeness of any information published herein.

In issuing and making this document available, IAPMO is not undertaking to render professional or other services for or on behalf of any person or entity. Nor is IAPMO undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances.

dertaking to render professional or other services for or on behalf of any person or entity. Nor is IAPMO undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances.

Updating IAPMO Codes Users of IAPMO codes should be aware that IAPMO codes may be amended from time to time through the issuance of Tentative Interim Amendments or corrected by Errata. IAPMO codes consist of the current edition of the document together with any Tentative Interim Amendment and any Errata in effect.

In order to determine whether an IAPMO code has been amended through the issuance of Tentative Interim Amendments or corrected by Errata, please visit the IAPMO Group codes information pages on IAPMO’s website (www.iapmo.org). The codes information pages provide a list of IAPMO codes with up-to-date specific information including any issued Tentative Interim Amendments and Errata.

To access the code information pages for a specific code, go to http://codes.iapmo.org to select from the list of IAPMO codes. For Tentative Interim Amendments, go to the standard council decisions. For Errata, select the archived revision information.

x 2019 CALIFORNIA MECHANICAL CODE

FOREWORD

Origin and Development The industry has long recognized the advantages of a statewide adopted mechanical code. The first edition of the Uniform Mechanical Code ® (UMC ® ) was adopted by IAPMO in 1967. The widespread use of this code over the past five decades by jurisdictions throughout the United States and internationally is testament to its merit.

Publishing the 2003 Uniform Mechanical Code, is a significant milestone because it is the first time in the history of the United States, a mechanical code was developed through a true consensus process. The 2018 edition represents the most current approaches in the mechanical field and is the sixth edition developed under the ANSI consensus process. Contributions to the content of this code consists of diverse interests as consumers, enforcing authorities, installers/maintainers, labor, manufacturers, research/standards/testing laboratories, special experts, and users.

The Uniform Mechanical Code provides consumers with complete requirements for the installation and maintenance of heating, ventilating, cooling, and refrigeration systems, while, at the same time, allowing latitude for innovation and new technologies. The public at large is invited and encouraged to take part in IAPMO’s open consensus code development process. This code is updated every three years. The Uniform Mechanical Code is dedicated to all those who in working to achieve “the ultimate mechanical code” have unselfishly devoted their time, effort, and personal funds to create and maintain this, the finest mechanical code in existence today.

The Uniform Mechanical Code updates every three years in revision cycles that begin twice each year that takes two years to complete.

Each revision cycle advances according to a published schedule that includes final dates for all major events and contains four basic steps as follows:

  1. Public and Committee Proposal Stage;
  2. Comment Stage;
  3. Association Technical Meeting;
  4. Council Appeals and Issuance of Code.

IAPMO develops “full consensus” codes built on a foundation of maximum participation and agreement by a broad range of interests. This philosophy has led to producing technically sound codes that promote health and safety, yet do not stifle design or development.

It is important to stress that, the process remains committed to the principles of consensus code development where consensus Technical Committees and Correlating Committees revise codes. The public and membership is offered multiple opportunities to debate, provide input and raise concerns through Amending Motions at the annual Assembly Consideration Session. Anyone may submit an appeal related to the issuance of a document through the IAPMO Standards Council.

The 2018 Uniform Mechanical Code is supported by the Mechanical Contractors Association of America (MCAA), the Plumbing-Heating-Cooling Contractors National Association (PHCC-NA), the United Association (UA), and the World Plumbing Council (WPC). The presence of these logos, while reflecting support, does not imply any ownership of the copyright to the UMC, which is held exclusively by IAPMO. Further, the logos of these associations indicate the support of IAPMO’s open consensus process being used to develop IAPMO’s codes and standards.

2019 CALIFORNIA MECHANICAL CODE

xi

FORMAT OF THE UNIFORM MECHANICAL CODE

The format of the Uniform Mechanical Code (UMC) arranges each chapter in accordance with a specific subject matter. However, Chapter 3 is dedicated to general requirements that are applicable to every chapter. The subject matters are divided as follows:

CHAPTERS SUBJECTS
1 Administration
2 Definitions
3 General Regulations
4 Ventilation Air
5 Exhaust Systems
6 Duct Systems
7 Combustion Air
8 Chimneys and Vents
9 Installation of Specific Appliances
10 Boilers and Pressure Vessels
11 Refrigeration
12 Hydronics
13 Fuel Gas Piping
14 Process Piping
15 Solar Energy Systems
16 Stationary Power Plants
17 Referenced Standards
Appendix A Residential Plan Examiner Review
Form for HVAC System Design
Appendix B Procedures to be Followed to Place
Gas Equipment in Operation
Appendix C Installation and Testing of Oil (Liquid)
Fuel-Fired Equipment
Appendix D Fuel Supply: Manufactured/Mobile
Home Parks and Recreational Vehicle
Parks
Appendix E Sustainable Practices
Appendix F Sizing of Venting Systems and Outdoor
Combustion and Ventilation Opening
Design
Appendix G Example Calculation of Outdoor Air
Rate

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FORMAT OF THE UNIFORM MECHANICAL CODE

The following is a summary of the scope and intent of the provisions addressed within the chapters and appendices of the Uniform Mechanical Code:

Chapter 1 Administration. Chapter 1 regulates the application, enforcement, and administration of subsequent requirements of the code. As well as establishing the scope of the code, this chapter is concerned with enforcing the requirements contained in the body of the code. A mechanical code, as with any other code, is intended to be adopted as a legally enforceable document to safeguard health, safety, property and public welfare. The code cannot be effective without satisfactory provisions for its administration and enforcement. The Authority Having Jurisdiction is to review the proposed and completed work and to decide whether a mechanical system conforms to the code requirements. As a public servant, the Authority Having Jurisdiction enforces the code in an unbiased, proper manner. The design professional is responsible for the design of a safe mechanical system. The contractor is responsible for installing the system in accordance with the plans.

Chapter 2 Definitions. To maintain consistency and encourage the use of common terminology, Chapter 2 establishes definitions to provide clarity of terms and promote the use of a common language throughout the code. Understanding definitions within the context of their application enables greater collaboration, efficiency, standardization and interpretation in applying and enforcing terms used throughout the code. Codes are technical documents, and every term can impact the meaning of the code text. Terms not defined have a normally accepted meaning.

Chapter 3 General Regulations. Chapter 3 regulates the general requirements, not specific to other chapters, for installing mechanical systems. Many regulations are not specific mechanical requirements, but relate to the overall mechanical system. This chapter contains safety requirements for appliance location and installation, appliance and system access, condensate disposal, and clearances to combustibles, and return or outside air used in mechanical systems. Listing method of approval, based on applicable nationally recognized standards, for the safe and proper installation of mechanical systems is essential to ensure protection of public health, safety, and welfare. The safety requirements provide protection for piping, material, and structures, with provisions for installation practices, removing stress and strain of the pipe, sleeving, and hanger support. The building’s structural stability is protected by the regulations for cutting and notching of structural members.

chanical systems is essential to ensure protection of public health, safety, and welfare. The safety requirements provide protection for piping, material, and structures, with provisions for installation practices, removing stress and strain of the pipe, sleeving, and hanger support. The building’s structural stability is protected by the regulations for cutting and notching of structural members.

Chapter 4 Ventilation Air. Chapter 4 regulates the minimum requirements for ventilation air supply, exhaust, and makeup air for spaces within a building. Building ventilation is one important factor affecting the relationship between airborne transmission of respiratory infections and the health and productivity of workers. Ventilation air may be composed of mechanical or natural ventilation, infiltration, recirculated air, transfer air, or a suitable combination of that. Providing a comfortable and healthy indoor environment for building occupants is of primary concern. When considering how much ventilation should be supplied, typical and unusual significant sources of indoor pollution need to be controlled. Areas such as kitchens, bathrooms, and laundries are all built to allow specific functions. These spaces produce pollutants such as moisture, odors, volatile organic compounds, particles, or combustion byproducts. The purpose of local exhaust is to control concentrates of these pollutants in the room into which they were emitted in and to reduce the spread of the pollutants into other parts of the occupancy. Local exhaust ventilation is the source control for pollution that is expected in certain rooms. Using local exhaust to extract contaminants before they can mix with the indoor environment is essential.

Chapter 5 Exhaust Systems. Chapter 5 regulates the minimum requirements for exhaust systems. Chapter 5 contains two parts: part I provides exhaust requirements for environmental air ducts and product conveying ducts; part II provides exhaust requirements for commercial kitchens. Environmental air ducts include exhaust ducts used for transporting the air from domestic kitchens, bathrooms, and clothes dryers. Systems that carry nonabrasive exhaust, such as smoke, moderately abrasives such as sawdust, and high abrasives such as manganese or acid vapors use product-conveying ducts. Part II provides the minimum fire safety requirements related to the design, installation, inspection, and maintenance of grease-type operations, such as cooking, for both fuel-gas and solid fuel. Cooking produces a significant amount of smoke, fumes, vapors, heat, and other pollutants. Therefore, acceptable kitchen ventilation is necessary to provide the occupants protection from smoke, unpleasant odors, pollutants, dangerous gases, and to prevent fires from the build-up of grease. There are two types of exhaust hoods (Type I and Type II) used in commercial kitchen applications. Type I hoods are intended to be installed above equipment or

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FORMAT OF THE UNIFORM MECHANICAL CODE

appliances that generate grease or smoke. Type II hoods are intended to be installed above equipment or dishwashers that generate steam, heat, or products of combustion, or where grease or smoke is not present. Type II hood exhaust system requirements are addressed in Section 519.0.

Chapter 6 Duct Systems. Chapter 6 regulates requirements for ducts and plenums that are portions of a heating, cooling, absorption or evaporative cooling, or exhaust system. This chapter contains material and installation requirements for metal, gypsum, factory-made, flexible, and plastic ducts. It also contains fire protection requirements, smoke dampers, and automatic shutoff for the building’s air distribution system.

Chapter 7 Combustion Air. Chapter 7 regulates combustion air requirements for the ventilation and dilution of flue gases for appliances installed in buildings. It applies to fuel-gas appliances except for direct vent appliances and clothes dryers. Chapter 5 provides makeup air for clothes dryers. Chapter 7 provides acceptable methods for supplying satisfactory combustion air to ensure proper combustion. Combustion air can be supplied by using indoor combustion air or by introducing the air from the outdoors.

Combustion is the rapid oxidation of fuel to release energy. The oxygen required to release the energy from the fuel normally comes from the air. Incomplete combustion of fuel occurs when inadequate oxygen is provided to the appliance. Combustion is needed to provide ventilation cooling for the casing and internal controls. When a lack of oxygen occurs, some of the carbon is not oxidized, and carbon monoxide forms.

Chapter 8 Chimneys and Vents. Chapter 8 regulates the installation, design, and construction of venting systems for fuel-burning appliances. The provisions addressed within this chapter follow procedures an installer would use to design or evaluate a venting system. Many requirements apply to the design and construction of venting systems, chimneys, installation of gas vents, and the sizing of venting system for a Category I appliance. Sizing venting systems require rigorous engineering calculations. However, the venting sizing requirements and sizing tables in this chapter already perform the calculations for the benefit of the end user.

Combustion appliances produce products of incomplete combustion, including potentially harmful carbon monoxide (CO). It is desirable to vent these products to the outdoors. Although the gas is clean-burning fuel, the products of combustion must not be allowed to collect within a building.

Chapter 9 Installation of Specific Appliances. Chapter 9 regulates the minimum requirements for the design, construction and installation of specific appliances. The provisions address the minimum requirements for gas-fired appliances, oil-fired appliances, wood-fired appliances, and electric-type appliances. In addition to the requirements of this chapter, appliances are also required to comply with the general requirements of Chapter 3.

s.** Chapter 9 regulates the minimum requirements for the design, construction and installation of specific appliances. The provisions address the minimum requirements for gas-fired appliances, oil-fired appliances, wood-fired appliances, and electric-type appliances. In addition to the requirements of this chapter, appliances are also required to comply with the general requirements of Chapter 3.

Chapter 10 Boilers and Pressure Vessels. Chapter 10 regulates the construction, installation, operation, repair, and alteration of boilers and pressure vessels. A lowpressure boiler provides steam at a pressure that does not exceed 15 psig, a gauge pressure more than 160 psi (1103 kPa) or heats water to a temperature more than 250°F (121°C). Potable water heaters are free from the requirements of Chapter 10 as they are within the scope of the Uniform Plumbing Code (UPC).

Pressure vessels store large amounts of energy and must comply with ASME Boiler and Pressure Vessel Code (BPVC) Section VIII. The stored energy must be contained to prevent disastrous failures. Boilers must comply with ASME BPVC Section I, ASME BPVC Section IV, or NFPA 85. Installing a safety relief valve and expansion tank prevents pressures in the tank from exceeding the design threshold.

Chapter 11 Refrigeration. Chapter 11 regulates the design, installation, and construction requirements of refrigeration systems and the installation and construction of cooling towers. Refrigeration is a method used for achieving heat transfer to cool spaces. Refrigerants are the most common medium used to transfer the heat energy from the low-temperature level to the high-temperature level. Table 1102.3 lists the most commonly used refrigerants and is labeled by a number. The concentration limits provided in Table 1102.3 are useful for the quantity of refrigerant required to cool a volume of space safely.

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FORMAT OF THE UNIFORM MECHANICAL CODE

A major milestone reached in the industry was the introduction of lower flammability refrigerants such as A2L and B2L. The industry’s concerns to address lower Global Warming Potential (GWP) refrigerants led to the development of these lower flammability refrigerants. Chapter 11 does not only include these lower flammability refrigerants in Table 1102.3, but it also contains specific A2L and B2L provisions to address the precautions necessary for the proper use of these products.

In addition, Chapter 11 addresses other minimum requirements for refrigeration systems such as refrigeration machinery rooms (including ventilation), relief valves, and pressure vessels. Apart from refrigerants, the chapter also addresses minimum requirements for systems that use other mediums such as ammonia and brine systems. For ammonia systems, such systems are required to comply with IIAR 2, IIAR 3, IIAR4, and IIAR 5.

dresses other minimum requirements for refrigeration systems such as refrigeration machinery rooms (including ventilation), relief valves, and pressure vessels. Apart from refrigerants, the chapter also addresses minimum requirements for systems that use other mediums such as ammonia and brine systems. For ammonia systems, such systems are required to comply with IIAR 2, IIAR 3, IIAR4, and IIAR 5.

Chapter 12 Hydronics. Chapter 12 regulates hydronic systems that are part of heating, cooling, ventilation, and conditioning systems. Such piping systems include steam, hot water, chilled water, steam condensate, and the ground source heat pumps systems. The ground source heat pumps provisions in this chapter apply to the hydronics portions of the system. It is worth noting the Uniform Solar Energy & Hydronics Code (USEHC) address added provisions for ground source heat pumps in its geothermal energy system chapter.

Materials for piping and tubing must meet the working temperature and pressure of the system. In addition, materials must be compatible with the transfer medium to prevent deformation, bursting, or any chemical action between the material and the transfer medium. The allowable joining methods for piping or tubing are provided for application and enforcement purposes.

Chapter 13 Fuel Gas Piping. Chapter 13 regulates gas piping systems in a building, structure or within the property lines of buildings up to 5 psi. Gas piping systems must supply the minimum volume of gas required by each gas appliance to perform their proper operation under working conditions without exceeding the maximum pressure specified by each manufacturer. Because of the hazards associated with fuel gas, it is important to ensure the gas system has been inspected and tested, and that it is safe to turn on the gas supply to the building.

Chapter 14 Process Piping. Chapter 14 regulates process piping that typically is found in refineries. Process piping is considered the piping or tubing portion that transports liquid or gas, which is used directly in research, laboratory, or production process. This chapter may be used with another chapter of the code. For example, refrigeration piping, fuel gas piping, or fuel oil piping may need to comply with this chapter for process piping and the applicable chapter for materials, design, and installation.

Chapter 15 Solar Energy Systems. Chapter 15 refers the user to the Uniform Solar Energy and Hydronics Code (USEHC) for installations about solar energy systems. Reference is also made to Section 1203.0 as the heat source provisions are applicable to solar energy systems.

Chapter 16 Stationary Power Plants. This chapter provides minimum requirements for stationary fuel cell power plants. A fuel cell is a device that produces electricity by a chemical reaction. Fuel cells have been used mostly for satellites. However, the costs of fuel cells have decreased to a point where they are now economically attainable. With the increase in electricity costs, fuel cells are being considered as an alternative for producing electricity.

nimum requirements for stationary fuel cell power plants. A fuel cell is a device that produces electricity by a chemical reaction. Fuel cells have been used mostly for satellites. However, the costs of fuel cells have decreased to a point where they are now economically attainable. With the increase in electricity costs, fuel cells are being considered as an alternative for producing electricity.

Chapter 17 Referenced Standards. Chapter 17 provides two comprehensive tables with referenced standards. The standards listed in Table 1701.1 are applied as indicated in the applicable reference section(s). A list of additional standards, publications, practices, and guides that are not referenced in specific sections appear in Table 1701.2 and shall be submitted to the Authority Having Jurisdiction for approval.

Referenced standards set forth specific details of accepted practices, materials specifications, or test methods in many specialized applications. Standards provide an efficient method of conveying complex information and specifications on the performance requirements for materials, products, systems, application, and installation. The manner and purpose for a standard’s use and, in turn, code compliance, must be definitive in all references to the standard. If the standard is intended to

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FORMAT OF THE UNIFORM MECHANICAL CODE

be a requirement for judging code compliance, the code must state its intent for use. The standard should adequately address a defined need and at the same time specify the minimum performance requirements, technical characteristics and methods of testing, and required test results.

The referenced standards table is organized in a manner that makes it easy to find specific standards in alphabetical order, and by acronym of the publishing agency of the standard. The table lists the title of the standard, the edition, any addenda, and the section or sections of the code that reference the standard. Contact information for each publishing agency is provided at the end of the chapter.

Appendix A Residential Plan Examiner Review Form for HVAC System Design. A residential plan examiner review form is located in this appendix as an example to assist users in identifying whether the HVAC system has followed the approved procedures for system design (loads, equipment, and ducts).

Appendix B Procedures to be Followed to Place Gas Equipment in Operation. Appendix B provides requirements for the procedures that apply after an appliance is installed in place, piped, and connected to its venting system. The requirements include adjusting the burner input, air adjustments, verifying operation of safety shutoffs, automatic ignition, and protective devices, checking draft for vent-connected appliances, and operating instructions.

Appendix C Installation and Testing of Oil (Liquid) Fuel-Fired Equipment. Appendix C governs the installation, testing, or repair of oil or liquid fuel-burning equipment used in buildings or structures and equipment.

Appendix D Fuel Supply: Manufactured/Mobile Home Parks and Recreational Vehicle Parks. The provisions of this appendix apply to the fuel gas piping systems of mobile home and recreational vehicle parks. These provisions also apply to the use, maintenance, and installation for supplying fuel gas for accessory buildings or structures, and building components.

Appendix E Sustainable Practices. This appendix provides a comprehensive set of technically sound provisions that encourage sustainable practices and works toward improving the design and construction of mechanical systems that result in a positive long-term environmental impact. Environmental sustainability is important because it involves natural resources that human beings need for economic or manufactured capital. Their sustainability is defined by their reliance on infinitely available resources that are naturally occurring, constant, and free to access.

Appendix F Sizing of Venting Systems and Outdoor Combustion and Ventilation Opening Design. Appendix F provides added information on the sizing of gas vents. This appendix is useful to the end user for the proper sizing of venting systems. A series of examples are given that show how to use the tables and other requirements of Chapter 8. In addition, Appendix F shows an example of how to determine the required combination of indoor and outdoor combustion air opening sizes for appliances under Chapter 7. The combustion air example also provides a table that contains the required volume of space per the appliance BTU/h input based on the standard method.

Appendix G Example Calculation of Outdoor Air Rate. Appendix G gives an example of how to calculate the required outdoor air rate under Chapter 4.

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COMMITTEE ON UNIFORM MECHANICAL CODE

These lists represent the membership at the time the Committee was balloted on the final text of this edition. Since that time, changes in the membership may have occurred.

IAPMO Standards Council

Linden Raimer, Chairman Raimer Consulting Services, LLC, [U]

Carl Crimmins, MN State Pipe Trades [SE] Bill Erickson, CJ Erickson Plumbing Company [U] James Majerowicz, UA Instructor [L] Rich Prospal, ASSE [C]

Ron Rice, City of St. Paul [C] Robert “Bud” Riestenberg, Piping Systems, Inc. [U] Bob Siemsen, City of Lincoln [E] Kevin Tindall, Tindall & Ranson Plumbing, Heating & A/C, Inc. [I/M]

Nonvoting

Gabriella M. Davis, Secretary Lynne Simnick, Recording Secretary International Association of Plumbing and Mechanical Officials International Association of Plumbing and Mechanical Officials

IAPMO Uniform Mechanical Code Technical Committee

April Trafton, Chairperson American Society of Plumbing Engineers [SE]

Bob Adler, City of San Jose, California [E] Mike Afonso, UA Local 342 [L] DJ Berger, New Orleans Pipe Trades [L] Maggie Carroll, Underwriters Laboratories [R/S/T] Ian Chang, Intertek Testing Services [R/S/T] Richard Church, Plastic Pipe & Fittings Association [M] David Delaquila, National Propane Gas Association [U] David Dias, Sheet Metal Workers Local 104 [L] Pennie Feehan, Copper Development Association [M] Roel Garcia, City of Houston [E] Eli Howard, SMACNA [R/S/T] Ralph Koerber, Air Duct Council [M] Harvey Kreitenberg, Harvey Kreitenberg & Associates [I/M] David Mann, CA State Pipe Trades [L]

David Bixby, Air Conditioning Contractors of America [I/M] Dan Buuck, National Association of Home Builders [U] Phil Campbell, United Association [L] Michael Cudahy, Plastic Pipe & Fittings Association [M] TJ Dodd, Austin Area Plumbing & Pipe Fitters JATC [L] John Hamilton, NEMIC [L] Shawn Hargis, City of Los Angeles - Department of Building and

Safety [E]

Hugo Aguilar, IAPMO Staff Liaison Eric Nette, NFPA [R/S/T]

John Nielsen, State of Idaho [E] James Pavesic, United Association [L] Phil Ribbs, PHR Consultants [SE] Anthony Scarano, Plastic Piping Consultant [SE] Robert Sewell, Plumbers and Steamfitters, Local 159 [L] Chris Smith, Lubrizol Corporation [M] Donald Surrena, National Association of Home Builders [U] Don Taylor, Dittman Plumbing [SE] Chris Van Rite, Air Distribution Institute [M] Bob Wiseman, Air Conditioning Contractors of America [I/M] Osama Younan, City of Los Angeles - Department of Building and

Safety [E] Randy Young, Northern CA JATC [L]

Alternates

Vickie Lovell, Air Movement and Control Association International,

Inc. [M] Leonard A. Ramociotti, LAR Consulting [SE] Jason Shelton, Air Duct Council [M] John Taecker, Underwriters Laboratories [R/S/T] Che Timmons, Plumbers and Steamfitters Local 342 [L]

Nonvoting

DJ Nunez, Ex -Officio IAPMO [E] Laura Moreno, NFPA [R/S/T]

COMMITTEE MEMBERSHIP CLASSIFICATION ABBREVIATIONS These classifications apply to Technical Committee members and represent their principal interest in the activity of a committee.

M Manufacturer: A representative of a maker or marketer of a product, assembly or system, or portion thereof, that is affected by the

standard. U User: A representative of an entity that is subject to the provisions of the standard or that voluntarily uses the standard. I/M Installer/Maintainer: A representative of an entity that is in the business of installing or maintaining a product, assembly or system

affected by the standard. L Labor: A labor representative or employee concerned with safety in the workplace. R/S/T Research/Standards/Testing Laboratory: A representative of an independent research organization; an organization that develops

codes, standards or other similar documents; or an independent testing laboratory. E Enforcing Authority: A representative or an agency or an organization that promulgates and/or enforces standards. C Consumer: A person who is, or represents, the ultimate purchaser of a product, system, or service affected by the standard, but who is

not included in the User classification. SE Special Expert: A person not representing any of the previous classifications, but who has special expertise in the scope of the standard or

portion thereof.

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SECTION RELOCATION

2018 Location 2015 Location
505.2, 505.3
505.1.1, 505.1.2

505.1.1

505.1.3
505.6.1
505.2
505.8 – 505.11
505.3 – 505.6

Table 505.9

Table 505.4

506.5 – 506.7

506.3 – 506.5

506.8.1 – 506.8.4

506.5.1 – 506.5.4

506.8

506.6
506.10.2
506.7
506.11.1
506.7.1
506.11.2, 506.11.3
506.7.3, 506.7.4

506.11.6 – 506.11.6.3

506.7.7 – 506.7.7.3

506.9

506.8
507.2 – 507.6
507.1 – 507.5

519.1(1), 519.1(2)

508.1(3), 508.1(4)

519.2

508.4
508.4
508.5
508.3.1 – 508.3.4
508.6 – 508.9

Figure 508.3.3

Figure 508.8

508.5 – 508.5.1.5

508.10 – 508.10.1.5

Table 508.5.1.2

Table 508.10.1.2

Table 508.5.1.3

Table 508.10.1.3

Table 508.5.1.4

Table 508.10.1.4

Table 508.5.1.5

Table 508.10.1.5

519.3

508.10.1.6
508.5.2 – 508.5.3
508.10.2 – 508.10.3

508.3.5 – 508.3.5.3.3

508.11 – 508.11.3.3

508.6, 508.7

508.12, 508.13

519.4

510.1.7
510.1.7
510.1.8
519.5
510.10
510.10
510.11
508.1(3), 508.1(4)
519.1(1), 519.1(2)

602.2.4

602.2.5
902.13
702.0, 702.1
902.16

704.0, 704.1
802.2.4 – 802.2.7

802.2.2 – 802.2.5

802.6.1 – 802.6.5


802.6.2 – 802.6.6


Figure 802.6.1,
Table 802.6.1

Figure 802.6.2,
Table 802.6.2

Figure 802.6.3.1,
Figure 802.6.3.2

Figure 802.6.4.1,
Figure 802.6.4.2

802.7.3.3 – 802.7.3.5

802.7.3.4 - 802.7.3.6
2018 Location 2015 Location
Table 802.7.3.3
Table 802.7.3.4

803.2.7 – 803.2.27

803.2.6 – 803.2.26

902.6

902.5
902.8 – 902.12
902.6 – 902.10

904.2.1 – 904.2.9

904.2(1) – 904.2(9)

904.7 – 904.7.3

904.7(1) – 904.7(4)

905.6 – 905.6.3

905.6(1) – 905.6(4)

303.11 – 303.12

905.8 – 905.9

905.8 – 905.8.2

905.10 – 905.10.2

907.1 – 907.1.4

907.1(1) – 907.1(5)

911.2.1 – 911.2.3

911.2(1) – 911.2(3)

914.3 – 9.14.3.3

914.3(1) – 914.3(4)

914.7.1, 914.7.2

914.7(1), 914.7(2)
915.7.1, 915.7.2
915.7(1), 915.7(2)
918.3.1
918.3(2)
920.0 – 926.1
921.0 – 927.1
1312.2
927.2
926.2 – 938.1
927.3 – 939.1
926.3.1
927.4(2)
927.3.1
928.3(2)
1102.3
1102.2
1106.10
1106.12
1106.2
1106.3
1106.5, 1106.6
1106.6, 1106.7

1106.2.5.1

1107.2
1106.4
1107.3
1106.7 – 1106.9
1107.9 – 1107.11

1109.1.3, 1109.1.4

1109.1.2, 1109.1.3

1112.6 – 1112.14

1112.5 – 1112.13

Table 1112.12.3

Table 1112.11.3

1217.1.1

1201.4
1210.4
1205.4
1206.2
1206.3
1211.4 – 1211.14.2
1211.3 – 1211.13.2

1213.2 – 1213.3

1213.3 – 1213.4

1201.5

1213.5
1217.4 – 1217.6.2
1217.5 – 1217.7.2

Table 1217.4

Table 1217.5

1220.1 – 1220.3

1220.2 – 1220.4

Table 1220.2.1

Table 1220.3.1





1308.7.1 – 1308.7.8

1308.7.2 – 1308.7.9

1308.10 – 1308.13.1

1308.8 – 1308.11.1

xviii 2019 CALIFORNIA MECHANICAL CODE

SECTION RELOCATION

2018 Location 2015 Location
902.15
1310.0, 1310.1
1310.0 – 1310.1.3

1311.0 – 1311.1.3

1310.1.4 – 1310.2.4.2

1311.1.4 – 1311.2.4.2

Table 1310.2.4.1

Table 1311.2.4.1









































Equation 1315.3(1) –
Equation 1315.3(2)

Equation 1316.3(1) –
Equation 1316.3(2)



















Figure F 101.2(1) –
Figure F 101.2(14)

Figure F 101.1(1) –
Figure F 101.1(14)

2019 CALIFORNIA MECHANICAL CODE xix

The Documents Listed are Not by this Reference Adopted by The State of California.

IAPMO provides a variety of other products which are useful for inspectors, building officials, architects, engineers,

manufacturers, contractors, plumbers, and apprentices.

IAPMO Headquarters Directory 4755 East Philadelphia Street, Ontario, California 91761-2816 Publication Order Desk Phone: 800-85-IAPMO

Publication Toll Free Fax: 877-85-CODES

E-mail: iapmo@iapmo.org

Website: www.iapmo.org Free Code Question: 800-201-0335

Uniform Mechanical Code – 2018 Edition: The Uniform Mechanical Code contains complete requirements for the installation and maintenance of heating, ventilating, cooking and refrigeration systems.

Uniform Mechanical Code Illustrated Training Manual: Contains technical diagrams and illustrations that demonstrate the intent and use of the UMC. A great reference for everyone involved in Mechanical HVACR design and installation.

Uniform Mechanical Code Study Guide: The Study Guide is a complete self-study course for learning the UMC. A big help in getting ready for a certification exam! This book is the perfect complement to the UMC Illustrated Training Manual.

Guide to Important Code Questions to the Uniform Mechanical Code: An excellent reference for learning and understanding mechanical code changes and identifies code changes between editions. It is a useful tool for preparing code change proposals.

Uniform Plumbing Code – 2018 Edition: The Uniform Plumbing Code is the most widely adopted plumbing code in the world. The 2018 edition contains complete “turnkey” requirements for the installation and maintenance of plumbing systems, all in one easy to use book.

Uniform Plumbing Code Illustrated Training Manual: The UPC Illustrated Training Manual is an excellent reference for anyone involved in the plumbing industry. It contains an extensive definitions section and several hundred comprehensive technical diagrams and illustrations. It serves as a textbook, and it also is useful as a valuable tool for explaining the intent and use of the Code.

Uniform Plumbing Code Study Guide: This book is the perfect complement to the UPC Illustrated Training Manual. Alone, it constitutes a complete self-study course for learning the UPC. It has hundreds of questions, general practice exams, and plumbing math, pipe sizing exercises and fitting identification. A big help in getting you ready for a certification exam!

Guide to Important Code Questions to the Uniform Plumbing Code: An excellent reference for learning and understanding plumbing code changes and identifies code changes between editions. It is a useful tool for preparing code change proposals.

xx 2019 CALIFORNIA MECHANICAL CODE

RELATED PUBLICATIONS AND SERVICES

The Documents Listed are Not by this Reference Adopted by The State of California.

Uniform Swimming Pool, Spa, and Hot Tub Code – 2018 Edition: The Uniform Swimming Pool, Spa and Hot Tub Code contains complete and current requirements for the erection, installation, alteration, repair, relocation, replacement, addition to and use or maintenance of these systems.

Uniform Solar, Hydronics and Geothermal Code – 2018 Edition: The Uniform Solar, Hydronics and Geothermal Code contains complete requirements for the erection, installation, alteration, addition, repair, relocation, replacement, addition to, use or maintenance of these systems.

Drain Waste and Vent Calculator: A slide-rule style calculator provides quick and simple access to the fixture unit and sizing tables of Chapter 7 of the UPC.

Water Sizing Calculator: Sizing water systems becomes a much simpler task with the use of this handy slide-rule style calculator.

Natural Gas Pipe Sizing Calculator: This Natural Gas Pipe Sizing Calculator is presented in an easy to use and read slide-rule format. Designed for systems with a supply pressure of six to eight inches of water column, all pipe capacities are given in cubic feet per hour.

Trailer Standards: IAPMO has developed a number of standards for specialty products used in manufactured homes and recreational vehicles. These standards are available individually, or they may be purchased as a set.

Education and Training Seminars: IAPMO specializes in conducting training and education, including fulfilling continuing education requirements, on the UPC and UMC as well as all of the most commonly utilized codes in the Construction Trades. Special seminars on industry or code subjects are expeditiously created and delivered upon request. Please call to obtain the seminar schedule or to arrange for a custom special seminar.

:** IAPMO specializes in conducting training and education, including fulfilling continuing education requirements, on the UPC and UMC as well as all of the most commonly utilized codes in the Construction Trades. Special seminars on industry or code subjects are expeditiously created and delivered upon request. Please call to obtain the seminar schedule or to arrange for a custom special seminar.

Backflow Prevention Institute – IAPMO: The IAPMO Backflow Prevention Institute provides professional education and training for the control of hazards to our water supply and is dedicated to water-system safety worldwide. The Institute provides training in backflow prevention and cross-connection control. This program includes backflow preventers, testers, repairers, cross-connection control surveyors, program administrators and fire-sprinkler backflow preventer testers. Each of these courses provides compliance certification to American Society of Sanitary Engineering (ASSE) Series 5000 Professional Qualification Standards.

Backflow Prevention Reference Manual: This unique 300-page manual contains full-color illustrations and sections relating to real-world installations, backflow prevention, testing cross-connection control, repair and inspections. The manual is an excellent textbook and a reference the inspectors in every jurisdiction should have access too. It is also an important resource for system designers, urban planners and utility companies – professionals on both sides of the water meter.

Backflow Prevention Tech-Wheel: Find quick answers to your backflow preventer questions! The Backflow Tech-Wheel contains a wealth of information in a graphic, quick reference format. One side delivers solutions to device application questions; the other a troubleshooting guides offering solutions to backflow problems.

ANSI Z124 Standards: These standards are written to specifically address a variety of plastic plumbing fixtures and components. They are available individually, or may be grouped for quantity discounts.

2019 CALIFORNIA MECHANICAL CODE xxi

RELATED PUBLICATIONS AND SERVICES

The Documents Listed are Not by this Reference Adopted by The State of California.

IAPMO Installation Standards: IAPMO standards committees have formulated installation standards for a wide variety of commonly used plumbing materials and systems. The IAPMO installation standards are included after the text of the Uniform Plumbing Code, or can be purchased separately.

Material and Property Standards: IAPMO does not generally develop material and property standards, but when a need exists the Association will take a leadership role by filling the void. They are available, are subject to amendments and are withdrawn when recognized consensus standards are formulated.

OFFICIAL Magazine: IAPMO’s bimonthly publication features informative articles related to Plumbing and Mechanical HVACR installations, award winning general interest features, technical columns and industry updates. Subscriptions are available and all IAPMO members receive a free copy of every issue!

Membership in IAPMO: IAPMO membership is open to all interested persons. Membership categories include Student, Individual, Senior, Organizational and Governmental. Member benefits include discounted prices on IAPMO publications, a subscription to Official magazine, and numerous educational and training opportunities.

HOW TO CONTACT IAPMO Mailing Address: 4755 East Philadelphia Street, Ontario, California 91761-2816 Main Number: 909-472-4100 • Publication Orders: 800-85-IAPMO • Publication Fax: 877-85-CODES

Website: www.iapmo.orgOffice Hours: Monday – Friday, 8am – 5pm Pacific Time

xxii 2019 CALIFORNIA MECHANICAL CODE

TABLE OF CONTENTS

CHAPTER 1 DIVISION I 1.8.8 Appeals Board . . . . . . . . . . . . . . . .11
** CALIFORNIA ADMINISTRATION . . .1** 1.8.9 Unsafe Buildings or Structures . . . . 11
1.1.0 General . . . . . . . . . . . . . . . . . . . . . . .3 1.8.10 Other Building Regulations. . . . . . . 12
1.1.1 Title . . . . . . . . . . . . . . . . . . . . . . . . . .3 1.9.0 Division of the State Architect. . . . . 12
1.1.2 Purpose . . . . . . . . . . . . . . . . . . . . . .3 1.9.1 Reserved for the Division of the State
1.1.3 Scope . . . . . . . . . . . . . . . . . . . . . . . .3 Architect – Access Compliance . . . . 12
1.1.4 Appendices . . . . . . . . . . . . . . . . . . . .4 1.9.2 Division of the State Architect –
1.1.5
1.1.6
Referenced Codes . . . . . . . . . . . . . .4
NonBuilding Standards, Orders,
and Regulations . . . . . . . . . . . . . . . .4
1.10.0 Structural Safety . . . . . . . . . . . . . . . 12
Office of Statewide Health
Planning and Development . . . . . . 13
1.1.7
1.1.8
Order of Precedence and Use . . . . .4
City, County, or City and County
1.10.1
1.10.2
OSHPD 1 and OSHPD 1R . . . . . . . 13
OSHPD 2 . . . . . . . . . . . . . . . . . . . . 13
Amendments, Additions or 1.10.3 OSHPD 3 . . . . . . . . . . . . . . . . . . . . 13
Deletions . . . . . . . . . . . . . . . . . . . . . .5 1.10.4 OSHPD 4 . . . . . . . . . . . . . . . . . . . . 13
1.1.9 Effective Date of This Code . . . . . . .5 1.10.5 OSHPD 5 . . . . . . . . . . . . . . . . . . . . 14
1.1.10 Availability of Codes . . . . . . . . . . . . .5 1.11.0 Office of the State Fire Marshal . . . 14
1.1.11
1.1.12
Format . . . . . . . . . . . . . . . . . . . . . . .5
Validity . . . . . . . . . . . . . . . . . . . . . . .5
1.11.1 SFM – Office of the State
Fire Marshal . . . . . . . . . . . . . . . . . . 14
1.2.0
1.2.1
1.2.2
1.2.3
Building Standards Commission . . . .5
BSC . . . . . . . . . . . . . . . . . . . . . . . . .5
BSC-CG . . . . . . . . . . . . . . . . . . . . . .6
Alternative Materials, Design,
and Methods of Construction
and Equipment . . . . . . . . . . . . . . . . . . .6
1.11.2
1.11.3
1.11.4
1.11.5
1.11.6
Duties and Powers of the
Enforcing Agency . . . . . . . . . . . . . . 15
Construction Documents . . . . . . . . 17
Fees . . . . . . . . . . . . . . . . . . . . . . . . 17
Inspections . . . . . . . . . . . . . . . . . . . 18
Certificate of Occupancy . . . . . . . . 18
1.3.0 Reserved for Corrections
Standards Authority. . . . . . . . . . . . . .6
1.11.7
1.11.8
Temporary Structures and Uses. . . 18
Service Utilities . . . . . . . . . . . . . . . . 18
1.4.0 Department of Consumer Affairs . . .7 1.11.9 Stop Work Order. . . . . . . . . . . . . . . 18
1.4.2 Adopting Agency Identification . . . . .7 1.11.10 Unsafe Buildings, Structures,
1.5.0 Reserved for California Energy
Commission . . . . . . . . . . . . . . . . . . .7
1.11.11 and Equipment . . . . . . . . . . . . . . . . 18
Adopting Agency Identification . . . . 18
1.6.0 Reserved for Department of 1.12.0 Reserved for the State Librarian. . . 18
Food and Agriculture . . . . . . . . . . . .7 1.13.0 Reserved for the Department
1.7.0 California Department of of Water Resources . . . . . . . . . . . . 18
1.7.2 Public Health . . . . . . . . . . . . . . . . . .7
Adopting Agency Identification . . . . .7
1.14.0 Reserved for the State Lands
Commission . . . . . . . . . . . . . . . . . . 18
1.8.0
1.8.1
1.8.2
1.8.3
1.8.4
1.8.5
1.8.6
Department of Housing and
Community Development [HCD] . . .7
Purpose . . . . . . . . . . . . . . . . . . . . . .7
Authority and Abbreviations . . . . . . .7
Local Enforcing Agency . . . . . . . . . .8
Permits, Fees, Applications,
and Inspections . . . . . . . . . . . . . . . .9
Right of Entry for Enforcement . . . .10
Local Modification by Ordinance
or Regulation . . . . . . . . . . . . . . . . .10
CHAPTER 1
101.0
101.1
101.2
101.3
101.4
101.5
102.0
DIVISION II
ADMINISTRATION . . . . . . . . . . . . 19
General. . . . . . . . . . . . . . . . . . . . . . 19
Title. . . . . . . . . . . . . . . . . . . . . . . . . 19
Scope . . . . . . . . . . . . . . . . . . . . . . . 19
Purpose . . . . . . . . . . . . . . . . . . . . . 19
Unconstitutional . . . . . . . . . . . . . . . 19
Validity . . . . . . . . . . . . . . . . . . . . . . 19
Applicability. . . . . . . . . . . . . . . . . . . 19
1.8.7 Alternate Materials, Designs, Tests, 102.1 Conflicts Between Codes . . . . . . . . 19
and Methods of Construction . . . . .10 102.2 Existing Installations . . . . . . . . . . . . 19

2019 CALIFORNIA MECHANICAL CODE xxiii

102.3 Maintenance . . . . . . . . . . . . . . . . . . 19 301.1 Applicability. . . . . . . . . . . . . . . . . . . 47
102.4 Additions, Alterations, 301.2 Approval . . . . . . . . . . . . . . . . . . . . . 47
Renovations, or Repairs . . . . . . . . . 19 301.3 Design of Equipment . . . . . . . . . . . 47
102.5 Health and Safety . . . . . . . . . . . . . . 19 301.4 Electrical Connections . . . . . . . . . . 47
102.6 Changes in Building 301.5 Oil-Burning Appliances . . . . . . . . . . 47
Occupancy . . . . . . . . . . . . . . . . . . . 19 301.6 Personnel Protection . . . . . . . . . . . 47
102.7 Moved Structures . . . . . . . . . . . . . . 19 302.0 Materials – Standards
102.8 Appendices. . . . . . . . . . . . . . . . . . . 19 and Alternates . . . . . . . . . . . . . . . . 47
103.0 Duties and Powers of the 302.1 Minimum Standards . . . . . . . . . . . . 47
Authority Having Jurisdiction . . . . . 20 302.2 Alternate Materials and
103.1 General. . . . . . . . . . . . . . . . . . . . . . 20 Methods of Construction
103.2 Liability . . . . . . . . . . . . . . . . . . . . . . 20 Equivalency . . . . . . . . . . . . . . . . . . 47
103.3 Applications and Permits . . . . . . . . 20 302.3 Alternative
103.4 Right of Entry . . . . . . . . . . . . . . . . . 20 Engineered Design. . . . . . . . . . . . . 48
104.0 Permits . . . . . . . . . . . . . . . . . . . . . . 20 303.0 Installation . . . . . . . . . . . . . . . . . . . 48
104.1 Permits Required . . . . . . . . . . . . . . 20 303.1 Listed Appliances . . . . . . . . . . . . . . 48
104.2 Exempt Work . . . . . . . . . . . . . . . . . 20 303.2 Closet or Alcove Installations . . . . . 48
104.3 Application for Permit . . . . . . . . . . . 20 303.3 Unlisted Appliances . . . . . . . . . . . . 49
104.4 Permit Issuance . . . . . . . . . . . . . . . 21 303.4 Anchorage of Appliances . . . . . . . . 49
104.5 Fees . . . . . . . . . . . . . . . . . . . . . . . . 22 303.5 Movement. . . . . . . . . . . . . . . . . . . . 49
105.0 Inspections and Testing . . . . . . . . . 22 303.6 Identification of Equipment . . . . . . . 49
105.1
105.2
105.3
105.4
106.0
106.1
106.2
General. . . . . . . . . . . . . . . . . . . . . . 22
Required Inspections . . . . . . . . . . . 22
Testing of Systems . . . . . . . . . . . . . 23
Connection to Service Utilities . . . . 23
Violations and Penalties . . . . . . . . . 23
General. . . . . . . . . . . . . . . . . . . . . . 23
Notices of Correction
303.7
303.8
303.9
303.10
303.11
Liquefied Petroleum
Gas Facilities . . . . . . . . . . . . . . . . . 49
Appliances on Roofs. . . . . . . . . . . . 49
Avoiding Strain on
Gas Piping . . . . . . . . . . . . . . . . . . . 49
Clearances . . . . . . . . . . . . . . . . . . . 49
Installation in Commercial
Garages . . . . . . . . . . . . . . . . . . . . . 50
or Violation . . . . . . . . . . . . . . . . . . . 23 303.12 Installation in Aircraft Hangars . . . . 50
106.3 Penalties. . . . . . . . . . . . . . . . . . . . . 23 303.13 Pit Location. . . . . . . . . . . . . . . . . . . 50
106.4 Stop Orders . . . . . . . . . . . . . . . . . . 23 304.0 Accessibility for Service . . . . . . . . . 50
106.5 Authority to Disconnect
Utilities in Emergencies . . . . . . . . . 24
304.1
304.2
General. . . . . . . . . . . . . . . . . . . . . . 50
Sloped Roof . . . . . . . . . . . . . . . . . . 50
106.6 Authority to Condemn. . . . . . . . . . . 24 304.3 Access to Appliances
107.0 Board of Appeals . . . . . . . . . . . . . . 24 on Roofs . . . . . . . . . . . . . . . . . . . . . 50
107.1 General. . . . . . . . . . . . . . . . . . . . . . 24 304.4 Appliances in Attics and
107.2 Limitations of Authority . . . . . . . . . . 24 Under-Floor Spaces . . . . . . . . . . . . 50
Table 104.5 Mechanical Permit Fees . . . . . . . . . 25 305.0 Location . . . . . . . . . . . . . . . . . . . . . 51
305.1 Installation in Garages . . . . . . . . . . 51
CHAPTER 2 DEFINITIONS. . . . . . . . . . . . . . . . . 27 305.2 Flood Hazard Areas . . . . . . . . . . . . 51
201.0 General. . . . . . . . . . . . . . . . . . . . . . 29 305.3 Elevator Shaft . . . . . . . . . . . . . . . . . 51
201.1 Applicability. . . . . . . . . . . . . . . . . . . 29 305.4 Drainage Pan . . . . . . . . . . . . . . . . . 51
202.0 Definition of Terms . . . . . . . . . . . . . 29 306.0 Automatic Control Devices . . . . . . . 51
202.1 General. . . . . . . . . . . . . . . . . . . . . . 29 306.1 General. . . . . . . . . . . . . . . . . . . . . . 51
307.0 Labeling . . . . . . . . . . . . . . . . . . . . . 51
CHAPTER 3 GENERAL REGULATIONS. . . . . . 45 307.1 Fuel-Burning Appliances . . . . . . . . 51
301.0 General. . . . . . . . . . . . . . . . . . . . . . 47 307.2 Electric Heating Appliances . . . . . . 52

xxiv 2019 CALIFORNIA MECHANICAL CODE

307.3 Heat Pump and 316.3 Corrosion, Erosion, and
Electric Cooling Appliances . . . . . . 52 Mechanical Damage. . . . . . . . . . . . 55
307.4 Absorption Units . . . . . . . . . . . . . . . 52 316.4 Protectively Coated Pipe . . . . . . . . 55
308.0 Improper Location. . . . . . . . . . . . . . 52 316.5 Fire-Resistant Construction . . . . . . 55
308.1 General. . . . . . . . . . . . . . . . . . . . . . 52 316.6 Steel Nail Plates . . . . . . . . . . . . . . . 55
309.0 Workmanship . . . . . . . . . . . . . . . . . 52 316.7 Sleeves. . . . . . . . . . . . . . . . . . . . . . 55
309.1 Engineering Practices. . . . . . . . . . . 52 316.8 Firewalls . . . . . . . . . . . . . . . . . . . . . 55
309.2 Concealing Imperfections . . . . . . . . 52 316.9 Structural Members . . . . . . . . . . . . 55
309.3 Installation Practices. . . . . . . . . . . . 52 316.10 Rodentproofing . . . . . . . . . . . . . . . . 55
310.0 Condensate Wastes 316.11 Metal Collars. . . . . . . . . . . . . . . . . . 55
and Control . . . . . . . . . . . . . . . . . . . 52 317.0 Trenching, Excavation,
310.1 Condensate Disposal . . . . . . . . . . . 52 and Backfill . . . . . . . . . . . . . . . . . . . 55
310.2 Condensate Control . . . . . . . . . . . . 53 317.1 Trenches. . . . . . . . . . . . . . . . . . . . . 55
310.3 Condensate Waste Pipe 317.2 Tunneling and Driving. . . . . . . . . . . 55
Material and Sizing . . . . . . . . . . . . . 53 317.3 Open Trenches. . . . . . . . . . . . . . . . 55
Table 310.3
310.4
310.5
310.6
310.7
Minimum Condensate
Pipe Size . . . . . . . . . . . . . . . . . . . . 53
Appliance Condensate
Drains . . . . . . . . . . . . . . . . . . . . . . . 53
Point of Discharge . . . . . . . . . . . . . 53
Condensate Waste From
Air-Conditioning Coils . . . . . . . . . . . 53
Plastic Fittings . . . . . . . . . . . . . . . . 53
317.4
318.0
318.1
318.2
319.0
319.1
Excavations . . . . . . . . . . . . . . . . . . 55
Scope . . . . . . . . . . . . . . . . . . . . . . . 56
Applicability. . . . . . . . . . . . . . . . . . . 56
Services/Systems and Utilities . . . . 56
Steam and Hot-Water Systems . . . 56
Requirements for Hospitals
and Optional Services Provided
in Correctional Treatment
311.0 Heating or Cooling Air Centers . . . . . . . . . . . . . . . . . . . . . 56
System . . . . . . . . . . . . . . . . . . . . . . 53 319.2 Requirements for Skilled
311.1 Source . . . . . . . . . . . . . . . . . . . . . . 53 Nursing, Intermediate Care
311.2
311.3
311.4
Air Filters . . . . . . . . . . . . . . . . . . . . 53
Prohibited Source . . . . . . . . . . . . . . 54
Return-Air Limitations . . . . . . . . . . . 54
320.0 Facilities and Basic Services
Provided in Correctional
Treatment Centers . . . . . . . . . . . . . 56
Air Conditioning and
312.0 Plumbing Connections . . . . . . . . . . 54 Heating Systems. . . . . . . . . . . . . . . 56
312.1 General. . . . . . . . . . . . . . . . . . . . . . 54 320.1 Requirements for Hospitals
313.0 Hangers and Supports . . . . . . . . . . 54 and Optional Services
313.1
313.2
313.3
General. . . . . . . . . . . . . . . . . . . . . . 54
Material. . . . . . . . . . . . . . . . . . . . . . 54
Suspended Piping . . . . . . . . . . . . . 54
320.2 Provided in Correctional
Treatment Centers . . . . . . . . . . . . . 56
Requirements for Skilled
Nursing, Intermediate Care
313.4 Alignment . . . . . . . . . . . . . . . . . . . . 54 Facilities and Basic Services
313.5 Underground Installation . . . . . . . . 54 Provided in Correctional
313.6 Hanger Rod Sizes . . . . . . . . . . . . . 54 Treatment Centers . . . . . . . . . . . . . 56
Table 313.6
313.7
314.0
314.1
Hanger Rod Sizes . . . . . . . . . . . . . 54
Gas Piping . . . . . . . . . . . . . . . . . . . 54
Balancing . . . . . . . . . . . . . . . . . . . . 54
General. . . . . . . . . . . . . . . . . . . . . . 54
320.3
320.4
320.5
Requirements for Outpatient
Facilities and Licensed Clinics . . . . 56
Telephone and Data Equipment
Rooms . . . . . . . . . . . . . . . . . . . . . . 56
Psychiatric Services . . . . . . . . . . . . 57
315.0
315.1
316.0
Louvers in Hurricane
Prone Regions . . . . . . . . . . . . . . . . 54
General. . . . . . . . . . . . . . . . . . . . . . 54
Protection of Piping, Tubing,
Materials, and Structures . . . . . . . . 55
321.0
322.0
Table 303.10.1
Essential Mechanical
Provisions . . . . . . . . . . . . . . . . . . . . 57
Sensitive Areas or Rooms . . . . . . . 57
Reduction of Clearances
with Specified Forms
316.1 General. . . . . . . . . . . . . . . . . . . . . . 55 of Protection . . . . . . . . . . . . . . . . . . 58
316.2 Installation . . . . . . . . . . . . . . . . . . . 55 Table 313.3 Hangers and Supports . . . . . . . . . . 60

2019 CALIFORNIA MECHANICAL CODE xxv

CHAPTER 4 VENTILATION AIR . . . . . . . . . . . . 61 410.0 Laboratory Ventilating
401.0 General. . . . . . . . . . . . . . . . . . . . . . 63 Systems and Hoods . . . . . . . . . . . . 70
401.1 Applicability. . . . . . . . . . . . . . . . . . . 63 410.1 Laboratory Ventilating Systems.. . . 70
401.2
402.0
402.1
Filters . . . . . . . . . . . . . . . . . . . . . . . 63
Ventilation Air . . . . . . . . . . . . . . . . . 63
Occupiable Spaces. . . . . . . . . . . . . 63
410.2
410.3
Exhaust Hoods and
Safety Cabinets. . . . . . . . . . . . . . . . 70
Laboratory Fume Hoods. . . . . . . . . 70
402.2 Natural Ventilation . . . . . . . . . . . . . 63 411.0 Kitchen and Dining Areas . . . . . . . . 70
402.3
402.4
Mechanical Ventilation . . . . . . . . . . 64
Outdoor Air
Intake Protection. . . . . . . . . . . . . . . 64
412.0
413.0
Boiler, Mechanical, and
Electrical Rooms. . . . . . . . . . . . . . . 70
Odorous Rooms . . . . . . . . . . . . . . . 71
402.5
403.0
403.1
403.2
403.3
Bathroom Exhaust Fans . . . . . . . . . 64
Ventilation Rates . . . . . . . . . . . . . . 64
General. . . . . . . . . . . . . . . . . . . . . . 64
Zone Calculations. . . . . . . . . . . . . . 64
Single-Zone Systems . . . . . . . . . . . 64
414.0
414.1
414.2
415.0
Airborne Infection Isolation
Rooms . . . . . . . . . . . . . . . . . . . . . . 71
Exhaust Systems.. . . . . . . . . . . . . . 71
Air Distribution. . . . . . . . . . . . . . . . . 71
Protective Environment Rooms . . . 71
403.4 One Hundred Percent
Outdoor Air Systems . . . . . . . . . . . 65
415.1
416.0
Air Distribution. . . . . . . . . . . . . . . . . 71
Alarms – Airborne Infection
403.5 Multiple-Zone
Recirculating Systems . . . . . . . . . . 65
Isolation Rooms and Protective
Environment Rooms . . . . . . . . . . . . 71
403.6 Design for Varying
Operating Conditions . . . . . . . . . . . 65
417.0 Testing and Balancing Airborne
Infection Isolation Rooms and
403.7
403.8
403.9
404.0
404.1
404.2
Exhaust Ventilation. . . . . . . . . . . . . 65
Dynamic Reset . . . . . . . . . . . . . . . . 66
Air Classification
and Recirculation . . . . . . . . . . . . . . 66
Multiple-Zone Systems . . . . . . . . . . 66
General. . . . . . . . . . . . . . . . . . . . . . 66
Average Outdoor
Air Fraction . . . . . . . . . . . . . . . . . . . 66
418.0
418.2
418.3
418.4
418.5
Protective Environment Rooms . . . 72
Design Requirements for
Ethylene Oxide (ETO)
Sterilization Areas. . . . . . . . . . . . . . 72
Exhaust Requirements. . . . . . . . . . 72
Ventilation Requirements. . . . . . . . 72
Gas Valves. . . . . . . . . . . . . . . . . . . 72
Alarm Systems. . . . . . . . . . . . . . . . 72
404.3 Zone Ventilation Efficiency . . . . . . . 66 419.0 Neonatal Intensive Care Units . . . . 72
405.0 Evaporative Cooling System 419.1 Formula Preparation Area. . . . . . . . 72
for Health Care Facilities . . . . . . . . 67 419.2 Treatment Area/Room. . . . . . . . . . . 72
406.0 Reserved . . . . . . . . . . . . . . . . . . . . 67 Table 4-A Pressure Relationship and
407.0 Ventilation System Details . . . . . . . 67 Ventilation Requirements
407.1
407.2
407.3
General. . . . . . . . . . . . . . . . . . . . . . 67
Outdoor Air Intakes and
Exhaust Outlets. . . . . . . . . . . . . . . . 68
Air Balance. . . . . . . . . . . . . . . . . . . 68
for General Acute Care
Hospitals, Skilled Nursing
Facilities, Intermediate Care
Facilities, Correctional Treatment
Centers, Outpatient Facilities,
407.4 Air Circulation. . . . . . . . . . . . . . . . . 68 And Licensed Clinics . . . . . . . . . . . 73
407.5 Variable Air Volume.. . . . . . . . . . . . 69 Table 4-B Filter Efficiencies for Central
408.0 Filters . . . . . . . . . . . . . . . . . . . . . . . 69 Ventilation and Air-Conditioning
408.1 General. . . . . . . . . . . . . . . . . . . . . . 69 Systems In General Acute Care
408.2
408.3
408.4
409.0
Filters for Hospitals. . . . . . . . . . . . . 69
Filters for Skilled Nursing
Facilities, Intermediate Care
Facilities, and Correctional
Treatment Centers.. . . . . . . . . . . . . 69
Filters for Outpatient Facilities. . . . . 70
Ducts. . . . . . . . . . . . . . . . . . . . . . . . 70
Table 4-C Hospitals, Acute Psychiatric
Hospitals, Outpatient Facilities,
and Licensed Clinics. . . . . . . . . . . . 78
Filter Efficiencies for Central
Ventilation and Air-Conditioning
Systems In Skilled Nursing
Facilities and Intermediate
Care Facilities And Correctional
409.3 Insulation of Ducts. . . . . . . . . . . . . . 70 Treatment Centers . . . . . . . . . . . . . 78

xxvi 2019 CALIFORNIA MECHANICAL CODE

Table 402.1 Minimum Ventilation 506.0 Product-Conveying Ducts. . . . . . . . 89
Rates in Breathing Zone. . . . . . . . . 79 506.1 Materials . . . . . . . . . . . . . . . . . . . . . 89
Table 403.2.2
Table 403.5.2
Zone Air Distribution
Effectiveness . . . . . . . . . . . . . . . . . 81
System Ventilation Efficiency . . . . . 81
506.2
506.3
Table 506.2(1)
Construction . . . . . . . . . . . . . . . . . . 89
Penetrations . . . . . . . . . . . . . . . . . . 89
Minimum Sheet Metal
Table 403.7 Minimum Exhaust Rates. . . . . . . . . 82 Thickness for Round Ducts . . . . . . 90
506.4 Condensate . . . . . . . . . . . . . . . . . . 91
CHAPTER 5 EXHAUST SYSTEMS . . . . . . . . . . 83 506.5 Fittings . . . . . . . . . . . . . . . . . . . . . . 91
501.0 General. . . . . . . . . . . . . . . . . . . . . . 85 506.6 Explosion Venting. . . . . . . . . . . . . . 91
501.1 Applicability. . . . . . . . . . . . . . . . . . . 85 Table 506.2(2) Minimum Sheet Metal
502.0
502.1
502.2
Part I
503.0
503.1
Termination. . . . . . . . . . . . . . . . . . . 85
Exhaust Opening Protection. . . . . . 85
Termination of
Exhaust Ducts . . . . . . . . . . . . . . . . 85
Environmental Air Ducts and
Product-Conveying Systems. . . . 85
Motors, Fans, and Filters . . . . . . . . 85
General. . . . . . . . . . . . . . . . . . . . . . 85
506.7
506.8
506.9
506.10
Table 506.10.4
Thickness for
Rectangular Ducts . . . . . . . . . . . . . 92
Supports . . . . . . . . . . . . . . . . . . . . . 92
Fire Protection . . . . . . . . . . . . . . . . 92
Protection from
Physical Damage . . . . . . . . . . . . . . 92
Duct Clearances . . . . . . . . . . . . . . . 93
Basic Minimum Clearances to
Unprotected Surfaces. . . . . . . . . . . 93
503.2 Fans . . . . . . . . . . . . . . . . . . . . . . . . 85 506.11 Clearance Reduction Methods . . . . 93
504.0 Environmental Air Ducts . . . . . . . . . 85 Table 506.11 Reduction of Duct Clearance
504.1 General. . . . . . . . . . . . . . . . . . . . . . 85 with Specified forms of
504.2 Independent Exhaust Protection . . . . . . . . . . . . . . . . . . . . 94
Systems . . . . . . . . . . . . . . . . . . . . . 86 Part II Commercial Hoods and
504.3 Domestic Range . . . . . . . . . . . . . . . 86 Kitchen Ventilation . . . . . . . . . . . .95
504.4 Clothes Dryers . . . . . . . . . . . . . . . . 86 507.0 General Requirements . . . . . . . . . . 95
504.5 Heat (Energy) 507.1 Type I Hood Exhaust System . . . . . 95
Recovery Ventilators . . . . . . . . . . . 87 507.2 Exhaust System . . . . . . . . . . . . . . . 95
504.6 Gypsum Wallboard Ducts. . . . . . . . 87 507.3 Listed Devices . . . . . . . . . . . . . . . . 95
505.0 Product-Conveying Systems . . . . . 87 507.4 Clearance . . . . . . . . . . . . . . . . . . . . 95
505.1 General. . . . . . . . . . . . . . . . . . . . . . 87 507.5 Drawings. . . . . . . . . . . . . . . . . . . . . 96
505.2 Incompatible Materials . . . . . . . . . . 87 507.6 Notification of Change . . . . . . . . . . 96
505.3 Flammability Limit. . . . . . . . . . . . . . 87 508.0 Type I Hoods . . . . . . . . . . . . . . . . . 97
505.4 Air-Moving Devices. . . . . . . . . . . . . 87 508.1 Where Required . . . . . . . . . . . . . . . 97
505.5 Generating Flames, Sparks, 508.2 Listed Type I
or Hot Materials . . . . . . . . . . . . . . . 87 Hood Assemblies . . . . . . . . . . . . . . 97
505.6 Fire Dampers . . . . . . . . . . . . . . . . . 87 508.3 Construction of Type I Hoods . . . . . 97
505.7 Fire Detection and Alarm 508.4 Supports . . . . . . . . . . . . . . . . . . . . . 98
Systems . . . . . . . . . . . . . . . . . . . . . 88 508.5 Hood Size . . . . . . . . . . . . . . . . . . . . 98
505.8 Product-Conveying Ducts Table 508.5.1.2 Extra-Heavy-Duty Cooking
Classification . . . . . . . . . . . . . . . . . 88 Appliance Airflow . . . . . . . . . . . . . . 98
505.9 Minimum Velocities Table 508.5.1.3 Heavy-Duty Cooking
and Circulation . . . . . . . . . . . . . . . . 88 Appliance Airflow . . . . . . . . . . . . . . 98
Table 505.9 Minimum Duct Design Table 508.5.1.4 Medium-Duty Cooking
Velocities . . . . . . . . . . . . . . . . . . . . 88 Appliance Airflow . . . . . . . . . . . . . . 99
505.10 Makeup Air . . . . . . . . . . . . . . . . . . . 88 Table 508.5.1.5 Light-Duty Cooking
505.11 Hoods and Enclosures . . . . . . . . . . 88 Appliance Airflow . . . . . . . . . . . . . . 99
505.12 Pharmacies – Compounding 508.6 Solid-Fuel Hood Assemblies . . . . . 99
Area of Parenteral Solutions. . . . . . 89 508.7 Exhaust Outlets . . . . . . . . . . . . . . . 99

2019 CALIFORNIA MECHANICAL CODE xxvii

509.0 Grease Removal 513.13 Solid-Fuel Fire-Extinguishing
Devices in Hoods . . . . . . . . . . . . . . 99 Equipment . . . . . . . . . . . . . . . . . . 111
509.1 Grease Removal Devices. . . . . . . . 99 514.0 Procedures for the Use,
509.2 Installation . . . . . . . . . . . . . . . . . . . 99 Inspection, Testing, and
509.3 Solid-Fuel Grease Removal Maintenance of Equipment. . . . . . 111
Devices. . . . . . . . . . . . . . . . . . . . . 100 514.1 Operating Procedures . . . . . . . . . 111
510.0 Exhaust Duct Systems . . . . . . . . . 100 514.2 Inspection, Testing, and
510.1 General. . . . . . . . . . . . . . . . . . . . . 100 Maintenance . . . . . . . . . . . . . . . . . 111
510.2
510.3
Clearance . . . . . . . . . . . . . . . . . . . 100
Openings . . . . . . . . . . . . . . . . . . . 101
514.3 Inspection for
Grease Buildup. . . . . . . . . . . . . . . 112
510.4
510.5
510.6
510.7
510.8
510.9
Listed Grease Ducts . . . . . . . . . . . 101
Other Grease Ducts . . . . . . . . . . . 101
Exterior Installations . . . . . . . . . . . 102
Interior Installations . . . . . . . . . . . 102
Underground Installations. . . . . . . 104
Termination of Type I Hood
Exhaust System . . . . . . . . . . . . . . 104
Table 514.3
514.4
514.5
515.0
Schedule of Inspection for
Grease Buildup. . . . . . . . . . . . . . . 112
Cleaning of
Exhaust Systems . . . . . . . . . . . . . 112
Cooking Equipment
Maintenance . . . . . . . . . . . . . . . . . 112
Minimum Safety Requirements
for Cooking Equipment . . . . . . . . . 112
510.10 Solid-Fuel Duct Systems . . . . . . . 105 515.1 Cooking Equipment . . . . . . . . . . . 112
511.0
511.1
Air Movement . . . . . . . . . . . . . . . . 105
Exhaust Fans for Commercial
Cooking Operations . . . . . . . . . . . 105
515.2
516.0
Operating Controls . . . . . . . . . . . . 113
Recirculating Systems . . . . . . . . . 113
511.2 Airflow. . . . . . . . . . . . . . . . . . . . . . 106 516.1 General Requirements . . . . . . . . . 113
511.3 Makeup Air . . . . . . . . . . . . . . . . . . 107 516.2 Design Restrictions. . . . . . . . . . . . 113
511.4 Common Duct (Manifold) 516.3 Interlocks . . . . . . . . . . . . . . . . . . . 114
Systems . . . . . . . . . . . . . . . . . . . . 108 516.4 Location and Application
511.5 Solid-Fuel Air Movement Restrictions. . . . . . . . . . . . . . . . . . 114
Requirements . . . . . . . . . . . . . . . . 108 516.5 Additional Fire Safety
512.0 Auxiliary Equipment . . . . . . . . . . . 108 Requirements . . . . . . . . . . . . . . . . 114
512.1 Dampers . . . . . . . . . . . . . . . . . . . . 108 516.6 Use and Maintenance. . . . . . . . . . 114
512.2 Electrical Equipment. . . . . . . . . . . 108 517.0 Solid-Fuel
512.3 Other Equipment . . . . . . . . . . . . . 108 Cooking Operations . . . . . . . . . . . 114
512.4 Solid-Fuel 517.1 Venting Application. . . . . . . . . . . . 114
Auxiliary Equipment . . . . . . . . . . . 108 517.2 Location of Appliances . . . . . . . . . 115
513.0 Fire-Extinguishing
Equipment . . . . . . . . . . . . . . . . . . 108
517.3 Hoods for
Solid-Fuel Cooking . . . . . . . . . . . . 115
513.1 General. . . . . . . . . . . . . . . . . . . . . 108 517.4 Exhaust Systems for
513.2 Types of Equipment . . . . . . . . . . . 109 Solid-Fuel Cooking . . . . . . . . . . . . 115
513.3 Simultaneous Operation . . . . . . . . 110 517.5 Grease Removal Devices
513.4 Fuel and Electric for Solid-Fuel Cooking . . . . . . . . . 115
Power Shutoff . . . . . . . . . . . . . . . . 110 517.6 Air Movement for
513.5 Manual Activation . . . . . . . . . . . . . 110 Solid-Fuel Cooking . . . . . . . . . . . . 116
513.6 System Annunciation . . . . . . . . . . 110 517.7 Fire-Extinguishing Equipment
513.7 System Supervision . . . . . . . . . . . 110 for Solid-Fuel Cooking . . . . . . . . . 116
513.8 Special Design 517.8 Other Safety Requirements . . . . . 116
and Application . . . . . . . . . . . . . . . 111 518.0 Downdraft Appliances. . . . . . . . . . 117
513.9 Review and Certification. . . . . . . . 111 518.1 General. . . . . . . . . . . . . . . . . . . . . 117
513.10 Installation Requirements . . . . . . . 111 518.2 Ventilation System . . . . . . . . . . . . 117
513.11 Portable Fire Extinguishers . . . . . 111 518.3 Fire-Extinguishing
513.12 Maintenance . . . . . . . . . . . . . . . . . 111 Equipment . . . . . . . . . . . . . . . . . . 117

xxviii 2019 CALIFORNIA MECHANICAL CODE

CHAPTER 7 COMBUSTION AIR . . . . . . . . . . . 127
701.0 General. . . . . . . . . . . . . . . . . . . . . 129
701.1 Applicability. . . . . . . . . . . . . . . . . . 129
701.2 Pressure Difference . . . . . . . . . . . 129
701.3 Makeup Air . . . . . . . . . . . . . . . . . . 129
701.4 Indoor Combustion Air . . . . . . . . . 129
701.5 Indoor Opening Size and
Location . . . . . . . . . . . . . . . . . . . . 129
701.6 Outdoor Combustion Air . . . . . . . . 129
701.7 Combination Indoor and
Outdoor Combustion Air . . . . . . . . 130
701.8 Engineered Installations . . . . . . . . 131
701.9 Mechanical Combustion Air
Supply. . . . . . . . . . . . . . . . . . . . . . 131
701.10 Louvers, Grilles,
and Screens . . . . . . . . . . . . . . . . . 131
518.4 Airflow Switch or 605.1 Smoke Dampers. . . . . . . . . . . . . . 124
Transducer . . . . . . . . . . . . . . . . . . 117 605.2 Fire Dampers . . . . . . . . . . . . . . . . 124
518.5 Surface Materials . . . . . . . . . . . . . 117 605.3 Ceiling Radiation Dampers. . . . . . 124
519.0
519.1
519.2
519.3
519.4
519.5
Type II Hood Exhaust
System Requirements . . . . . . . . . 117
Where Required . . . . . . . . . . . . . . 117
Construction of Type II
Hoods . . . . . . . . . . . . . . . . . . . . . . 117
Dishwashing Appliances. . . . . . . . 117
Type II Exhaust Duct Systems . . . 118
Termination of Type II
Hood Exhaust System . . . . . . . . . 118
605.4
605.5
605.6
605.7
606.0
606.1
606.2
Multiple Arrangements . . . . . . . . . 125
Access and Identification . . . . . . . 125
Freedom from Interference. . . . . . 125
Temperature Classification
of Operating Elements . . . . . . . . . 125
Ventilating Ceilings . . . . . . . . . . . . 125
General. . . . . . . . . . . . . . . . . . . . . 125
Requirements . . . . . . . . . . . . . . . . 125
519.6 Makeup Air . . . . . . . . . . . . . . . . . . 118 607.0 Use of Under-Floor
Space as Supply Plenum
for Dwelling Units . . . . . . . . . . . . . 125
CHAPTER 6
601.0
DUCT SYSTEMS . . . . . . . . . . . . . 119
General. . . . . . . . . . . . . . . . . . . . . 121
607.1
607.2
General. . . . . . . . . . . . . . . . . . . . . 125
Dwelling Units. . . . . . . . . . . . . . . . 125
601.1
601.2
602.0
602.1
602.2
602.3
602.4
602.5
602.6
Applicability. . . . . . . . . . . . . . . . . . 121
Sizing Requirements . . . . . . . . . . 121
Material. . . . . . . . . . . . . . . . . . . . . 121
General. . . . . . . . . . . . . . . . . . . . . 121
Combustibles Within
Ducts or Plenums . . . . . . . . . . . . . 121
Metal. . . . . . . . . . . . . . . . . . . . . . . 121
Phenolic . . . . . . . . . . . . . . . . . . . . 121
Gypsum . . . . . . . . . . . . . . . . . . . . 121
Factory-Made Air Ducts . . . . . . . . 121
607.3
607.4
607.5
607.6
607.7
607.8
607.9
607.10
607.11
Enclosed. . . . . . . . . . . . . . . . . . . . 125
Flammable Materials . . . . . . . . . . 125
Access . . . . . . . . . . . . . . . . . . . . . 125
Automatic Control . . . . . . . . . . . . . 125
Temperature Limit . . . . . . . . . . . . 125
Noncombustible Receptacle. . . . . 125
Floor Registers . . . . . . . . . . . . . . . 125
Exterior Wall and Interior
Stud Partitions . . . . . . . . . . . . . . . 126
Wall Register . . . . . . . . . . . . . . . . 126
602.7
602.8
Vibration Isolators. . . . . . . . . . . . . 122
Corridors. . . . . . . . . . . . . . . . . . . . 122
607.12
607.13
Distance from Combustible . . . . . 126
Vapor Barrier . . . . . . . . . . . . . . . . 126
603.0
603.1
603.2
Installation of Ducts . . . . . . . . . . . 122
General. . . . . . . . . . . . . . . . . . . . . 122
Under Floor or Crawl Space . . . . . 122
607.14
608.0
608.1
Prohibited . . . . . . . . . . . . . . . . . . . 126
Automatic Shutoffs . . . . . . . . . . . . 126
Air-Moving Systems
603.3 Metal Ducts. . . . . . . . . . . . . . . . . . 122 and Smoke Detectors . . . . . . . . . . 126
603.4 Factory-Made Air Ducts . . . . . . . . 122
603.5 Flexible Air Ducts . . . . . . . . . . . . . 122 CHAPTER 7 COMBUSTION AIR . . . . . . . . . . . 127
603.6 Plastic Ducts. . . . . . . . . . . . . . . . . 123 701.0 General. . . . . . . . . . . . . . . . . . . . . 129
603.7 Protection of Ducts . . . . . . . . . . . . 123 701.1 Applicability. . . . . . . . . . . . . . . . . . 129
603.8 Support of Ducts. . . . . . . . . . . . . . 123 701.2 Pressure Difference . . . . . . . . . . . 129
603.9 Protection Against 701.3 Makeup Air . . . . . . . . . . . . . . . . . . 129
603.10 Flood Damage . . . . . . . . . . . . . . . 123
Joints and Seams of Ducts. . . . . . 123
701.4
701.5
Indoor Combustion Air . . . . . . . . . 129
Indoor Opening Size and
Table 603.10 Closure Markings . . . . . . . . . . . . . 123 Location . . . . . . . . . . . . . . . . . . . . 129
603.11 Cross Contamination . . . . . . . . . . 123 701.6 Outdoor Combustion Air . . . . . . . . 129
603.12 Underground Installation . . . . . . . 123 701.7 Combination Indoor and
603.13 Air Dispersion Systems . . . . . . . . 124 Outdoor Combustion Air . . . . . . . . 130
604.0 Insulation of Ducts . . . . . . . . . . . . 124 701.8 Engineered Installations . . . . . . . . 131
604.1 General. . . . . . . . . . . . . . . . . . . . . 124 701.9 Mechanical Combustion Air
605.0 Smoke Dampers, Supply. . . . . . . . . . . . . . . . . . . . . . 131
Fire Dampers, and 701.10 Louvers, Grilles,
Ceiling Dampers . . . . . . . . . . . . . . 124 and Screens . . . . . . . . . . . . . . . . . 131

2019 CALIFORNIA MECHANICAL CODE xxix

701.11 Combustion Air Ducts. . . . . . . . . . 132 803.0 Sizing of Category I
701.12 Dampers Prohibited . . . . . . . . . . . 132 Venting Systems. . . . . . . . . . . . . . 147
702.0
702.1
Extra Device or Attachment . . . . . 132
General. . . . . . . . . . . . . . . . . . . . . 132
803.1 Single Appliance Vent
Table 803.1.2(1) through
Table 803.1.2(6) . . . . . . . . . . . . . . 147
CHAPTER 8
801.0
CHIMNEYS AND VENTS. . . . . . . 133
General. . . . . . . . . . . . . . . . . . . . . 135
803.2 Multiple Appliance Vent
Table 803.2(1) through
Table 803.2(9) . . . . . . . . . . . . . . . 149
801.1
801.2
Applicability. . . . . . . . . . . . . . . . . . 135
Venting of Gas
Table 803.2.1 Vent Connector
Maximum Length . . . . . . . . . . . . . 149
Appliances . . . . . . . . . . . . . . . . . . 135 Table 803.1.2(1) Type B Double-Wall
801.3 Appliances Fueled Gas Vent. . . . . . . . . . . . . . . . . . . . 154
by Other Fuels . . . . . . . . . . . . . . . 135 Table 803.1.2(2) Type B Double-Wall
802.0 Venting of Appliances. . . . . . . . . . 135 Gas Vent. . . . . . . . . . . . . . . . . . . . 157
802.1 Listing . . . . . . . . . . . . . . . . . . . . . . 135 Table 803.1.2(3) Masonry Chimney. . . . . . . . . . . . . 159
802.2 Connection to Table 803.1.2(4) Masonry Chimney. . . . . . . . . . . . . 161
Venting Systems. . . . . . . . . . . . . . 135 Table 803.1.2(5) Single-Wall Metal
802.3 Design and Pipe or Type B
Construction . . . . . . . . . . . . . . . . . 135 Asbestos-Cement Vent. . . . . . . . . 163
802.4 Type of Venting Table 803.1.2(6) Exterior Masonry Chimney . . . . . . 164
System to be Used . . . . . . . . . . . . 136 Table 803.2(1) Type B Double-Wall Vent . . . . . . 165
802.5
Table 802.4
Masonry, Metal, and
Factory-Built Chimneys . . . . . . . . 136
Type of Venting
Table 803.2(2)
Table 803.2(3)
Type B Double-Wall Vent . . . . . . . 169
Masonry Chimney. . . . . . . . . . . . . 171
System to be Used . . . . . . . . . . . . 137 Table 803.2(4) Masonry Chimney. . . . . . . . . . . . . 173
802.6 Gas Vents. . . . . . . . . . . . . . . . . . . 139 Table 803.2(5) Single-Wall Metal
Table 802.6.1
802.7
Roof Pitch Height . . . . . . . . . . . . . 140
Single-Wall Metal Pipe . . . . . . . . . 142
Pipe or Type B
Asbestos-Cement Vent. . . . . . . . . 175
Table 802.7.3.3
802.8
Clearance for Connectors. . . . . . . 142
Through-the-Wall Vent
Table 803.2(6)
Table 803.2(7)
Exterior Masonry Chimney . . . . . . 175
Exterior Masonry Chimney . . . . . . 176
Termination. . . . . . . . . . . . . . . . . . 143 Table 803.2(8) Exterior Masonry Chimney . . . . . . 177
802.9 Condensation Drain . . . . . . . . . . . 144 Table 803.2(9) Exterior Masonry Chimney . . . . . . 178
802.10 Vent Connectors for
Category I Appliances . . . . . . . . . 144 CHAPTER 9 INSTALLATION OF
Table 802.10.1.3 Minimum Thickness for SPECIFIC APPLIANCES. . . . . . . 179
Galvanized Steel Vent
Connectors for Low-
Heat Appliances . . . . . . . . . . . . . . 145
901.0
901.1
General. . . . . . . . . . . . . . . . . . . . . 181
Applicability. . . . . . . . . . . . . . . . . . 181
Table 802.10.1.4 Minimum Thickness for
Steel Vent Connectors for
902.0
902.1
General. . . . . . . . . . . . . . . . . . . . . 181
Nonindustrial Appliance . . . . . . . . 181
Medium-Heat Appliances . . . . . . . 145 902.2 Combustion Air from
802.11 Vent Connectors for Bedroom or Bathroom . . . . . . . . . 181
Category II, Category III, and 902.3 Added or Converted
Category IV Appliances . . . . . . . . 146 Appliances . . . . . . . . . . . . . . . . . . 181
802.12 Draft Hoods and Draft 902.4 Type of Gas(es) . . . . . . . . . . . . . . 181
Controls . . . . . . . . . . . . . . . . . . . . 146 902.5 Safety Shutoff Devices for
802.13 Manually Operated Unlisted LP-Gas Appliance
Dampers . . . . . . . . . . . . . . . . . . . . 147 Used Indoors . . . . . . . . . . . . . . . . 181
802.14 Obstructions . . . . . . . . . . . . . . . . . 147 902.6 Fuel Input Rate . . . . . . . . . . . . . . . 181
802.15 Automatically Operated 902.7 Use of Air or Oxygen Under
Vent Dampers. . . . . . . . . . . . . . . . 147 Pressure . . . . . . . . . . . . . . . . . . . . 181

xxx 2019 CALIFORNIA MECHANICAL CODE

902.8 Building Structural 905.2 Installation of
Members. . . . . . . . . . . . . . . . . . . . 181 Duct Furnaces. . . . . . . . . . . . . . . . 185
902.9 Flammable Vapors . . . . . . . . . . . . 181 905.3 Access Panels . . . . . . . . . . . . . . . 185
902.10 Solid-Fuel Burning 905.4 Location of Draft Hoods
Appliances . . . . . . . . . . . . . . . . . . 181 and Controls . . . . . . . . . . . . . . . . . 185
902.11 Combination of Appliances 905.5 Circulating Air . . . . . . . . . . . . . . . . 185
and Equipment . . . . . . . . . . . . . . . 181 905.6 Duct Furnaces Used with
902.12 Protection of Gas Refrigeration Systems . . . . . . . . . 186
Appliances from Fumes
or Gases Other than
Products of Combustion . . . . . . . . 181
905.7 Installation in Commercial
Garages and
Aircraft Hangars . . . . . . . . . . . . . . 186
902.13
902.14
902.15
Process Air . . . . . . . . . . . . . . . . . . 182
Gas Appliance Pressure
Regulators . . . . . . . . . . . . . . . . . . 182
Venting of Gas Appliance
905.8
906.0
906.1
Electric Duct Heaters . . . . . . . . . . 186
Floor Furnaces . . . . . . . . . . . . . . . 186
Installation . . . . . . . . . . . . . . . . . . 186
Pressure Regulators. . . . . . . . . . . 182 906.2 Temperature
902.16 Bleed Lines for
Diaphragm-Type Valves . . . . . . . . 182
906.3 Limit Controls . . . . . . . . . . . . . . . . 186
Combustion and
903.0 Air-Conditioning Appliances . . . . . 182 Circulating Air . . . . . . . . . . . . . . . . 186
903.1
903.2
Electric Air Conditioners . . . . . . . . 182
Gas-Fired Air Conditioners
and Heat Pumps. . . . . . . . . . . . . . 182
906.4
906.5
906.6
Placement. . . . . . . . . . . . . . . . . . . 186
Bracing . . . . . . . . . . . . . . . . . . . . . 186
Support . . . . . . . . . . . . . . . . . . . . . 186
904.0 Central Heating Boilers 906.7 Clearance . . . . . . . . . . . . . . . . . . . 186
and Furnaces . . . . . . . . . . . . . . . . 183 906.8 Access . . . . . . . . . . . . . . . . . . . . . 187
904.1 Location . . . . . . . . . . . . . . . . . . . . 183 906.9 Seepage Pan . . . . . . . . . . . . . . . . 187
904.2 Clearance . . . . . . . . . . . . . . . . . . . 183 906.10 Wind Protection . . . . . . . . . . . . . . 187
Table 904.2.2 Clearances to 906.11 Upper-Floor Installations . . . . . . . 187
904.3 Combustible Material for
Unlisted Furnaces
and Boilers . . . . . . . . . . . . . . . . . . 184
Assembly and Installation. . . . . . . 184
906.12
906.13
907.0
First Floor Installation . . . . . . . . . . 187
Oil-Fired Floor Furnaces. . . . . . . . 187
Wall Furnaces. . . . . . . . . . . . . . . . 187
904.4 Temperature- or 907.1 Installation . . . . . . . . . . . . . . . . . . 187
Pressure-Limiting Devices . . . . . . 184 907.2 Location . . . . . . . . . . . . . . . . . . . . 188
904.5 Low-Water Cutoff . . . . . . . . . . . . . 184 907.3 Combustion and Circulating Air . . 188
904.6 Steam Safety and 907.4 Oil-Fired Wall Furnaces . . . . . . . . 188
Pressure-Relief Valves . . . . . . . . . 184 908.0 Clothes Dryers . . . . . . . . . . . . . . . 188
904.7 Furnace Plenums and 908.1 Electric Clothes Dryers . . . . . . . . . 188
Air Ducts . . . . . . . . . . . . . . . . . . . . 185 908.2 Gas-Fired Clothes Dryers. . . . . . . 188
904.8 Refrigeration Coils . . . . . . . . . . . . 185 909.0 Conversion Burners . . . . . . . . . . . 188
904.9 Cooling Units Used with 909.1 General. . . . . . . . . . . . . . . . . . . . . 188
Heating Boilers . . . . . . . . . . . . . . . 185 910.0 Burner Assemblies . . . . . . . . . . . . 188
904.10
904.11
Furnace (Upright
and Horizontal) . . . . . . . . . . . . . . . 185
Solid-Fuel-Fired Furnaces . . . . . . 185
910.1
910.2
911.0
Oil Burners . . . . . . . . . . . . . . . . . . 188
Gas Burners . . . . . . . . . . . . . . . . . 188
Decorative Appliances for
904.12 Oil-Fired Central Furnaces . . . . . . 185 Installation in Vented
904.13 Commercial or Industrial Fireplaces . . . . . . . . . . . . . . . . . . . 188
Gas Heaters . . . . . . . . . . . . . . . . . 185 911.1 Prohibited Installations . . . . . . . . . 188
904.14 Electric Central Furnaces . . . . . . . 185 911.2 Installation . . . . . . . . . . . . . . . . . . 188
905.0 Duct Furnaces . . . . . . . . . . . . . . . 185 911.3 Fireplace Screens. . . . . . . . . . . . . 188
905.1 Clearances . . . . . . . . . . . . . . . . . . 185 912.0 Gas Fireplaces, Vented . . . . . . . . 188

2019 CALIFORNIA MECHANICAL CODE xxxi

912.1 Prohibited Installations . . . . . . . . . 188 917.4 Ductwork. . . . . . . . . . . . . . . . . . . . 191
912.2 Installation . . . . . . . . . . . . . . . . . . 188 917.5 Installation in Commercial
Table 911.2 Free Opening Area of Chimney
Damper for Venting Flue Gases
Garages and Aircraft
Hangars . . . . . . . . . . . . . . . . . . . . 191
from Unlisted Decorative 917.6 Oil-Fired Unit Heaters. . . . . . . . . . 191
Appliances for Installation 918.0 Food Service Appliance,
in Vented Fireplaces. . . . . . . . . . . 189 Floor Mounted . . . . . . . . . . . . . . . 192
912.3 Combustion and 918.1 Clearance for Listed
Circulating Air . . . . . . . . . . . . . . . . 189 Appliances . . . . . . . . . . . . . . . . . . 192
913.0 Factory-Built Fireplaces 918.2 Clearance for Unlisted
and Fireplace Stoves . . . . . . . . . . 189 Appliances . . . . . . . . . . . . . . . . . . 192
913.1 Factory-Built Fireplaces . . . . . . . . 189 918.3 Mounting on Combustible
913.2 Fireplace Stoves. . . . . . . . . . . . . . 189 Floors . . . . . . . . . . . . . . . . . . . . . . 192
913.3
914.0
914.1
Fireplace Accessories . . . . . . . . . 189
Non-Recirculating Direct
Gas-Fired Industrial
Air Heaters . . . . . . . . . . . . . . . . . . 189
Application . . . . . . . . . . . . . . . . . . 189
918.4
918.5
918.6
Installation on Noncombustible
Floors . . . . . . . . . . . . . . . . . . . . . . 192
Combustible Material
Adjacent to Cooking Top . . . . . . . 192
Use with Casters . . . . . . . . . . . . . 192
914.2
914.3
914.4
914.5
914.6
914.7
Prohibited Installations . . . . . . . . . 189
Installation . . . . . . . . . . . . . . . . . . 189
Clearance from Combustible
Materials . . . . . . . . . . . . . . . . . . . . 189
Air Supply . . . . . . . . . . . . . . . . . . . 189
Atmospheric Vents, Gas
Reliefs, or Bleeds . . . . . . . . . . . . . 189
Relief Openings . . . . . . . . . . . . . . 190
918.7
918.8
919.0
919.1
919.2
919.3
Level Installation. . . . . . . . . . . . . . 192
Ventilation. . . . . . . . . . . . . . . . . . . 192
Food Service Appliances,
Counter Appliances . . . . . . . . . . . 192
Vertical Clearance . . . . . . . . . . . . 192
Clearance for Listed
Appliances . . . . . . . . . . . . . . . . . . 192
Clearance for Unlisted
Appliances . . . . . . . . . . . . . . . . . . 193
914.8 Purging . . . . . . . . . . . . . . . . . . . . . 190 919.4 Mounting of Unlisted
915.0 Recirculating Direct Gas-Fired Appliances . . . . . . . . . . . . . . . . . . 193
Industrial Air Heaters . . . . . . . . . . 190 920.0 Household Cooking
915.1 Application . . . . . . . . . . . . . . . . . . 190 Appliances . . . . . . . . . . . . . . . . . . 193
915.2
915.3
915.4
915.5
915.6
Prohibited Installations . . . . . . . . . 190
Installation . . . . . . . . . . . . . . . . . . 190
Clearance from Combustible
Materials . . . . . . . . . . . . . . . . . . . . 190
Air Supply . . . . . . . . . . . . . . . . . . . 190
Atmospheric Vents, Gas
Reliefs, or Bleeds . . . . . . . . . . . . . 190
920.1
920.2
920.3
920.4
921.0
Electric Household
Cooking Appliances . . . . . . . . . . . 193
Gas-Fired Household Cooking
Appliances . . . . . . . . . . . . . . . . . . 193
Floor-Mounted Units . . . . . . . . . . . 193
Built-In Units . . . . . . . . . . . . . . . . . 193
Cooking Appliances Listing . . . . . 194
915.7 Relief Openings . . . . . . . . . . . . . . 190 921.1 Commercial Electric
Ranges . . . . . . . . . . . . . . . . . . . . . 194
915.8
916.0
Purging . . . . . . . . . . . . . . . . . . . . . 190
Room Heaters . . . . . . . . . . . . . . . 190
921.2 Commercial Wood-Fired
Baking Ovens . . . . . . . . . . . . . . . . 194
916.1 Electric Room Heaters . . . . . . . . . 190 921.3 Oil-Burning Ranges . . . . . . . . . . . 194
916.2 Gas-Fired Room Heaters . . . . . . . 190 922.0 Open-Top Broiler Units. . . . . . . . . 194
916.3
917.0
917.1
Solid-Fuel-Type
Room Heaters . . . . . . . . . . . . . . . 191
Unit Heaters . . . . . . . . . . . . . . . . . 191
Support . . . . . . . . . . . . . . . . . . . . 191
922.1
922.2
922.3
Listed Units. . . . . . . . . . . . . . . . . . 194
Unlisted Units . . . . . . . . . . . . . . . . 194
Protection Above
Domestic Units . . . . . . . . . . . . . . . 194
917.2 Clearance . . . . . . . . . . . . . . . . . . 191 922.4 Commercial Units . . . . . . . . . . . . . 194
917.3 Combustion and 923.0 Outdoor Cooking
Circulating Air . . . . . . . . . . . . . . . . 191 Appliances . . . . . . . . . . . . . . . . . . 194

xxxii 2019 CALIFORNIA MECHANICAL CODE

923.1 Listed Units. . . . . . . . . . . . . . . . . . 194 931.1 General. . . . . . . . . . . . . . . . . . . . . 196
923.2 Unlisted Units . . . . . . . . . . . . . . . . 194 931.2 Installation . . . . . . . . . . . . . . . . . . 196
924.0 Illuminating Appliances. . . . . . . . . 194 931.3 Fuel-Gas Controls . . . . . . . . . . . . 196
924.1 Clearances for Listed 931.4 Electrical Equipment. . . . . . . . . . . 196
Appliances . . . . . . . . . . . . . . . . . . 194 931.5 Installations Inside Buildings . . . . 196
924.2
Table 924.2.1
Clearances for Unlisted
Appliances . . . . . . . . . . . . . . . . . . 194
Clearances for Unlisted Outdoor
Open-Flame Illuminating
Appliances . . . . . . . . . . . . . . . . . . 195
931.6
932.0
932.1
Exterior Installations . . . . . . . . . . . 197
Outdoor Open Flame
Decorative Appliances . . . . . . . . . 197
General. . . . . . . . . . . . . . . . . . . . . 197
924.3
924.4
924.5
Mounting on Buildings . . . . . . . . . 195
Mounting on Posts . . . . . . . . . . . . 195
Appliance Pressure
Regulators . . . . . . . . . . . . . . . . . . 195
933.0
933.1
933.2
Evaporative Cooling
Systems . . . . . . . . . . . . . . . . . . . . 197
General. . . . . . . . . . . . . . . . . . . . . 197
Location . . . . . . . . . . . . . . . . . . . . 197
925.0
925.1
Incinerators and Crematories . . . . 195
Field Constructed
Commercial-Industrial
933.3
933.4
Access, Inspection,
and Repair . . . . . . . . . . . . . . . . . . 197
Installation . . . . . . . . . . . . . . . . . . 197
Incinerators. . . . . . . . . . . . . . . . . . 195 934.0 Refrigeration Appliances . . . . . . . 197
925.2 Factory-Built 934.1 Self-Contained Refrigerators
Commercial Crematories . . . . . . . 195 and Freezers . . . . . . . . . . . . . . . . 197
925.3 Residential Incinerators . . . . . . . . 195 934.2 Unit Coolers . . . . . . . . . . . . . . . . . 197
926.0 Infrared Heaters . . . . . . . . . . . . . . 195 934.3 Self-Contained Mechanical
926.1 Support . . . . . . . . . . . . . . . . . . . . . 195 Refrigeration Systems . . . . . . . . . 197
926.2 Clearance . . . . . . . . . . . . . . . . . . . 195 935.0 Ductless Mini-Split
926.3 Combustion and Systems Installation . . . . . . . . . . . 197
Ventilation Air . . . . . . . . . . . . . . . . 195 935.1 General. . . . . . . . . . . . . . . . . . . . . 197
926.4 Installation in Commercial 936.0 Air Filter Appliances . . . . . . . . . . . 197
Garages and
Aircraft Hangars . . . . . . . . . . . . . . 195
936.1
936.2
Electrostatic Air Cleaners . . . . . . . 197
High-Efficiency Particulate
927.0 Pool Heaters. . . . . . . . . . . . . . . . . 195 Air Filter Units . . . . . . . . . . . . . . . . 197
927.1 Location . . . . . . . . . . . . . . . . . . . . 195 937.0 Gaseous Hydrogen Systems . . . . 197
927.2 Clearance . . . . . . . . . . . . . . . . . . . 195 937.1 General. . . . . . . . . . . . . . . . . . . . . 197
927.3 Temperature or Pressure-
Limiting Devices . . . . . . . . . . . . . . 195
938.0 Compressed Natural Gas (CNG)
Vehicular Fuel Systems . . . . . . . . 197
927.4 Bypass Valves . . . . . . . . . . . . . . . 196 938.1 General. . . . . . . . . . . . . . . . . . . . . 197
927.5 Venting . . . . . . . . . . . . . . . . . . . . . 196
928.0
928.1
Refrigerators. . . . . . . . . . . . . . . . . 196
Clearance . . . . . . . . . . . . . . . . . . . 196
CHAPTER 10 BOILERS AND
PRESSURE VESSELS . . . . . . . . 199
928.2
929.0
929.1
929.2
929.3
930.0
Venting or Ventilating Kits
Approved for Use with a
Refrigerator. . . . . . . . . . . . . . . . . . 196
Gas-Fired Toilets . . . . . . . . . . . . . 196
Clearance . . . . . . . . . . . . . . . . . . . 196
Installation on
Combustible Floors. . . . . . . . . . . . 196
Vents . . . . . . . . . . . . . . . . . . . . . . 196
Appliances for Installation
1001.0
1001.1
1001.2
1001.3
1001.4
1001.5
1001.6
General. . . . . . . . . . . . . . . . . . . . . 201
Applicability. . . . . . . . . . . . . . . . . . 201
Boiler Rooms and Enclosures . . . 201
Air for Combustion
and Ventilation . . . . . . . . . . . . . . . 201
Drainage . . . . . . . . . . . . . . . . . . . . 201
Mounting. . . . . . . . . . . . . . . . . . . . 201
Chimneys or Vents . . . . . . . . . . . . 201
in Manufactured Housing . . . . . . . 196 1002.0 Standards . . . . . . . . . . . . . . . . . . . 201
930.1 General. . . . . . . . . . . . . . . . . . . . . 196 1002.1 General. . . . . . . . . . . . . . . . . . . . . 201
931.0 Small Ceramic Kilns . . . . . . . . . . . 196 1002.2 Oil-Burning Boilers . . . . . . . . . . . . 201

2019 CALIFORNIA MECHANICAL CODE xxxiii

1002.3 Electric Boilers . . . . . . . . . . . . . . . 201 1012.0 Operating Adjustments and
1002.4 Solid-Fuel-Fired Boilers . . . . . . . . 201 Instructions . . . . . . . . . . . . . . . . . . 204
1002.5 Dual Purpose Water Heater . . . . . 201 1012.1 General. . . . . . . . . . . . . . . . . . . . . 204
1003.0 Detailed Requirements . . . . . . . . . 201 1013.0 Inspections and Tests. . . . . . . . . . 204
1003.1 Safety Requirements . . . . . . . . . . 201 1013.1 General. . . . . . . . . . . . . . . . . . . . . 204
1003.2 Controls . . . . . . . . . . . . . . . . . . . . 202 1013.2 Operating Permit . . . . . . . . . . . . . 204
1003.3 Gauges . . . . . . . . . . . . . . . . . . . . . 202 1013.3 Maintenance Inspection . . . . . . . . 204
1003.4 Stack Dampers . . . . . . . . . . . . . . . 202 1013.4 Power and Miniature Boilers. . . . . 204
1003.5
1004.0
1004.1
1004.2
1004.3
1004.4
Table 1004.4(1)
Welding. . . . . . . . . . . . . . . . . . . . . 202
Expansion Tanks . . . . . . . . . . . . . 202
General. . . . . . . . . . . . . . . . . . . . . 202
Open-Type Expansion
Tanks . . . . . . . . . . . . . . . . . . . . . . 202
Closed-Type Systems . . . . . . . . . 202
Minimum Capacity of Closed-
Type Tank. . . . . . . . . . . . . . . . . . . 202
Expansion Tank Capacities for
Gravity Hot Water Systems . . . . . 202
1013.5
1013.6
1013.7
1014.0
1014.1
Table 1003.2.1
Steam-Heating and Water-
Heating Boilers . . . . . . . . . . . . . . . 205
Automatic Steam-Heating
Boilers. . . . . . . . . . . . . . . . . . . . . . 205
Unfired Pressure Vessels . . . . . . . 205
Operation and Maintenance of
Boilers and Pressure Vessels. . . . 205
General. . . . . . . . . . . . . . . . . . . . . 205
Controls and Limit Devices for
Automatic Boilers . . . . . . . . . . . . . 206
Table 1004.4(2) Expansion Tank Capacities for
Forced Hot Water Systems . . . . . 203
CHAPTER 11 REFRIGERATION . . . . . . . . . . . . 209
1005.0 Safety or Relief 1101.0 General. . . . . . . . . . . . . . . . . . . . . 211
Valve Discharge . . . . . . . . . . . . . . 203 1101.1 Applicability. . . . . . . . . . . . . . . . . . 211
1005.1 General. . . . . . . . . . . . . . . . . . . . . 203 1101.2 Equipment . . . . . . . . . . . . . . . . . . 211
1005.2 Discharge Piping . . . . . . . . . . . . . 203 Part I Refrigeration Systems . . . . . . . . 211
1005.3 Splash Shield . . . . . . . . . . . . . . . . 203 1102.0 Refrigeration Systems . . . . . . . . . 211
1005.4 Hazardous Discharge . . . . . . . . . . 203 1102.1 General. . . . . . . . . . . . . . . . . . . . . 211
1005.5
1006.0
1006.1
1007.0
Vacuum Relief Valve . . . . . . . . . . 203
Shutoff Valves . . . . . . . . . . . . . . . 203
General. . . . . . . . . . . . . . . . . . . . . 203
Gas-Pressure Regulators . . . . . . . 203
1102.2
1102.3
1103.0
Ammonia Refrigeration
Systems . . . . . . . . . . . . . . . . . . . . 211
Refrigerants . . . . . . . . . . . . . . . . . 211
Classification . . . . . . . . . . . . . . . . 211
1007.1
1008.0
General. . . . . . . . . . . . . . . . . . . . . 203
Low-Water Cutoff . . . . . . . . . . . . . 203
1103.1
1103.2
Classification of Refrigerants . . . . 211
Classification of Refrigeration
Systems . . . . . . . . . . . . . . . . . . . . 211
1008.1 General. . . . . . . . . . . . . . . . . . . . . 203 1103.3 Higher Flammability
1009.0 Combustion Regulators – Refrigerants . . . . . . . . . . . . . . . . . 211
Safety Valves . . . . . . . . . . . . . . . . 203 1104.0 Requirements for Refrigerant
1009.1 General. . . . . . . . . . . . . . . . . . . . . 203 and Refrigeration
1010.0 Clearance for Access . . . . . . . . . . 204 System Use . . . . . . . . . . . . . . . . . 211
1010.1 General. . . . . . . . . . . . . . . . . . . . . 204 1104.1 System Selection . . . . . . . . . . . . . 211
1010.2 Power Boilers . . . . . . . . . . . . . . . . 204 1104.2 Refrigerant Concentration
1010.3 Steam-Heating Boilers, Limit . . . . . . . . . . . . . . . . . . . . . . . 211
Hot Water Boilers, and 1104.3 Institutional Occupancies . . . . . . . 212
Power Boilers . . . . . . . . . . . . . . . . 204 1104.4 Industrial Occupancies and
1010.4 Package Boilers, Steam-Heating Refrigerated Rooms . . . . . . . . . . . 212
Boilers, and Hot-Water-Heating 1104.5 Flammable Refrigerants . . . . . . . . 212
Boilers. . . . . . . . . . . . . . . . . . . . . . 204 1104.6 Applications for Human Comfort
1011.0 Boilers, Stokers, and and for Nonindustrial
Steam Generators . . . . . . . . . . . . 204 Occupancies. . . . . . . . . . . . . . . . . 212
1011.1 General. . . . . . . . . . . . . . . . . . . . . 204 1104.7 Refrigerant Type and Purity . . . . . 212

xxxiv 2019 CALIFORNIA MECHANICAL CODE

1104.8 Changing Refrigerants . . . . . . . . . 213 1109.2 Joints . . . . . . . . . . . . . . . . . . . . . . 218
1105.0 General Requirements . . . . . . . . . 213 1109.3 Penetration of Piping . . . . . . . . . . 218
1105.1 Human Comfort . . . . . . . . . . . . . . 213 1109.4 Location of Refrigeration Piping . . 218
1105.2 Supports and Anchorage . . . . . . . 213 1109.5 Underground Piping . . . . . . . . . . . 218
1105.3 Access . . . . . . . . . . . . . . . . . . . . . 213 1109.6 Support . . . . . . . . . . . . . . . . . . . . . 218
1105.4 Illumination and Service 1109.7 Pipe Enclosure . . . . . . . . . . . . . . . 218
Receptacles . . . . . . . . . . . . . . . . . 213 1109.8 Visual Inspection . . . . . . . . . . . . . 219
1105.5 Ventilation of Rooms 1109.9 Condensation . . . . . . . . . . . . . . . . 219
Containing Condensing Units . . . . 213 1109.10 Identification . . . . . . . . . . . . . . . . . 219
1105.6 Prohibited Locations . . . . . . . . . . . 214 1110.0 Valves. . . . . . . . . . . . . . . . . . . . . . 219
1105.7 Condensate . . . . . . . . . . . . . . . . . 214 1110.1 More than 6.6 Pounds
1105.8 Defrost . . . . . . . . . . . . . . . . . . . . . 214 of Refrigerant . . . . . . . . . . . . . . . . 219
1105.9
1105.10
Overflows . . . . . . . . . . . . . . . . . . . 214
Condensate, Defrost, and
Overflow Disposal. . . . . . . . . . . . . 214
1110.2
1110.3
More than 110 Pounds
of Refrigerant . . . . . . . . . . . . . . . . 219
Support . . . . . . . . . . . . . . . . . . . . . 219
1105.11 Refrigerant Port Protection . . . . . . 214 1110.4 Access . . . . . . . . . . . . . . . . . . . . . 219
1105.12 Storage . . . . . . . . . . . . . . . . . . . . . 214 1110.5 Identification . . . . . . . . . . . . . . . . . 219
1106.0 Refrigeration Machinery Rooms . . 214 1111.0 Pressure-Limiting Devices . . . . . . 219
1106.1 Where Required . . . . . . . . . . . . . . 214 1111.1 Where Required . . . . . . . . . . . . . . 219
1106.2 Refrigeration Machinery Room, 1111.2 Setting . . . . . . . . . . . . . . . . . . . . . 219
General Requirements . . . . . . . . . 214 1111.3 Location . . . . . . . . . . . . . . . . . . . . 219
Table 1106.2.5.2 Required Airflow for Group 1111.4 Emergency Stop . . . . . . . . . . . . . . 219
A2L Refrigerants. . . . . . . . . . . . . . 216 1112.0 Pressure-Relief Devices . . . . . . . . 219
1106.3 Normal Operation . . . . . . . . . . . . . 216 1112.1 General. . . . . . . . . . . . . . . . . . . . . 219
1106.4 Natural Ventilation . . . . . . . . . . . . 216 1112.2 Positive Displacement
1106.5
1106.6
1106.7
1106.8
Combustion Air . . . . . . . . . . . . . . . 216
Airflow. . . . . . . . . . . . . . . . . . . . . . 216
Ventilation Intake . . . . . . . . . . . . . 216
Maximum Temperature . . . . . . . . 216
1112.3
1112.4
1112.5
Compressor . . . . . . . . . . . . . . . . . 220
Liquid-Containing Portions
of Systems . . . . . . . . . . . . . . . . . . 220
Evaporators . . . . . . . . . . . . . . . . . 220
Hydrostatic Expansion . . . . . . . . . 220
1106.9
1106.10
Refrigerant Parts in Air Duct. . . . . 216
Dimensions. . . . . . . . . . . . . . . . . . 217
1112.6
1112.7
Actuation. . . . . . . . . . . . . . . . . . . . 220
Stop Valves Prohibited . . . . . . . . . 221
1106.11
1106.12
1107.0
Restricted Access. . . . . . . . . . . . . 217
Exits . . . . . . . . . . . . . . . . . . . . . . . 217
Machinery Room, Special
Requirements . . . . . . . . . . . . . . . . 217
1112.8
1112.9
1112.10
Location . . . . . . . . . . . . . . . . . . . . 221
Materials . . . . . . . . . . . . . . . . . . . . 221
Pressure-Relief
Device Settings. . . . . . . . . . . . . . . 221
1107.1 General. . . . . . . . . . . . . . . . . . . . . 217 1112.11 Discharge from
1108.0 Refrigeration Machinery Room Pressure-Relief Devices . . . . . . . . 221
Equipment and Controls . . . . . . . . 217 1112.12 Discharge Piping . . . . . . . . . . . . . 222
1108.1 General. . . . . . . . . . . . . . . . . . . . . 217 Table 1112.12.3 Atmospheric Pressure at
1108.2 Electrical . . . . . . . . . . . . . . . . . . . . 217 Nominal Installation
1108.3 Emergency Shut-off . . . . . . . . . . . 217 Elevation. . . . . . . . . . . . . . . . . . . . 222
1108.4 Installation, Maintenance,
and Testing. . . . . . . . . . . . . . . . . . 218
1112.13 Rating of Pressure-
Relief Device . . . . . . . . . . . . . . . . 223
1108.5 Emergency Pressure
Control System . . . . . . . . . . . . . . . 218
1112.14 Rating of Rupture
Members and Fusible Plugs . . . . . 223
1109.0 Refrigeration Piping, Containers, 1113.0 Overpressure Protection. . . . . . . . 223
and Valves . . . . . . . . . . . . . . . . . . 218 1113.1 General. . . . . . . . . . . . . . . . . . . . . 223
1109.1 Materials . . . . . . . . . . . . . . . . . . . . 218 1113.2 Type of Protection . . . . . . . . . . . . 223

2019 CALIFORNIA MECHANICAL CODE xxxv

1113.3 Discharging Into 1123.0 Location . . . . . . . . . . . . . . . . . . . . 226
Lowside of System . . . . . . . . . . . . 223 1123.1 General. . . . . . . . . . . . . . . . . . . . . 226
1113.4
1113.5
Table 1113.5
1113.6
1114.0
Parallel Pressure-Relief
Devices. . . . . . . . . . . . . . . . . . . . . 223
Discharge Capacity . . . . . . . . . . . 223
Relief Devices
Capacity Factor . . . . . . . . . . . . . . 224
Three-Way Valve . . . . . . . . . . . . . 224
Special Discharge
Requirements . . . . . . . . . . . . . . . . 224
1124.0
1124.1
1125.0
1125.1
1126.0
1126.1
Electrical . . . . . . . . . . . . . . . . . . . . 227
General. . . . . . . . . . . . . . . . . . . . . 227
Refrigerants and Hazardous
Fluids . . . . . . . . . . . . . . . . . . . . . . 227
General. . . . . . . . . . . . . . . . . . . . . 227
Drift Eliminators . . . . . . . . . . . . . . 227
General. . . . . . . . . . . . . . . . . . . . . 227
1114.1
1114.2
1114.3
General. . . . . . . . . . . . . . . . . . . . . 224
Design Requirements . . . . . . . . . . 224
Testing . . . . . . . . . . . . . . . . . . . . . 224
Table 1102.3
Table 1104.1
Refrigerant Groups, Properties,
and Allowable Quantities . . . . . . . 228
Permissible Refrigeration
Systems . . . . . . . . . . . . . . . . . . . . 233
1115.0 Labeling and Identification . . . . . . 224
1115.1
1115.2
1115.3
1115.4
1116.0
General. . . . . . . . . . . . . . . . . . . . . 224
Volume and Type . . . . . . . . . . . . . 224
Permanent Sign . . . . . . . . . . . . . . 224
Marking of Pressure-
Relief Devices. . . . . . . . . . . . . . . . 224
Testing of Refrigeration
CHAPTER 12
1201.0
1201.1
1201.2
1201.3
HYDRONICS . . . . . . . . . . . . . . . . 235
General. . . . . . . . . . . . . . . . . . . . . 237
Applicability. . . . . . . . . . . . . . . . . . 237
Insulation . . . . . . . . . . . . . . . . . . . 237
Water Hammer . . . . . . . . . . . . . . 237
Equipment . . . . . . . . . . . . . . . . . . 225 1201.4 Terminal Units . . . . . . . . . . . . . . . 237
1116.1 Factory Tests . . . . . . . . . . . . . . . . 225 1201.5 Return-Water Low-
1116.2
Table 1116.2
1116.3
1116.4
1116.5
1117.0
Field Tests . . . . . . . . . . . . . . . . . . 225
Field Leak Test Pressures . . . . . . 225
Test Gases . . . . . . . . . . . . . . . . . . 225
Declaration . . . . . . . . . . . . . . . . . . 226
Brine Systems . . . . . . . . . . . . . . . 226
Refrigerant-Containing
Pressure Vessels . . . . . . . . . . . . . 226
1202.0
1202.1
1202.2
1202.3
1203.0
Temperature Protection . . . . . . . . 237
Protection of Potable
Water Supply . . . . . . . . . . . . . . . . 237
Prohibited Sources . . . . . . . . . . . . 237
Chemical Injection . . . . . . . . . . . . 237
Compatibility . . . . . . . . . . . . . . . . . 237
Capacity of Heat Source. . . . . . . . 237
1117.1 Inside Dimensions 1203.1 Heat Source . . . . . . . . . . . . . . . . . 237
6 inches or Less . . . . . . . . . . . . . . 226 1203.2 Dual Purpose Water Heater . . . . . 237
1117.2 Inside Dimensions More Table 1203.2 Water Heaters . . . . . . . . . . . . . . . 237
than 6 inches . . . . . . . . . . . . . . . . 226 1203.3 Tankless Water Hater . . . . . . . . . 237
1117.3 Pressure Vessels for
15 psig or Less . . . . . . . . . . . . . . . 226
1204.0 Identification of a Potable
and Nonpotable Water
1118.0 Maintenance and Operation . . . . . 226 System . . . . . . . . . . . . . . . . . . . . . 237
1118.1 General. . . . . . . . . . . . . . . . . . . . . 226 1204.1 General. . . . . . . . . . . . . . . . . . . . . 237
Part II Cooling Towers. . . . . . . . . . . . . . 226 1204.2 Color and Information . . . . . . . . . . 237
1119.0 General. . . . . . . . . . . . . . . . . . . . . 226 1204.3 Potable Water. . . . . . . . . . . . . . . . 237
1119.1 Applicability. . . . . . . . . . . . . . . . . . 226 1204.4 Nonpotable Water. . . . . . . . . . . . . 237
1120.0 Support and Anchorage . . . . . . . . 226 Table 1204.3 Minimum Length of Color
1120.1 General. . . . . . . . . . . . . . . . . . . . . 226 Field and Size of Letters. . . . . . . . 238
1121.0 Drainage . . . . . . . . . . . . . . . . . . . . 226 1204.5 Location of Piping
1121.1 General. . . . . . . . . . . . . . . . . . . . . 226 Identification . . . . . . . . . . . . . . . . . 238
1122.0 Chemical Treatment 1204.6 Flow Directions . . . . . . . . . . . . . . . 238
Systems . . . . . . . . . . . . . . . . . . . . 226 1205.0 Installation, Testing,
1122.1 General. . . . . . . . . . . . . . . . . . . . . 226 and Inspection . . . . . . . . . . . . . . . 238
1122.2 Automated Control of 1205.1 Operating Instructions . . . . . . . . . 238
Cycles of Concentration . . . . . . . . 226 1205.2 Pressure Testing . . . . . . . . . . . . . 238

xxxvi 2019 CALIFORNIA MECHANICAL CODE

1205.3 Flushing . . . . . . . . . . . . . . . . . . . . 238 1211.10 Polyethylene of Raised
1206.0 Pressure and Safety Temperature (PE-RT). . . . . . . . . . 242
Devices. . . . . . . . . . . . . . . . . . . . . 238 1211.11 Polypropylene (PP) Pipe. . . . . . . . 243
1206.1 General. . . . . . . . . . . . . . . . . . . . . 238 1211.12 Polyvinyl Chloride (PVC) Pipe . . . 243
1206.2 Discharge Piping . . . . . . . . . . . . . 238 1211.13 Steel Pipe and Tubing . . . . . . . . . 243
1207.0 Heating Appliances
and Equipment . . . . . . . . . . . . . . . 238
1211.14 Joints Between
Various Materials . . . . . . . . . . . . . 243
1207.1 General. . . . . . . . . . . . . . . . . . . . . 238 1212.0 Valves. . . . . . . . . . . . . . . . . . . . . . 243
1207.2 Boilers. . . . . . . . . . . . . . . . . . . . . . 238 1212.1 General. . . . . . . . . . . . . . . . . . . . . 243
1207.3 Dual-Purpose Water Heaters . . . . 238 1212.2 Where Required . . . . . . . . . . . . . . 243
1207.4
1208.0
Solar Heat Collector
Systems . . . . . . . . . . . . . . . . . . . . 239
Circulators and Pumps . . . . . . . . . 239
1212.3
1212.4
Heat Exchanger . . . . . . . . . . . . . . 243
Pressure Vessels . . . . . . . . . . . . . 243
1208.1
1208.2
1208.3
1209.0
1209.1
1209.2
1209.3
General. . . . . . . . . . . . . . . . . . . . . 239
Mounting. . . . . . . . . . . . . . . . . . . . 239
Sizing . . . . . . . . . . . . . . . . . . . . . . 239
Expansion Tanks . . . . . . . . . . . . . 239
General. . . . . . . . . . . . . . . . . . . . . 239
Installation . . . . . . . . . . . . . . . . . . 239
Open-Type
Expansion Tanks . . . . . . . . . . . . . 239
1212.5
1212.6
1212.7
1212.8
1212.9
1212.10
Pressure Reducing Valves . . . . . . 243
Equipment, Components,
and Appliances . . . . . . . . . . . . . . . 244
Expansion Tank . . . . . . . . . . . . . . 244
Flow Balancing Valves . . . . . . . . . 244
Mixing or Temperature
Control Valves . . . . . . . . . . . . . . . 244
Thermosiphoning . . . . . . . . . . . . . 244
1209.4
1209.5
1210.0
1210.1
1210.2
1210.3
1210.4
1211.0
1211.1
1211.2
Closed-Type Tanks . . . . . . . . . . . 239
Sizing . . . . . . . . . . . . . . . . . . . . . . 239
Materials . . . . . . . . . . . . . . . . . . . . 239
Piping, Tubing, and Fittings . . . . . 239
Expansion and Contraction . . . . . . 239
Hangers and Supports . . . . . . . . . 239
Oxygen Diffusion Corrosion . . . . . 239
Joints and Connections . . . . . . . . 239
General. . . . . . . . . . . . . . . . . . . . . 239
Chlorinated Polyvinyl Chloride
1212.11
1213.0
1213.1
1213.2
1213.3
1214.0
1214.1
1214.2
Air Removal Device
or Air Vents. . . . . . . . . . . . . . . . . . 244
System Controls . . . . . . . . . . . . . . 244
Water Temperature
Controls . . . . . . . . . . . . . . . . . . . . 244
Operating Steam Controls . . . . . . 244
Occupied Spaces . . . . . . . . . . . . . 244
Pressure and Flow Controls . . . . . 244
Balancing . . . . . . . . . . . . . . . . . . . 244
Low-Water Control . . . . . . . . . . . . 244
(CPVC) Pipe . . . . . . . . . . . . . . . . . 239 1214.3 Flow-Sensing Devices . . . . . . . . . 244
Table 1210.1 Materials for Hydronic 1214.4 Automatic Makeup Fluid . . . . . . . . 244
System Piping, Tubing,
and Fittings . . . . . . . . . . . . . . . . . . 240
1214.5 Differential Pressure
Regulation . . . . . . . . . . . . . . . . . . 244
1211.3
1211.4
CPVC/AL/CPVC Plastic
Pipe and Joints . . . . . . . . . . . . . . . 241
Copper or Copper Alloy
Pipe and Tubing . . . . . . . . . . . . . . 241
1214.6
1214.7
1214.8
Air-Removal Device . . . . . . . . . . . 244
Air-Separation Device. . . . . . . . . . 244
Secondary Loops . . . . . . . . . . . . . 244
1211.5 Crossed-Linked Polyethylene 1215.0 Hydronic Space Heating. . . . . . . . 244
(PEX) Pipe . . . . . . . . . . . . . . . . . . 241 1215.1 General. . . . . . . . . . . . . . . . . . . . . 244
1211.6 Cross-Linked Polyethylene/ 1215.2 Installation . . . . . . . . . . . . . . . . . . 244
Aluminum/Cross-Linked
Polyethylene (PEX-AL-PEX)
Pipe . . . . . . . . . . . . . . . . . . . . . . . . 242
1215.3
1215.4
Freeze Protection . . . . . . . . . . . . . 245
Balancing . . . . . . . . . . . . . . . . . . . 245
1211.7 Ductile Iron Pipe . . . . . . . . . . . . . . 242 1215.5 Heat Transfer Fluid. . . . . . . . . . . . 245
1211.8 Polyethylene (PE) 1216.0 Steam Systems . . . . . . . . . . . . . . 245
Plastic Pipe/Tubing. . . . . . . . . . . . 242 1216.1 Steam Traps . . . . . . . . . . . . . . . . . 245
1211.9 Polyethylene/Aluminum/ 1216.2 Sloping for Two-Pipe
Polyethylene (PE-AL-PE) . . . . . . . 242 System . . . . . . . . . . . . . . . . . . . . . 245

2019 CALIFORNIA MECHANICAL CODE xxxvii

1302.3 Applications . . . . . . . . . . . . . . . . . 251
1303.0 Inspection . . . . . . . . . . . . . . . . . . . 251
1303.1 Inspection Notification . . . . . . . . . 251
1303.2 Excavation . . . . . . . . . . . . . . . . . . 251
1303.3 Type of Inspections . . . . . . . . . . . 251
1303.4 Inspection Waived . . . . . . . . . . . . 252
1304.0 Certificate of Inspection . . . . . . . . 252
1304.1 Issuance . . . . . . . . . . . . . . . . . . . . 252
1304.2 Gas Supplier. . . . . . . . . . . . . . . . . 252
1304.3 Unlawful . . . . . . . . . . . . . . . . . . . . 252
1305.0 Authority to Render Gas
Service . . . . . . . . . . . . . . . . . . . . . 252
1305.1 Authorized Personnel . . . . . . . . . . 252
1305.2 Outlets . . . . . . . . . . . . . . . . . . . . . 252
1306.0 Authority to Disconnect. . . . . . . . . 252
1306.1 Disconnection . . . . . . . . . . . . . . . . 252
1306.2 Notice . . . . . . . . . . . . . . . . . . . . . . 252
1306.3 Capped Outlets. . . . . . . . . . . . . . . 252
1307.0 Temporary Use of Gas . . . . . . . . . 252
1307.1 General. . . . . . . . . . . . . . . . . . . . . 252
1308.0 Gas Piping System Design,
Materials, and Components . . . . . 252
1308.1 Installation of Piping System . . . . 252
1308.2 Provision for Location of
Point of Delivery . . . . . . . . . . . . . . 252
1308.3 Interconnections Between Gas
Piping Systems. . . . . . . . . . . . . . . 252
1308.4 Sizing of Gas Piping
Systems . . . . . . . . . . . . . . . . . . . . 253
1308.5 Acceptable Piping Materials
and Joining Methods . . . . . . . . . . 253
Table 1308.4.1 Approximate Gas Input for
Typical Appliances . . . . . . . . . . . . 253
Table 1308.5.7.2 Specifications for Threading
Metallic Pipe . . . . . . . . . . . . . . . . . 254
1308.6 Gas Meters . . . . . . . . . . . . . . . . . . 256
1308.7 Gas Pressure Regulators . . . . . . . 256
1308.8 Overpressure Protection. . . . . . . . 257
1308.9 Pressure Limitation
Requirements . . . . . . . . . . . . . . . . 257
1308.10 Backpressure Protection . . . . . . . 257
1308.11 Low-Pressure Protection . . . . . . . 258
1308.12 Shutoff Valves . . . . . . . . . . . . . . . 258
1308.13 Expansion and Flexibility . . . . . . . 258
1309.0 Excess Flow Valve . . . . . . . . . . . . 258
1309.1 General. . . . . . . . . . . . . . . . . . . . . 258
1310.0 Gas Piping Installation . . . . . . . . . 258
1310.1 Piping Underground . . . . . . . . . . . 258
1216.3 Sloping for One-Pipe
System . . . . . . . . . . . . . . . . . . . . . 245
1216.4 Automatic Air Vents . . . . . . . . . . . 245
1216.5 Condensate Flow . . . . . . . . . . . . . 245
1216.6 Steam-Distribution Piping . . . . . . . 245
1217.0
1217.1
1217.2
Radiant Heating and
Cooling . . . . . . . . . . . . . . . . . . . . . 245
Installation . . . . . . . . . . . . . . . . . . 245
Radiant Under-Floor
Heating . . . . . . . . . . . . . . . . . . . . . 245
1217.3 Radiant Cooling Systems . . . . . . . 245
1217.4
Table 1217.4
Tube Placement . . . . . . . . . . . . . . 245
Maximum Length of Continuous
Tubing from a Supply-and-Return
Manifold Arrangement . . . . . . . . . 245
1217.5 Poured Floor Structural
Concrete Slab Systems
(Thermal Mass) . . . . . . . . . . . . . . 245
1217.6 Radiant Heating
and Cooling Panels . . . . . . . . . . . 246
1218.0 Heat Exchangers . . . . . . . . . . . . . 246
1218.1
1219.0
General. . . . . . . . . . . . . . . . . . . . . 246
Indirect-Fired Domestic
Hot-Water Storage Tanks. . . . . . . 246
1219.1
1220.0
1220.1
1220.2
Table 1220.2.1
General. . . . . . . . . . . . . . . . . . . . . 246
Auxiliary Systems . . . . . . . . . . . . . 247
Use of Chemical
Additives and
Corrosive Fluids . . . . . . . . . . . . . . 247
Snow and Ice Melt Controls . . . . . 247
Loop Lengths for Snow and
Ice Melt Systems . . . . . . . . . . . . . 247
1220.3 Hydronic Makeup
Air Units . . . . . . . . . . . . . . . . . . . . 247
1221.0
1221.1
Piping Installation . . . . . . . . . . . . . 247
General. . . . . . . . . . . . . . . . . . . . . 247
1221.2 Embedded Piping Materials
and Joints . . . . . . . . . . . . . . . . . . . 247
1221.3
1221.4
Pressure Testing . . . . . . . . . . . . . 248
System Drainage . . . . . . . . . . . . . 248
1221.5 Condensate Drainage. . . . . . . . . . 248
1221.6 Clearance to Combustibles . . . . . 248
CHAPTER 13 FUEL GAS PIPING . . . . . . . . . . . 249
1301.0 Scope of Gas Piping . . . . . . . . . . 251
1301.1 Applicability. . . . . . . . . . . . . . . . . . 251
1302.0 Coverage of Piping System . . . . . 251
1302.1 General. . . . . . . . . . . . . . . . . . . . . 251
1302.2 Piping System Requirements . . . . 251

xxxviii 2019 CALIFORNIA MECHANICAL CODE

1310.2 Installation of Piping . . . . . . . . . . . 259 1313.3 Test Pressure . . . . . . . . . . . . . . . . 266
Table 1310.2.4.1 Support of Piping . . . . . . . . . . . . . 260 1313.4 Detection of Leaks and
1310.3 Concealed Piping in Buildings . . . 260 Defects . . . . . . . . . . . . . . . . . . . . . 267
1310.4 Piping in Vertical Chases . . . . . . . 261 1313.5 Piping System Leak Test . . . . . . . 267
1310.5 Maximum Design Operating 1313.6 Purging Requirements . . . . . . . . . 267
Pressure . . . . . . . . . . . . . . . . . . . . 261 Table 1313.6.1 Size and Length of Piping. . . . . . . 267
1310.6 Appliance Overpressure 1314.0 Required Gas Supply . . . . . . . . . . 268
1310.7
1310.8
1310.9
1310.10
1310.11
1310.12
1310.13
Protection . . . . . . . . . . . . . . . . . . . 261
Gas Pipe Turns. . . . . . . . . . . . . . . 261
Drips and Sediment Traps . . . . . . 262
Outlets . . . . . . . . . . . . . . . . . . . . . 262
Branch Pipe Connection. . . . . . . . 262
Manual Gas Shutoff Valves . . . . . 262
Prohibited Devices . . . . . . . . . . . . 262
Systems Containing Gas-Air
Mixtures Outside the Flammable
1314.1
1314.2
1314.3
1314.4
1315.0
1315.1
1315.2
General. . . . . . . . . . . . . . . . . . . . . 268
Volume . . . . . . . . . . . . . . . . . . . . . 268
Gas Appliances . . . . . . . . . . . . . . 268
Size of Piping Outlets . . . . . . . . . . 268
Required Gas Piping Size . . . . . . 268
Pipe Sizing Methods. . . . . . . . . . . 268
Tables for Sizing Gas Piping
Systems . . . . . . . . . . . . . . . . . . . . 269
Range . . . . . . . . . . . . . . . . . . . . . . 263 1315.3 Sizing Equations. . . . . . . . . . . . . . 269
1310.14 Systems Containing Flammable Table 1315.3 Cr andY for Natural Gas and
Gas-Air Mixtures. . . . . . . . . . . . . . 263 Undiluted Propane at Standard
1311.0 Electrical Bonding and Conditions. . . . . . . . . . . . . . . . . . . 269
Grounding. . . . . . . . . . . . . . . . . . . 264 1315.4 Sizing of Piping Sections . . . . . . . 269
1311.1
1311.2
1311.3
Pipe and Tubing other
than CSST . . . . . . . . . . . . . . . . . . 264
Bonding of CSST Gas Piping . . . . 264
Grounding Conductor
of Electrode . . . . . . . . . . . . . . . . . 264
1315.5
1315.6
Table 1315.2(1)
Table 1315.2(2)
Engineering Methods . . . . . . . . . . 269
Variable Gas Pressures . . . . . . . . 269
Schedule 40 Metallic Pipe . . . . . . 271
Schedule 40 Metallic Pipe . . . . . . 272
1311.4 Lightning Protection System. . . . . 264 Table 1315.2(3) Schedule 40 Metallic Pipe . . . . . . 273
1311.5 Electrical Circuits . . . . . . . . . . . . . 264 Table 1315.2(4) Schedule 40 Metallic Pipe . . . . . . 274
1311.6 Electrical Connections . . . . . . . . . 264 Table 1315.2(5) Schedule 40 Metallic Pipe . . . . . . 275
1312.0 Appliance Connections to Table 1315.2(6) Schedule 40 Metallic Pipe . . . . . . 276
Building Piping . . . . . . . . . . . . . . . 264 Table 1315.2(7) Semi-Rigid Copper Tubing . . . . . . 277
1312.1
1312.2
Connecting Appliances and
Equipment . . . . . . . . . . . . . . . . . . 264
Suspended Low-Intensity
Infrared Tube Heaters . . . . . . . . . 264
Table 1315.2(8)
Table 1315.2(9)
Table 1315.2(10)
Semi-Rigid Copper Tubing . . . . . . 278
Semi-Rigid Copper Tubing . . . . . . 279
Semi-Rigid Copper Tubing . . . . . . 280
1312.3 Use of Gas Hose Connectors. . . . 265 Table 1315.2(11) Semi-Rigid Copper Tubing . . . . . . 281
1312.4 Injection (Bunsen) Burners . . . . . . 265 Table 1315.2(12) Semi-Rigid Copper Tubing . . . . . . 282
1312.5 Connection of Portable and Table 1315.2(13) Semi-Rigid Copper Tubing . . . . . . 283
Mobile Industrial Appliances. . . . . 265 Table 1315.2(14) Corrugated Stainless Steel
1312.6 Appliance Shutoff Valves Tubing (CSST) . . . . . . . . . . . . . . . 284
and Connections. . . . . . . . . . . . . . 265 Table 1315.2(15) Corrugated Stainless Steel
1312.7 Quick-Disconnect Devices . . . . . . 265 Tubing (CSST) . . . . . . . . . . . . . . . 285
1312.8 Gas Convenience Outlets. . . . . . . 265 Table 1315.2(16) Corrugated Stainless Steel
1312.9 Sediment Trap . . . . . . . . . . . . . . . 265 Tubing (CSST) . . . . . . . . . . . . . . . 286
1312.10 Installation of Piping . . . . . . . . . . . 266 Table 1315.2(17) Corrugated Stainless Steel
1312.11 Liquefied Petroleum Gas Tubing (CSST) . . . . . . . . . . . . . . . 287
Facilities and Piping . . . . . . . . . . . 266 Table 1315.2(18) Corrugated Stainless Steel
1313.0 Pressure Testing Tubing (CSST) . . . . . . . . . . . . . . . 288
and Inspection . . . . . . . . . . . . . . . 266 Table 1315.2(19) Polyethylene Plastic Pipe . . . . . . . 289
1313.1 Piping Installations . . . . . . . . . . . . 266 Table 1315.2(20) Polyethylene Plastic Pipe . . . . . . . 290
1313.2 Test Preparation . . . . . . . . . . . . . . 266 Table 1315.2(21) Polyethylene Plastic Pipe . . . . . . . 291

2019 CALIFORNIA MECHANICAL CODE xxxix

1601.1 General. . . . . . . . . . . . . . . . . . . . . 317
1602.0 Stationary Gas Engines
and Generators. . . . . . . . . . . . . . . 317
1602.1 General. . . . . . . . . . . . . . . . . . . . . 317
1602.2 Connection to the
Gas Supply Piping . . . . . . . . . . . . 317
1602.3 Stationary Engine
Generators . . . . . . . . . . . . . . . . . . 317
CHAPTER 17 REFERENCED STANDARDS . . . 319
1701.0 General. . . . . . . . . . . . . . . . . . . . . 321
1701.1 Standards . . . . . . . . . . . . . . . . . . . 321
Table 1701.1 Referenced Standards . . . . . . . . . 321
1701.2 Standards, Publications
Practices, and Guides . . . . . . . . . 332
Table 1701.2 Standards, Publications
Practices, and Guides . . . . . . . . . 332
Table 1315.2(22) Polyethylene Plastic Tubing . . . . . 292
Table 1315.2(23) Polyethylene Plastic Tubing . . . . . 292
Table 1315.2(24) Schedule 40 Metallic Pipe . . . . . . 293
Table 1315.2(25) Schedule 40 Metallic Pipe . . . . . . 294
Table 1315.2(26)
Table 1315.2(27)
Table 1315.2(28)
Schedule 40 Metallic Pipe . . . . . . 295
Schedule 40 Metallic Pipe . . . . . . 296
Semi-Rigid Copper Tubing . . . . . . 297
Table 1315.2(29) Semi-Rigid Copper Tubing . . . . . . 298
Table 1315.2(30) Semi-Rigid Copper Tubing . . . . . . 299
Table 1315.2(31) Corrugated Stainless Steel
Tubing (CSST) . . . . . . . . . . . . . . . 300
Table 1315.2(32) Corrugated Stainless Steel
Tubing (CSST) . . . . . . . . . . . . . . . 301
Table 1315.2(33) Corrugated Stainless Steel
Tubing (CSST) . . . . . . . . . . . . . . . 302
Table 1315.2(34) Polyethylene Plastic Pipe . . . . . . . 303
Table 1315.2(35) Polyethylene Plastic Pipe . . . . . . . 304
Table 1315.2(36) Polyethylene Plastic Tubing . . . . . 305
APPENDICES TABLE OF CONTENTS. . . . . . . . 337
Appendix A Residential Plan Examiner
Appendix B Review Form for HVAC
System Design . . . . . . . . . . . . . . . 339
Procedures to be Followed
to Place Gas Equipment in
Operation . . . . . . . . . . . . . . . . . . . 343
Appendix C Installation and
Testing of Oil (Liquid)
Fuel-Fired Equipment . . . . . . . . . . 347
Appendix D Fuel Supply:
Appendix E Manufactured/Mobile
Home Parks and
Recreational Vehicle Parks . . . . . 355
Sustainable Practices . . . . . . . . . . 363
Appendix F Sizing of Venting
Systems and Outdoor
Combustion and
Ventilation Opening
Design . . . . . . . . . . . . . . . . . . . . . 473
Appendix G Example Calculation of
Outdoor Air Rate. . . . . . . . . . . . . . 485
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . 489
HISTORY NOTE
APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
CHAPTER 14 PROCESS PIPING. . . . . . . . . . . . 307
1401.0 General. . . . . . . . . . . . . . . . . . . . . 309
1401.1 Applicability. . . . . . . . . . . . . . . . . . 309
1402.0 Permit . . . . . . . . . . . . . . . . . . . . . . 309
1402.1 General. . . . . . . . . . . . . . . . . . . . . 309
1403.0 Plans Required . . . . . . . . . . . . . . . 309
1403.1 General. . . . . . . . . . . . . . . . . . . . . 309
1404.0 Workmanship . . . . . . . . . . . . . . . . 309
1404.1 General. . . . . . . . . . . . . . . . . . . . . 309
1405.0 Inspections . . . . . . . . . . . . . . . . . . 309
1405.1 General. . . . . . . . . . . . . . . . . . . . . 309
1405.2 Required Inspections . . . . . . . . . . 309
1405.3 Other Inspections . . . . . . . . . . . . . 309
1406.0 Pipe, Tubing, and Fittings. . . . . . . 309
1406.1 General. . . . . . . . . . . . . . . . . . . . . 309
1406.2 Hazardous Process
Piping (HPP). . . . . . . . . . . . . . . . . 309
1406.3 Special Requirements for HPP
Gases . . . . . . . . . . . . . . . . . . . . . . 310
CHAPTER 15 SOLAR ENERGY SYSTEMS. . . . 311
1501.0 General. . . . . . . . . . . . . . . . . . . . . 313
1501.1 Applicability. . . . . . . . . . . . . . . . . . 313
1502.0 General. . . . . . . . . . . . . . . . . . . . . 313
CHAPTER 16 STATIONARY POWER
PLANTS . . . . . . . . . . . . . . . . . . . . 315
1601.0 Stationary Fuel Cell
Power Plants . . . . . . . . . . . . . . . . 317

xl 2019 CALIFORNIA MECHANICAL CODE

CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

CHAPTER 1 – ADMINISTRATION (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting Agency BSC BSC-
CG
SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
Adopting Agency
**BSC ** BSC-
CG
SFM 1 2 1-AC **AC ** SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
Adopt Entire Chapter

Adopt Entire Chapter as
amended (amended sections
listed below)

Adopt only those sections
that are listed below
X X **X ** X X X X **X ** **X ** X

Chapter/Section
1.1.0
X
X
**X **
X
X
X
X
**X **
**X **
X
1.1.1
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.2
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.3
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.3.1
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.3.2
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.4
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.5
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.6
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.7
X
X

**X **

X
X
X
X
**X **

**X **

X
1.1.7.1
X
X

**X **

X
X
X
1.1.7.2
X
X

**X **

X
X
X
1.1.7.3
X
X

**X **

X
X
X
1.1.8
X
X
**X **

X
X
X
X
**X **
**X **
X
1.1.9
X
**X **

X
X X X
**X **

**X **

X
1.1.9 Exception

**X **

X




1.1.10
X
X

**X **

X
X
X
X
**X **
**X **
X
1.1.11
X
X

**X **

X
X
X
X

**X **

**X **

X
1.1.12
X
X
**X **

X
X X X
**X **

**X **

X
1.2.0 and 1.2.1.4
X

1.2.2
X
1.2.3
X
1.8.0 – 1.8.10 and subsec-
tions
**X ** X
1.9.0
X X
1.9.1
X
1.9.2
X
X
1.9.2.1 & 1.9.2.1.1
X

1.9.2.2 & 1.9.2.2.1
X

1.10.1 and subsections
**X ** X

1.10.2 and subsections
X

1.10.3 and subsections
X

1.10.4 and subsections
X

1.10.5 and subsections
X

1.11.0
X

2019 CALIFORNIA MECHANICAL CODE 1

CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

CHAPTER 1 – ADMINISTRATION (continued) (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting Agency BSC BSC-
CG
SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
Adopting Agency
**BSC ** BSC-
CG
SFM 1 2 1-AC **AC ** SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
Adopt Entire Chapter

Adopt Entire Chapter as
amended (amended sections
listed below)

Adopt only those sections
that are listed below
X X **X ** X X X X **X ** **X ** X

Chapter/Section

Division II –
Administration
101.0 – 104.1
**X ** **X ** **X ** **X ** **X ** X

104.2 (Items 1 – 5)
**X ** X





104.3 – 107.0


X **X ** **X ** X

The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.

2 2019 CALIFORNIA MECHANICAL CODE

CHAPTER 1

ADMINISTRATION

DIVISION I CALIFORNIA ADMINISTRATION

1.1.0 General. 1.1.1 Title. These regulations shall be known as the California Mechanical Code, may be cited as such and will be referred to herein as “this code.” The California Mechanical Code is Part 4 of thirteen parts of the official compilation and publi- cation of the adoption, amendment, and repeal of mechanical regulations to the California Code of Regulations, Title 24, also referred to as the California Building Standards Code. This part incorporates by adoption the 2018 Uniform Mechan- ical Code of the International Association of Plumbing and Mechanical Officials with necessary California amendments. 1.1.2 Purpose. The purpose of this code is to establish the minimum requirements to safeguard the public health, safety and general welfare through structural strength, means of egress facilities, stability, access to persons with disabilities, sanitation, adequate lighting and ventilation, and energy conservation; safety to life and property from fire and other hazards attributed to the built environment; and to provide safety to fire fighters and emergency responders during emer- gency operations. 1.1.3 Scope. The provisions of this code shall apply to the construction, alteration, movement, enlargement, replace- ment, repair, equipment, use and occupancy, location, main- tenance, removal, and demolition of every building or structure or any appurtenances connected or attached to such buildings or structures throughout the State of California.

Regents of the University of California, and regu- lated by the Building Standards Commission. See Section 1.2.0 for additional scope provisions. (2) Section 1.3.0 is reserved for the Board of State and

Community Corrections.

(2) Section 1.3.0 is reserved for the Board of State and

Community Corrections. (3) Section 1.4.0 is reserved for the Department of

Consumer Affairs.

(3) Section 1.4.0 is reserved for the Department of

Consumer Affairs. (4) Section 1.5.0 is reserved for the California Energy

Commission.

(4) Section 1.5.0 is reserved for the California Energy

Commission. (5) Section 1.6.0 is reserved for the Department of Food

and Agriculture.

(5) Section 1.6.0 is reserved for the Department of Food

and Agriculture. (6) Organized camps, laboratory animal quarters,

public swimming pools, radiation protection,

(6) Organized camps, laboratory animal quarters,

public swimming pools, radiation protection, commissaries serving mobile food preparation vehi- cles, and wild animal quarantine facilities regulated by the Department of Public Health. See Section 1.7.0 for additional scope provisions. (7) Hotels, motels, lodging houses, apartments,

dwellings, dormitories, condominiums, shelters for

1.1.3.1 Nonstate-Regulated Buildings, Structures, and Applications. Except as modified by local ordinance pursuant to Section 1.1.8, the following standards in the California Code of Regulations, Title 24, Parts 2, 2.5, 3, 4, 5, 6, 9, 10 and 11 shall apply to all occupancies and applications not regulated by a state agency. 1.1.3.2 State-Regulated Buildings, Structures, and Applications. The model code, state amendments to the model code, and/or state amendments where there are no relevant model code provisions shall apply to the following buildings, structures, and applications regu- lated by state agencies as specified in Sections 1.2.0 through 1.14.0, except where modified by local ordinance pursuant to Section 1.1.8. When adopted by a state agency, the provisions of this code shall be enforced by the appropriate enforcing agency, but only to the extent of authority granted to such agency by the state legislature. Note: See Preface to distinguish the model code provi- sions from the California provisions. (1) State-owned buildings, including buildings constructed by the Trustees of the California State University, and to the extent permitted by California laws, buildings designed and constructed by the

(7) Hotels, motels, lodging houses, apartments,

dwellings, dormitories, condominiums, shelters for homeless persons, congregate residences, employee housing, factory-built housing and other types of dwellings containing sleeping accommodations with or without common toilets or cooking facilities. See Section 1.8.2.1.1 for additional scope provisions. (8) Accommodations for persons with disabilities in

buildings containing newly constructed covered

(8) Accommodations for persons with disabilities in

buildings containing newly constructed covered multifamily dwellings, new common use areas serving existing covered multifamily dwellings, additions to existing buildings where the addition alone meets the definition of covered multifamily dwellings and new common-use areas serving new covered multifamily dwellings which are regulated by the Department of Housing and Community Development. See Section 1.8.2.1.2 for additional scope provisions. (9) Permanent buildings and permanent accessory build-

ings or structures constructed within mobilehome

Board with the Division of the State Architect.

(9) Permanent buildings and permanent accessory build-

ings or structures constructed within mobilehome parks and special occupancy parks regulated by the Department of Housing and Community Development. See Section 1.8.2.1.3 for additional scope provisions. (10)Accommodations for persons with disabilities regu-

lated by the Division of the State Architect. See

(10)Accommodations for persons with disabilities regu-

lated by the Division of the State Architect. See Section 1.9.1 for additional scope provisions. (11) Public elementary and secondary schools, commu-

nity college buildings and state-owned or state-

(11) Public elementary and secondary schools, commu-

nity college buildings and state-owned or state- leased essential service buildings regulated by the Division of the State Architect. See Section 1.9.2 for additional scope provisions. (12)Reserved for the State Historical Building Safety

Board with the Division of the State Architect.

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DIVISION I CALIFORNIA ADMINISTRATION any other purpose or distributed to any other persons or parti es.

(13)General acute care hospitals, acute psychiatric

hospitals, skilled nursing and/or intermediate care

(13)General acute care hospitals, acute psychiatric

hospitals, skilled nursing and/or intermediate care facilities, clinics licensed by the Department of Public Health and correctional treatment centers regulated by the Office of Statewide Health Plan- ning and Development. See Section 1.10.0 for addi- tional scope provisions. (14)Applications regulated by the Office of State Fire

Marshal include but are not limited to the following

ance, outdoor environments and uses shall be clas- sified according to accessibility uses described in Chapters 11A and 11B. (18)Section 1.14.0 is reserved for Marine Oil Terminals

regulated by the California State Lands Commis-

(14)Applications regulated by the Office of State Fire

Marshal include but are not limited to the following in accordance with Section 1.11.0: (1) Buildings or structures used or intended for use

as an:

(1) Buildings or structures used or intended for use

as an: 1.1. Asylum, jail, prison. 1.2. Mental hospital, hospital, home for the elderly, children’s nursery, children’s home or institution, school or any similar occu- pancy of any capacity. 1.3. Theater, dancehall, skating rink, audito- rium, assembly hall, meeting hall, night- club, fair building or similar place of assemblage where 50 or more persons may gather together in a building, room, or structure for the purpose of amusement, entertainment, instruction, deliberation, worship, drinking or dining, awaiting transportation, or education. 1.4. Small family day care homes, large family day-care homes, residential facilities and residential facilities for the elderly, resi- dential care facilities. 1.5. State institutions or other state-owned or state-occupied buildings. 1.6. High rise structures. 1.7. Motion picture production studios. 1.8. Organized camps. 1.9. Residential structures. (2) Tents, awnings, or other fabric enclosures used

in connection with any occupancy.

(2) Tents, awnings, or other fabric enclosures used

in connection with any occupancy. (3) Fire alarm devices, equipment, and systems in

connection with any occupancy.

(3) Fire alarm devices, equipment, and systems in

connection with any occupancy. (4) Hazardous materials, flammable, and combustible liquids. (5) Public school automatic fire detection, alarm,

and sprinkler systems.

(18)Section 1.14.0 is reserved for Marine Oil Terminals

regulated by the California State Lands Commis- sion. 1.1.4 Appendices. Provisions contained in the appendices of this code shall not apply unless specifically adopted by a state agency or adopted by a local enforcing agency in compliance with Health and Safety Code Section 18901 et. seq. for Building Standards Law, Health and Safety Code Section 17950 for State Housing Law and Health and Safety Code Section 13869.7 for Fire Protection Districts. See Section 1.1.8 of this code. 1.1.5 Referenced Codes. The codes, standards and publica- tions adopted and set forth in this code, including other codes, standards, and publications referred to therein are, by title and date of publication, hereby adopted as standard refer- ence documents of this code. When this code does not specif- ically cover any subject related to building design and construction, recognized architectural, or engineering prac- tices shall be employed. The National Fire Codes, standards, and the Fire Protection Handbook of the National Fire Protection Association are permitted to be used as authori- tative guides in determining recognized fire prevention engi- neering practices. 1.1.6 NonBuilding Standards, Orders and Regulations. Requirements contained in the Uniform Mechanical Code, or in any other referenced standard, code or document, which are not building standards as defined in Health and Safety Code Section 18909, shall not be construed as part of the provisions of this code. For nonbuilding standards, orders, and regulations, see other titles of the California Code of Regulations. 1.1.7 Order of Precedence and Use. 1.1.7.1 Differences. In the event of any differences between these building standards and the standard refer- ence documents, the text of these building standards shall govern. 1.1.7.2 Specific Provisions. Where a specific provision varies from a general provision, the specific provision shall apply. 1.1.7.3 Conflicts. When the requirements of this code conflict with the requirements of any other part of the California Building Standards Code, Title 24, the most restrictive requirements shall prevail.

(5) Public school automatic fire detection, alarm,

and sprinkler systems. (6) Wildland-urban interface fire areas. (15)Section 1.12.0 is reserved for public libraries

constructed and renovated using funds from the

(15)Section 1.12.0 is reserved for public libraries

constructed and renovated using funds from the California Library Construction and Renovation Bond Act of 1988 and regulated by the State Librarian. (16)Section 1.13.0 is reserved for the Department of

Water Resources.

(16)Section 1.13.0 is reserved for the Department of

Water Resources. (17)For applications listed in Section 1.9.1 regulated by

the Division of the State Architect – Access Compli-

(17)For applications listed in Section 1.9.1 regulated by

the Division of the State Architect – Access Compli-

1.1.7.3.1 Detached One- and Two-Family Dwellings. Detached one-and two-family dwellings, efficiency dwelling units, lodging houses, live/work units, townhouses not more than three stories above grade plane in height with a separate means of egress, and their accessory structures, shall not be required to comply with the California Residential Code if constructed in accordance with the California Building Code.

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1.1.8 City, County, or City and County Amendments, Additions or Deletions. The provisions of this code do not limit the authority of city, county, or city and county governments to establish more restrictive and reasonably necessary differences to the provisions contained in this code pursuant to complying with Section 1.1.8.1. The effective date of amendments, addi- tions, or deletions to this code by a city, county, or city and county filed pursuant to Section 1.1.8.1 shall be the date filed. However, in no case shall the amendments, additions, or dele- tions to this code be effective any sooner than the effective date of this code.

Local modifications shall comply with Health and Safety Code Section 18941.5 for Building Standards Law, Health and Safety Code Section 17958 for State Housing Law or Health and Safety Code Section 13869.7 for Fire Protection Districts.

1.1.8.1 Findings and Filings. (1) The city, county, or city and county shall make

express findings for each amendment, addition, or

(1) The city, county, or city and county shall make

express findings for each amendment, addition, or deletion based upon climatic, topographical, or geological conditions. Exception: Hazardous building ordinances and programs mitigating unreinforced masonry build- ings. (2) The city, county, or city and county shall file the

amendments, additions or deletions expressly

(2) The city, county, or city and county shall file the

amendments, additions or deletions expressly marked and identified as to the applicable findings. Cities, counties, cities and counties, and fire depart- ments shall file the amendments, additions, or dele- tions, and the findings with the California Building Standards Commission at 2525 Natomas Park Drive, Suite 130, Sacramento, CA 95833. (3) Findings prepared by fire protection districts shall

be ratified by the local city, county, or city and

(3) Findings prepared by fire protection districts shall

be ratified by the local city, county, or city and county and filed with the California Department of Housing and Community Development, Division of Codes and Standards, P.O. Box 278180, Sacra- mento, CA 95827-8180 or 9342 Tech Center Drive, Suite 500, Sacramento, CA, 95826. 1.1.8.2 Locally Adopted Energy Standards – California Energy Code, Part 6. In addition to the provisions of Section 1.1.8.1 of this part, the provisions of this section apply to cities, counties, and cities and counties amending adopted energy standards affecting buildings and struc- tures subject to the California Energy Code, Part 6.

the effective dates of the provisions contained in this code, see the History Note page of this code. Exception: Plans approved by the Department of Housing and Community Development or a Department-approved design approval agency for factory built housing as defined by Health and Safety Code Section 19971. Approved plans, pursuant to the California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, Article 3, Section 3048 remain valid for a period of 36 months from the date of plan approval. 1.1.10 Availability of Codes. At least one complete copy each of Titles 8, 19, 20, 24, and 25 with all revisions shall be main- tained in the office of the building official responsible for the administration and enforcement of this code. Each state department concerned and each city, county, or city and county shall have an up-to-date copy of the code available for public inspection, see Health and Safety Code Section 18942(e)(1) and (2). 1.1.11 Format. This part fundamentally adopts the Uniform Mechanical Code by reference on a chapter-by-chapter basis. When a specific chapter of the Uniform Mechanical Code is not printed in the code and is marked “Reserved”, such chapter of the Uniform Mechanical Code is not adopted as a portion of this code. When a specific chapter of the Uniform Mechanical Code is marked “Not adopted by the State of California” but appears in the code, it may be available for adoption by local ordinance. Note: Matrix Adoption Tables at the front of each chapter may aid the code user in determining which chapter or sections within a chapter are applicable to buildings under the authority of a specific state agency, but they are not to be considered regulatory. 1.1.12 Validity. If any chapter, section, subsection, sentence, clause, or phrase of this code is for any reason held to be unconstitutional, contrary to statute, exceeding the authority of the state as stipulated by statutes or otherwise inoperative, such decision shall not affect the validity of the remaining portion of this code.

1.2.0 Building Standards Commission. 1.2.1 BSC. Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated. (1) State Buildings for All Occupancies.

Application – State buildings (all occupancies), including buildings constructed by the Trustees of the California State University (CSU) and the Regents of the University of California (UC) where no state agency has the authority to adopt building standards applicable to such buildings. Enforcing Agency – State or local agency specified by the applicable provisions of law. Authority Cited – Health and Safety Code Section 18934.5. Reference – Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901.

Applicable provisions of Public Resources Code Section 25402.1 and applicable provisions of Chapter 10 of the California Administrative Code, Part 1 apply to local amendment of energy standards adopted by the California Energy Commission. 1.1.9 Effective Date of This Code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For

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DIVISION I CALIFORNIA ADMINISTRATION any other purpose or distributed to any other persons or parti es.

(2) University of California, California State Universities,

and California Community Colleges.

(2) University of California, California State Universities,

and California Community Colleges. Application – Standards for lighting for parking lots and primary campus walkways at the University of Cali- fornia, California State Universities, and California Community Colleges. Enforcing Agency – State or local agency specified by the applicable provisions of law. Authority Cited – Government Code Section 14617. Reference – Government Code Section 14617. (3) Existing State-Owned Buildings, including those

owned by the University of California and by the Cali-

(3) Existing State-Owned Buildings, including those

owned by the University of California and by the Cali- fornia State University – Building seismic retrofit stan- dards including abating falling hazards of structural and nonstructural components and strengthening of building structures. See also Division of the State Architect. Enforcing Agency – State or local agency specified by the applicable provisions of law. Authority Cited – Government Code Section 16600. References – Government Code Sections 16600 through 16604. (4) Unreinforced Masonry Bearing Wall Buildings.

d_ nonstructural components and strengthening of building structures. See also Division of the State Architect. Enforcing Agency – State or local agency specified by the applicable provisions of law. Authority Cited – Government Code Section 16600. References – Government Code Sections 16600 through 16604. (4) Unreinforced Masonry Bearing Wall Buildings.

Application – Minimum seismic strengthening standards for buildings specified in the California Existing Building Code, except for buildings subject to building standards adopted pursuant to Part 1.5 (commencing with Section 17910). Enforcing Agency – State or local agency specified by the applicable provisions of law. Authority Cited – Health and Safety Code Section 18934.7. References – Health and Safety Code Division 13, Part 2.5 commencing with Sections 18901. 1.2.1.1 State Building. For purposes of this code, a “state building” is a structure for which a state agency or state entity has authority to construct, alter, enlarge, replace, repair or demolish. 1.2.1.2 Enforcement. [CSU, UC, Judicial Council and California Department of Corrections Rehabilitation] state agencies or state entities authorized to construct state buildings may appoint a building official who is responsible to the agency for enforcement of the provi- sions of the California Building Standards Code. Exception: State buildings regulated by other sections of this code remain the enforcement responsibility of the designated entities. 1.2.1.3 Enforcement, Reserved for DGS. 1.2.1.4 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym BSC. 1.2.2 BSC-CG. Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

ification._** The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym BSC. 1.2.2 BSC-CG. Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

1. Green Building Standards for Nonresidential Occupancies. Application – All occupancies where no other state agency has the authority to adopt green building standards applicable to those occupancies. Enforcing Agency – State or local agency specified by the applicable provisions of law. Authority Cited – Health and Safety Code Sections 18930.5, 18938 and 18940.5. Reference – Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901. 2. Graywater Systems for Nonresidential Occupancies. Application – The construction, installation, and alteration of graywater systems for indoor and outdoor uses in nonresidential occupancies. Enforcing Agency – State or local agency specified by the applicable provisions of law. Authority Cited – Health & Safety Code Section 18941.8. Reference – Health & Safety Code Section 18941.8. 1.2.3 Alternative Materials, Design, and Methods of Construction and Equipment. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material, design, or method of construction shall be approved where the building official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety.

1.2.3.1 Research Reports. Supporting data, where neces- sary to assist in the approval of materials or assemblies not specifically provided for in this code, shall consist of valid research reports from approved sources. 1.2.3.2 Tests. Whenever there is insufficient evidence of compliance with the provisions of this code, or evidence that a material or method does not conform to the require- ments of this code, or in order to substantiate claims for alternative materials or methods, the building official shall have the authority to require tests as evidence of compli- ance to be made at no expense to the jurisdiction. Test methods shall be as specified in this code or by other recog- nized test standards. In the absence of recognized and accepted test methods, the building official shall approve the testing procedures. Tests shall be performed by an approved agency. Reports of such tests shall be retained by the building official for the period required for retention of public records.

isdiction. Test_ methods shall be as specified in this code or by other recog- nized test standards. In the absence of recognized and accepted test methods, the building official shall approve the testing procedures. Tests shall be performed by an approved agency. Reports of such tests shall be retained by the building official for the period required for retention of public records.

1.3.0 Reserved for Corrections Standards Authority.

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1.4.0 Department of Consumer Affairs. 1.4.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

Board of Pharmacy. Application – Pharmacies. Enforcing Agency – State or local agency specified by applicable provisions of law. Authority Cited – Business and Professions Code Section 4005. References Business and Professions Code Sections 4005, 4127.7, and 4201. 1.4.2 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym CA.

1.5.0 Reserved for California Energy Commission.

1.6.0 Reserved for Department of Food and Agriculture.

1.7.0 California Department of Public Health. 1.7.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

Department of Public Health. Application – Food establishments. Enforcing Agency – Department of Health Services and the local health agency. Authority Cited – Health and Safety Code Sections 110065, 113710, and 131200. References – Health and Safety Code Sections 110065, 113705, 114140, and 131200. 1.7.2 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym DPH.

1.8.0 Department of Housing and Community Development

[HCD]. 1.8.1 Purpose. The purpose of this code is to establish the minimum requirements necessary to protect the health, safety, and general welfare of the occupants and the public by governing the erection, construction, reconstruction, enlarge- ment, conversion, alteration, repair, moving, removal, demo- lition, ventilation, and maintenance or use of heating, ventilating, cooling, refrigeration systems, incinerators, and other miscellaneous heat-producing appliances. 1.8.2 Authority and Abbreviations. 1.8.2.1 General. The Department of Housing and Community Development is authorized by law to prom-

tion, enlarge-_ ment, conversion, alteration, repair, moving, removal, demo- lition, ventilation, and maintenance or use of heating, ventilating, cooling, refrigeration systems, incinerators, and other miscellaneous heat-producing appliances. 1.8.2 Authority and Abbreviations. 1.8.2.1 General. The Department of Housing and Community Development is authorized by law to prom-

ulgate and adopt building standards and regulations for several types of building applications. The applications under the authority of the Department of Housing and Community Development are listed in Sections 1.8.2.1.1 through 1.8.2.1.3.

1.8.2.1.1 Housing Construction. Application – Hotels, motels, lodging houses, apart- ments, dwellings, dormitories, condominiums, shel- ters for homeless persons, congregate residences, employee housing, factory-built housing, and other types of dwellings containing sleeping accommoda- tions with or without common toilet or cooking facil- ities including accessory buildings, facilities, and uses thereto. Sections of this code which pertain to applications listed in this section are identified using the abbreviation “HCD 1”. Enforcing Agency – Local building department or the Department of Housing and Community Devel- opment. Authority Cited – Health and Safety Code Sections 17040, 17050, 17920.9, 17921, 17921.5, 17921.6, 17921.10, 17922, 17922.6, 17922.12, 17922.14, 17926, 17927, 17928, 18300, 18552, 18554, 18620, 18630, 18640, 18670, 18690, 18691, 18865, 18871.3, 18871.4, 18873, 18873.1 through 18873.5, 18938.3, 18944.11, and 19990; and Government Code Section 12955.1. References Health and Safety Code Sections 17000 through 17062.5, 17910 through 17995.5, 18200 through 18700, 18860 through 18874, and 19960 through 19997; Civil Code Sections 1101.4, 1101.5 and 1954.201; and Government Code Sections 12955.1 and 12955.1.1. 1.8.2.1.2 Housing Accessibility. Application Covered multifamily dwellings as defined in Chapter 2 of the California Code of Regu- lations, Title 24, Part 2, also known as the California Building Code including, but not limited to, lodging houses, dormitories, timeshares, condominiums, shel- ters for homeless persons, congregate residences, apartments, dwellings, employee housing, factory- built housing, and other types of dwellings containing sleeping accommodations with or without common toilet or cooking facilities.

Sections of this code identified by the abbrevia- tion “HCD 1-AC” require specific accommodations for persons with disabilities as defined in Chapter 2 of the California Building Code. The application of such provisions shall be in conjunction with other requirements of this code and apply only to newly- constructed covered multifamily dwellings as defined in Chapter 2 of the California Building Code. “HCD 1-AC” applications include, but are not limited to, the following: (1) All newly-constructed covered multifamily

dwellings as defined in Chapter 2 of the Cali-

All newly-constructed covered multifamily

dwellings as defined in Chapter 2 of the Cali- fornia Building Code.

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DIVISION I CALIFORNIA ADMINISTRATION any other purpose or distributed to any other persons or parti es.

(2) New common use areas as defined in Chapter 2

of the California Building Code serving existing

(2) New common use areas as defined in Chapter 2

of the California Building Code serving existing covered multifamily dwellings. (3) Additions to existing buildings, where the addi-

tion alone meets the definition of covered multi-

(3) Additions to existing buildings, where the addi-

tion alone meets the definition of covered multi- family dwellings as defined in Chapter 2 of the California Building Code. (4) New common use areas serving new covered

multifamily dwellings.

(4) New common use areas serving new covered

multifamily dwellings. (5) Where any portion of a building’s exterior is

preserved, but the interior of the building is

(5) Where any portion of a building’s exterior is

preserved, but the interior of the building is removed, including all structural portions of floors and ceilings, the building is considered a new building for determining the application of California Building Code, Chapter 11A. “HCD 1-AC” building standards generally do not apply to public use areas or public accommodations such as hotels and motels, and public housing. Public use areas, public accommodations, and public housing, as defined in Chapter 2 of the Cali- fornia Building Code, are subject to the Division of the State Architect (DSA-AC) in Chapter 11B, and are referenced in Section 1.9.1.

11A._ “HCD 1-AC” building standards generally do not apply to public use areas or public accommodations such as hotels and motels, and public housing. Public use areas, public accommodations, and public housing, as defined in Chapter 2 of the Cali- fornia Building Code, are subject to the Division of the State Architect (DSA-AC) in Chapter 11B, and are referenced in Section 1.9.1.

Newly constructed covered multifamily dwellings, which can also be defined as public housing, shall be subject to the requirements of Chapter 11A and Chapter 11B. Enforcing Agency – Local building department or the Department of Housing and Community Devel- opment. Authority Cited – Health and Safety Code Sections 17040, 17050, 17920.9, 17921, 17921.5, 17921.6, 17921.10, 17922, 17922.6, 17922.12, 17922.14, 17926, 17927, 17928, 18300, 18552, 18554, 18620, 18630, 18640, 18670, 18690, 18691, 18865, 18871.3, 18871.4, 18873, 18873.1 through 18873.5, 18938.3, 18944.11, and 19990; and Government Code Section 12955.1. References Health and Safety Code Sections 17000 through 17062.5, 17910 through 17995.5, 18200 through 18700, 18860 through 18874, and 19960 through 19997; Civil Code Sections 1101.4, 1101.5 and 1954.201; and Government Code Sections 12955.1 and 12955.1.1. 1.8.2.1.3 Permanent Buildings in Mobilehome Parks and Special Occupancy Parks. Application – Permanent buildings, and permanent accessory buildings or structures, constructed within mobilehome parks and special occupancy parks that are under the control and ownership of the park operator. Sections of this code which pertain to applications listed in this section are iden- tified using the abbreviation “HCD 2”. Enforcing Agency The Department of Housing and Community Development, local building department or other local agency that has assumed

within mobilehome parks and special occupancy parks that are under the control and ownership of the park operator. Sections of this code which pertain to applications listed in this section are iden- tified using the abbreviation “HCD 2”. Enforcing Agency The Department of Housing and Community Development, local building department or other local agency that has assumed

responsibility for the enforcement of Health and Safety Code, Division 13, Part 2.1, commencing with Section 18200 for mobilehome parks and Health and Safety Code, Division 13, Part 2.3, commencing with Section 18860 for special occu- pancy parks. Authority Cited – Health and Safety Code Sections 17040, 17050, 17920.9, 17921, 17921.5, 17921.6, 17921.10, 17922, 17922.6, 17922.12, 17922.14, 17926, 17927, 17928, 18300, 18552, 18554, 18620, 18630, 18640, 18670, 18690, 18691, 18865, 18871.3, 18871.4, 18873, 18873.1 through 18873.5, 18938.3, 18944.11, and 19990; and Government Code Section 12955.1. References Health and Safety Code Sections 17000 through 17062.5, 17910 through 17995.5, 18200 through 18700, 18860 through 18874, and 19960 through 19997; Civil Code Sections 1101.4, 1101.5 and 1954.201; and Government Code Sections 12955.1 and 12955.1.1. 1.8.3 Local Enforcing Agency. 1.8.3.1 Duties and Powers. The building department of every city, county, or city and county shall enforce all the provisions of law, this code, and the other rules and regu- lations promulgated by the Department of Housing and Community Development pertaining to the installation, erection, construction, reconstruction, movement, enlargement, conversion, alteration, repair, removal, demolition, or arrangement of apartments, condo- miniums, hotels, motels, lodging houses, and dwellings, including accessory buildings, facilities, and uses thereto.

The provisions regulating the erection and construc- tion of dwellings and appurtenant structures shall not apply to existing structures as to which construction is commenced or approved prior to the effective date of these regulations. Requirements relating to use, mainte- nance, and occupancy shall apply to all dwellings and appurtenant structures approved for construction or constructed before or after the effective date of this code.

For additional information regarding the use and occupancy of existing buildings and appurtenant structures, see California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, commencing with Section 1. 1.8.3.2 Laws, Rules, and Regulations. Other than the building standards contained in this code, and notwith- standing other provisions of law, the statutory authority and location of the laws, rules, and regulations to be enforced by local enforcing agencies are listed by statute in Sections 1.8.3.2.1 through 1.8.3.2.5 below:

Chapter 1, Subchapter 1, commencing with Section 1. 1.8.3.2 Laws, Rules, and Regulations. Other than the building standards contained in this code, and notwith- standing other provisions of law, the statutory authority and location of the laws, rules, and regulations to be enforced by local enforcing agencies are listed by statute in Sections 1.8.3.2.1 through 1.8.3.2.5 below:

1.8.3.2.1 State Housing Law. Refer to the State Housing Law, California Health and Safety Code, Division 13, Part 1.5, commencing with Section 17910, and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, commencing

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with Section 1, for the erection, construction, recon- struction, movement, enlargement, conversion, alter- ation, repair, removal, demolition, or arrangement of apartments, condominiums, hotels, motels, lodging houses, and dwellings, including accessory buildings, facilities, and uses thereto. 1.8.3.2.2 Mobilehome Parks Act. Refer to the Mobilehome Parks Act, California Health and Safety Code, Division 13, Part 2.1, commencing with Section 18200 and California Code of Regula- tions, Title 25, Division 1, Chapter 2, commencing with Section 1000 for mobilehome park administra- tive and enforcement authority, permits, plans, fees, violations, inspections, and penalties both within and outside mobilehome parks. Exception: Mobilehome parks where the Depart- ment of Housing and Community Development is the enforcing agency. 1.8.3.2.3 Special Occupancy Parks Act. Refer to the Special Occupancy Parks Act, California Health and Safety Code, Division 13, Part 2.3, commencing with Section 18860 and California Code of Regulations, Title 25, Division 1, Chapter 2.2, commencing with Section 2000 for special occupancy park administra- tive and enforcement authority, permits, fees, viola- tions, inspections, and penalties both within and outside of special occupancy parks. Exception: Special occupancy parks where the Department of Housing and Community Develop- ment is the enforcing agency. 1.8.3.2.4 Employee Housing Act. Refer to the Employee Housing Act, California Health and Safety Code, Division 13, Part 1, commencing with Section 17000 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 3, commencing with Section 600 for employee housing administrative and enforcement authority, permits, fees, violations, inspections, and penalties. 1.8.3.2.5 Factory-Built Housing Law. Refer to the Factory-Built Housing Law, California Health and Safety Code, Division 13, Part 6, commencing with Section 19960 and California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, commencing with Section 3000 for factory-built housing administrative and enforcement authority, permits, fees, violations, inspections, and penalties. 1.8.4 Permits, Fees, Applications, and Inspections. 1.8.4.1 Permits. A written construction permit shall be obtained from the enforcing agency prior to the erection, construction, reconstruction, installation, relocation, or alteration of any mechanical system. Exceptions: (1) Work exempt from permits as specified in Chapter

1, Administration, Division II, Section 104.2 Items (1) through (5) of this code.

(2) Changes, alterations, or repairs of a minor nature not

affecting structural features, egress, sanitation, safety,

(2) Changes, alterations, or repairs of a minor nature not

affecting structural features, egress, sanitation, safety, or accessibility as determined by the enforcing agency. Exemptions from permit requirements shall not be deemed to grant authorization for any work to be done in any manner in violation of other provisions of law or this code. 1.8.4.2 Fees. Subject to other provisions of law, the governing body of any city, county, or city and county may prescribe fees to defray the cost of enforcement of rules and regulations promulgated by the Department of Housing and Community Development. The amount of the fees shall not exceed the amount reasonably neces- sary to administer or process permits, certificates, forms, or other documents, or to defray the costs of enforcement. For additional information, see State Housing Law, Health and Safety Code, Division 13, Part 1.5, Section 17951 and California Code of Regulations, Title 25, Divi- sion 1, Chapter 1, Subchapter 1, Article 3, commencing with Section 6. 1.8.4.3 Plan Review and Time Limitations. Subject to other provisions of law, provisions related to plan checking, prohibition of excessive delays, and contracting with or employment of private parties to perform plan checking are set forth in the State Housing Law, Health and Safety Code Section 17960.1, and for employee housing, in Health and Safety Code Section 17021.

1.8.4.3.1 Retention of Plans. The building depart- ment of every city, county, or city and county shall maintain an official copy, microfilm, or electronic or other type of photographic copy of the plans of every building, during the life of the building, for which the department issued a building permit. Exceptions: (1) Single or multiple dwellings not more than two

stories and basement in height.

(1) Single or multiple dwellings not more than two

stories and basement in height. (2) Garages and other structures appurtenant to

buildings listed in Exception 1.

(2) Garages and other structures appurtenant to

buildings listed in Exception 1. (3) Farm or ranch buildings appurtenant to build-

ings listed in Exception 1.

(3) Farm or ranch buildings appurtenant to build-

ings listed in Exception 1. (4) Any one-story building where the span between

bearing walls does not exceed 25 feet (7620

(4) Any one-story building where the span between

bearing walls does not exceed 25 feet (7620 mm), except a steel frame or concrete building. All plans for common interest developments as defined in Section 4100 of the California Civil Code shall be retained. For additional information regarding plan retention and reproduction of plans by an enforcing agency, see Health and Safety Code Sections 19850 through 19852. 1.8.4.4 Inspections. Construction or work for which a permit is required shall be subject to inspection by the building official and such construction or work shall remain accessible and exposed for inspection purposes until approved. Approval as a result of an inspection shall not be construed to be an approval of a violation of the provisions of this code or other regulations of the Department of Housing and Community Development.

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1.8.5 Right of Entry for Enforcement. 1.8.5.1 General. Subject to other provisions of law, offi- cers and agents of the enforcing agency may enter and inspect public and private properties to secure compli- ance with the rules and regulations promulgated by the Department of Housing and Community Development. For limitations and additional information regarding enforcement, see the following: (1) For applications subject to State Housing Law as

referenced in Section 1.8.3.2.1 of this code, refer to

(1) For applications subject to State Housing Law as

referenced in Section 1.8.3.2.1 of this code, refer to Health and Safety Code, Division 13, Part 1.5, commencing with Section 17910 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, commencing with Section 1. (2) For applications subject to the Mobilehome Parks

Act as referenced in Section 1.8.3.2.2 of this code,

1.8.6.2 Findings, Filings, and Rejections of Local Modifications. Prior to making any modifications or establishing more restrictive building standards, the governing body shall make express findings and filings, as required by California Health and Safety Code Section 17958.7, showing that such modifications are reasonably necessary due to local climatic, geological, or topo- graphical conditions. No modification shall become effective or operative unless the following requirements are met: (1) The express findings shall be made available as a

public record.

(1) The express findings shall be made available as a

public record. (2) A copy of the modification and express finding, each

document marked to cross-reference the other, shall

(2) For applications subject to the Mobilehome Parks

Act as referenced in Section 1.8.3.2.2 of this code, refer to Health and Safety Code, Division 13, Part 2.1, commencing with Section 18200, and California Code of Regulations, Title 25, Division 1, Chapter 2, commencing with Section 1000. (3) For applications subject to the Special Occupancy

Parks Act as referenced in Section 1.8.3.2.3 of this

(2) A copy of the modification and express finding, each

document marked to cross-reference the other, shall be filed with the California Building Standards Commission for a city, county, or city and county, and with the Department of Housing and Commu- nity Development for fire protection districts. (3) The California Building Standards Commission has

not rejected the modification or change.

(3) For applications subject to the Special Occupancy

Parks Act as referenced in Section 1.8.3.2.3 of this code, refer to Health and Safety Code, Division 13, Part 2.3, commencing with Section 18860, and Cali- fornia Code of Regulations, Title 25, Division 1, Chapter 2.2, commencing with Section 2000. (4) For applications subject to the Employee Housing

Act as referenced in Section 1.8.3.2.4 of this code,

(3) The California Building Standards Commission has

not rejected the modification or change. Nothing in this section shall limit the authority of fire protection districts pursuant to California Health and Safety Code Section 13869.7(a). 1.8.7 Alternate Materials, Designs, Tests, and Methods of Construction.

(4) For applications subject to the Employee Housing

Act as referenced in Section 1.8.3.2.4 of this code, refer to Health and Safety Code, Division 13, Part 1, commencing with Section 17000 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 3, commencing with Section 600. (5) For applications subject to the Factory-Built Housing

Law as referenced in Section 1.8.3.2.5 of this code,

1.8.7.1 General. The provisions of this code as adopted by the Department of Housing and Community Develop- ment are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, design, or method of construction not specifically prescribed by this code. Consideration and approval of alternates shall comply with Section 1.8.7.2 for local building departments and Section 1.8.7.3 for the Depart- ment of Housing and Community Development. 1.8.7.2 Local Building Departments. The building department of any city, county, or city and county may approve alternates for use in the erection, construction, reconstruction, movement, enlargement, conversion, alteration, repair, removal, demolition, or arrangement of apartments, condominiums, hotels, motels, lodging houses, dwellings, or accessory structures, except for the following: (1) Structures located in mobilehome parks as defined

in California Health and Safety Code Section 18214.

(5) For applications subject to the Factory-Built Housing

Law as referenced in Section 1.8.3.2.5 of this code, refer to Health and Safety Code, Division 13, Part 6, commencing with Section 19960 and California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, commencing with Section 3000. 1.8.6 Local Modification by Ordinance or Regulation. 1.8.6.1 General. Subject to other provisions of law, a city, county, or city and county may make changes to the provi- sions adopted by the Department of Housing and Community Development. If any city, county, or city and county does not amend, add, or repeal by local ordi- nances or regulations the provisions published in this code or other regulations promulgated by the Department of Housing and Community Development, those provi- sions shall be applicable and shall become effective 180 days after publication by the California Building Stan- dards Commission. Amendments, additions, and deletions to this code adopted by a city, county, or city and county pursuant to California Health and Safety Code Sections 17958.5, 17958.7 and 18941.5, together with all appli- cable portions of this code, shall also become effective 180 days after publication of the California Building Standards Code by the California Building Standards Commission.

(1) Structures located in mobilehome parks as defined

in California Health and Safety Code Section 18214. (2) Structures located in special occupancy parks as

defined in California Health and Safety Code

(2) Structures located in special occupancy parks as

defined in California Health and Safety Code Section 18862.43. (3) Factory-built housing as defined in California

Health and Safety Code Section 19971.

Factory-built housing as defined in California

Health and Safety Code Section 19971. 1.8.7.2.1 Approval of Alternates. The consideration and approval of alternates by a local building department shall comply with the following proce- dures and limitations: (1) The approval shall be granted on a case-by-

case basis.

case basis.

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(2) Evidence shall be submitted to substantiate

claims that the proposed alternate, in perform-

(2) Evidence shall be submitted to substantiate

claims that the proposed alternate, in perform- ance, safety, and protection of life and health, conforms to, or is at least equivalent to, the standards contained in this code and other rules and regulations promulgated by the Department of Housing and Community Development. (3) The local building department may require tests

performed by an approved testing agency at the

(3) The local building department may require tests

performed by an approved testing agency at the expense of the owner or owner’s agent as proof of compliance. (4) If the proposed alternate is related to accessi-

bility in covered multifamily dwellings or facili-

housing appeals board as specified in California Health and Safety Code Sections 17920.5 and 17920.6. 1.8.8.2 Definitions. The following terms shall for the purposes of this section have the meaning shown. Housing Appeals Board. The board or agency of a city, county, or city and county which is authorized by the governing body of the city, county, or city and county to hear appeals regarding the requirements of the city, county, or city and county relating to the use, mainte- nance, and change of occupancy of buildings and struc- tures, including requirements governing alteration, additions, repair, demolition, and moving. In any area in which there is no such board or agency, “Housing Appeals Board” means the local appeals board having jurisdiction over the area. Local Appeals Board. The board or agency of a city, county, or city and county which is authorized by the governing body of the city, county, or city and county to hear appeals regarding the building requirements of the city, county, or city and county. In any area in which there is no such board or agency, “Local Appeals Board” means the governing body of the city, county, or city and county having jurisdiction over the area. 1.8.8.3 Appeals. Except as otherwise provided by law, any person, firm, or corporation adversely affected by a decision, order, or determination by a city, county, or city and county relating to the application of building stan- dards published in the California Building Standards Code, or any other applicable rule or regulation adopted by the Department of Housing and Community Develop- ment, or any lawfully enacted ordinance by a city, county, or city and county, may appeal the issue for resolution to the local appeals board or housing appeals board as appropriate.

(4) If the proposed alternate is related to accessi-

bility in covered multifamily dwellings or facili- ties serving covered multifamily dwellings as defined in Chapter 2 of the California Building Code, the proposed alternate must also meet the threshold set for equivalent facilitation as defined in Chapter 2 of the California Building Code. For additional information regarding approval of alternates by a local building department pursuant to the State Housing Law, see California Health and Safety Code Section 17951(e) and Cali- fornia Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1. 1.8.7.3 Department of Housing and Community Devel- opment. The Department of Housing and Community Development may approve alternates for use in the erec- tion, construction, reconstruction, movement, enlarge- ment, conversion, alteration, repair, removal, or demolition of apartments, condominiums, hotels, motels, lodging houses, dwellings, or accessory structures thereto, and permanent buildings in mobilehome parks and special occupancy parks. The consideration and approval of alter- nates shall comply with the following: (1) The department may require tests at the expense of

the owner or owner’s agent to substantiate compli-

(1) The department may require tests at the expense of

the owner or owner’s agent to substantiate compli- ance with the California Building Standards Code. (2) The approved alternate shall, for its intended

purpose, be at least equivalent in performance and

The local appeals board shall hear appeals relating to new building construction and the housing appeals board shall hear appeals relating to existing buildings. 1.8.9 Unsafe Buildings or Structures. 1.8.9.1 Authority to Enforce. Subject to other provisions of law, the administration, enforcement, actions, proceed- ings, abatement, violations, and penalties for unsafe buildings and structures are contained in the following statutes and regulations: (1) For applications subject to the State Housing Law

as referenced in Section 1.8.3.2.1 of this code, refer

(2) The approved alternate shall, for its intended

purpose, be at least equivalent in performance and safety to the materials, designs, tests, or methods of construction prescribed by this code. 1.8.8 Appeals Board. 1.8.8.1 General. Every city, county, or city and county shall establish a process to hear and decide appeals of orders, decisions, and determinations made by the enforcing agency relative to the application and interpretation of this code and other regulations governing construction, use, maintenance and change of occupancy. The governing body of any city, county, or city and county may establish a local appeals board and a housing appeals board to serve this purpose. Members of the appeals board(s) shall not be employees of the enforcing agency and shall be knowl- edgeable in the applicable building codes, regulations and ordinances as determined by the governing body of the city, county, or city and county.

(1) For applications subject to the State Housing Law

as referenced in Section 1.8.3.2.1 of this code, refer to Health and Safety Code, Division 13, Part 1.5, commencing with Section 17910 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, commencing with Section 1. (2) For applications subject to the Mobilehome Parks

Act as referenced in Section 1.8.3.2.2 of this code,

Where no such appeals boards or agencies have been established, the governing body of the city, county, or city and county shall serve as the local appeals board or

(2) For applications subject to the Mobilehome Parks

Act as referenced in Section 1.8.3.2.2 of this code, refer to Health and Safety Code, Division 13, Part 2.1, commencing with Section 18200 and California Code of Regulations, Title 25, Division 1, Chapter 2, commencing with Section 1000. (3) For applications subject to the Special Occupancy

Parks Act as referenced in Section 1.8.3.2.3 of this

For applications subject to the Special Occupancy

Parks Act as referenced in Section 1.8.3.2.3 of this

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code, refer to Health and Safety Code, Division 13, Part 2.3, commencing with Section 18860 and Cali- fornia Code of Regulations, Title 25, Division 1, Chapter 2.2, commencing with Section 2000. (4) For applications subject to the Employee Housing

Act as referenced in Section 1.8.3.2.4 of this code,

(4) For applications subject to the Employee Housing

Act as referenced in Section 1.8.3.2.4 of this code, refer to Health and Safety Code, Division 13, Part 1, commencing with Section 17000 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 3, commencing with Section 600. (5) For applications subject to the Factory-Built Housing

Law as referenced in Section 1.8.3.2.5 of this code,

(5) For applications subject to the Factory-Built Housing

Law as referenced in Section 1.8.3.2.5 of this code, refer to Health and Safety Code, Division 13, Part 6, commencing with Section 19960 and California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, commencing with Section 3000. 1.8.9.2 Actions and Proceedings. Subject to other provi- sions of law, punishments, penalties, and fines for viola- tions of building standards are contained in the following statutes and regulations: (1) For applications subject to the State Housing Law

as referenced in Section 1.8.3.2.1 of this code, refer

Existing Building Code, as adopted by the Department of Housing and Community Development. For additional information, see California Health and Safety Code, Sections 17912, 17920.3, 17922 and 17958.8. 1.8.10.2 Moved Structures. Subject to the requirements of California Health and Safety Code Sections 17922, 17922.3 and 17958.9, local ordinances or regulations relating to a moved residential building or accessory structure thereto, shall permit the replacement, retention, and extension of original materials and the use of original methods of construction so long as the structure does not become or continue to be a substandard building.

<

(1) For applications subject to the State Housing Law

as referenced in Section 1.8.3.2.1 of this code, refer to Health and Safety Code, Division 13, Part 1.5, commencing with Section 17910 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, commencing with Section 1. (2) For applications subject to the Mobilehome Parks

Act as referenced in Section 1.8.3.2.2 of this code,

1.9.0 Division of the State Architect. 1.9.1 Reserved for the Division of the State Architect – Access Compliance. 1.9.2 Division of the State Architect – Structural Safety. 1.9.2.1 DSA-SS [Division of the State Architect – Struc- tural Safety]. Application – Public elementary and secondary schools, community college buildings, and state-owned or state- leased essential services buildings. Enforcing Agency Division of the State Architect – Structural Safety (DSA-SS).

(2) For applications subject to the Mobilehome Parks

Act as referenced in Section 1.8.3.2.2 of this code, refer to Health and Safety Code, Division 13, Part 2.1, commencing with Section 18200 and California Code of Regulations, Title 25, Division 1, Chapter 2, commencing with Section 1000. (3) For applications subject to the Special Occupancy

Parks Act as referenced in Section 1.8.3.2.3 of this

(3) For applications subject to the Special Occupancy

Parks Act as referenced in Section 1.8.3.2.3 of this code, refer to Health and Safety Code, Division 13, Part 2.3, commencing with Section 18860 and Cali- fornia Code of Regulations, Title 25, Division 1, Chapter 2.2, commencing with Section 2000. (4) For applications subject to the Employee Housing

Act as referenced in Section 1.8.3.2.4 of this code,

The Division of the State Architect has been delegated the responsibility and authority by the Department of General Services to review and approve the design and oversee and observe the construction of public elementary and secondary schools, community colleges, and state- owned or state-leased essential services buildings. Authority Cited Education Code Sections 17310 and 81142, and Health & Safety Code Section 16022. References Education Code Sections 17280 through 17317 and 81130 through 81147, and Health & Safety Code Sections 16000 through 16023.

(4) For applications subject to the Employee Housing

Act as referenced in Section 1.8.3.2.4 of this code, refer to Health and Safety Code, Division 13, Part 1, commencing with Section 17000 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 3, commencing with Section 600. (5) For applications subject to the Factory-Built Housing

Law as referenced in Section 1.8.3.2.5 of this code,

1.9.2.1.1 Adopting Agency Identification. The provi- sions of this code applicable to buildings identified in this Subsection 1.9.2.1 will be identified in the Matrix Adoption Tables under the acronym DSA-SS. 1.9.2.2 DSA-SS/CC [Division of the State Architect – Structural Safety/Community Colleges]. Application – Community Colleges.

The Division of the State Architect has been delegated the authority by the Department of General Services to promulgate alternate building standards for application to community colleges, which a community college may elect to use in lieu of standards promulgated by DSA-SS, in accor- dance with Section 1.9.2.1. Refer to Title 24, Part 2, Section 1.9.2.2. Enforcing Agency Division of the State Architect – Structural Safety/Community Colleges (DSA-SS/CC).

(5) For applications subject to the Factory-Built Housing

Law as referenced in Section 1.8.3.2.5 of this code, refer to Health and Safety Code, Division 13, Part 6, commencing with Section 19960 and California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, commencing with Section 3000. 1.8.10 Other Building Regulations. 1.8.10.1 Existing Structures. Notwithstanding other provisions of law, the replacement, retention, and exten- sion of original materials and the use of original methods of construction for any existing building or accessory structure, or portions thereof, shall be permitted in accor- dance with the provisions of this code and the California

The Division of the State Architect has been delegated the authority by the Department of General Services to review and approve the design and oversee and observe

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enforce the Division of the State Architect access compli- ance regulations and the regulations of the Office of the State Fire Marshal for the above stated facility type. 1.10.2.1 Applicable Administrative Standards: (1) Title 24, Part 1, California Code of Regulations:

Chapter 7.

(1) Title 24, Part 1, California Code of Regulations:

Chapter 7. (2) Title 24, Part 2, California Code of Regulations:

Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and

>

1.10.0 Office of Statewide Health Planning and Develop- ment. 1.10.1 OSHPD 1 and OSHPD 1R. Specific scope of appli- cation of the agency responsible for enforcement, enforce- ment agency, specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

the construction of community colleges electing to use the alternative building standards as provided in this section. Authority Cited – Education Code Section 81053. References Education Code Sections 81052, 81053, and 81130 through 81147.

1.9.2.2.1 Adopting Agency Identification. The provi- sions of this code applicable to buildings identified in this Subsection 1.9.2.2 will be identified in the Matrix Adoption Tables under the acronym DSA-SS/CC.

OSHPD 1 and OSHPD 1R Application [OSHPD 1] General acute-care hospital buildings. [OSHPD 1R] Non-conforming hospital buildings that have been removed from acute care service. Enforcing Agency Office of Statewide Health Plan- ning and Development (OSHPD). The office shall enforce the Division of the State Architect access compli- ance regulations and the regulations of the Office of the State Fire Marshal for the above stated facility types. 1.10.1.1 Applicable Administrative Standards: (1) Title 24, Part 1, California Code of Regulations:

Chapters 6 and 7.

(2) Title 24, Part 2, California Code of Regulations:

Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and as indicated in the adoption matrix for Chapter 1, Division II. 1.10.2.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10, and 11. Authority Cited Health and Safety Code Sections 127010, 127015, 1275, and 129850. References – Health and Safety Code Sections 127010, 127015, 1275, and 129680. 1.10.2.3 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Subsection 1.10.2 will be identified in the Matrix Adop- tion Tables under the acronym OSHPD 2. 1.10.3 OSHPD 3. Specific scope of application of the agency responsible for enforcement, enforcement agency, specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

(1) Title 24, Part 1, California Code of Regulations:

Chapters 6 and 7. (2) Title 24, Part 2, California Code of Regulations:

Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and

OSHPD 3 Application Licensed clinics and any freestanding building under a hospital license where outpatient clin- ical services are provided. Enforcing Agency – Local building department. 1.10.3.1 Applicable Administrative Standards. (1) Title 24, Part 1, California Code of Regulations:

Chapter 7.

(2) Title 24, Part 2, California Code of Regulations:

Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and as indicated in the adoption matrix for Chapter 1, Division II. 1.10.1.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10 and 11. Authority Cited Health and Safety Code Sections 127010, 127015, 1275, and 129850. References Health and Safety Code Sections 19958, 127010, 127015, 129680, 1275, and 129675 through 130070. 1.10.1.3 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Subsection 1.10.1 will be identified in the Matrix Adop- tion Tables under the acronym OSHPD 1, and OSHPD 1R. 1.10.2 OSHPD 2. Specific scope of application of the agency responsible for enforcement, enforcement agency, specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

(1) Title 24, Part 1, California Code of Regulations:

Chapter 7. (2) Title 24, Part 2, California Code of Regulations:

Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and

OSHPD 2 Application – Skilled nursing facilities and intermediate

– care facility buildings. Enforcing Agency Office of Statewide Health Plan- ning and Development (OSHPD). The office shall also

(2) Title 24, Part 2, California Code of Regulations:

Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and as indicated in the adoption matrix for Chapter 1, Division II. 1.10.3.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10, and 11. Authority Cited Health and Safety Code Sections 127010, 127015, and 1226. References – Health and Safety Code Sections 127010, 127015, 129885, and 1226, Government Code Section 54350, and State Constitution Article 11 Section 7. 1.10.3.3 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Subsection 1.10.3 will be identified in the Matrix Adop- tion Tables under the acronym OSHPD 3. 1.10.4 OSHPD 4. Specific scope of application of the agency responsible for enforcement, enforcement agency, specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

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OSHPD 4 Application – Correctional Treatment Centers. Enforcing Agency Office of Statewide Health Plan- ning and Development (OSHPD). The Office shall also enforce the Division of the State Architect access compli- ance regulations and the regulations of the Office of the State Fire Marshal for the above stated facility types. 1.10.4.1 Applicable Administrative Standards: (1) Title 24, Part 1, California Code of Regulations:

Chapter 7.

(1) Title 24, Part 1, California Code of Regulations:

Chapter 7. (2) Title 24, Part 2, California Code of Regulations:

Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and

(2) Title 24, Part 2, California Code of Regulations:

Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and as indicated in the adoption matrix for Chapter 1, Division II. 1.10.4.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10, and 11. Authority Cited Health and Safety Code Sections 127010, 127015, and 129790. References – Health and Safety Code Sections 127010, 127015, 1275, and 129675 through 130070. 1.10.4.3 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Subsection 1.10.4 will be identified in the Matrix Adop- tion Tables under the acronym OSHPD 4. 1.10.5 OSHPD 5. Specific scope of application of the agency responsible for enforcement, enforcement agency and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

OSHPD 5 Application – Acute psychiatric hospital buildings. Enforcing Agency – Office of Statewide Health Plan- ning and Development (OSHPD). The office shall also enforce the Division of the State Architect – Access Compliance regulations and the regulations of the Office of the State Fire Marshal for the above-stated facility types. 1.10.5.1 Applicable Administrative Standards. (1) Title 24, Part 1, California Code of Regulations:

Chapter 7.

(1) Title 24, Part 1, California Code of Regulations:

Chapter 7. (2) Title 24, Part 2, California Code of Regulations:

Sections 1.1 and 1.10, Chapter 1, Division I, and as

(2) Title 24, Part 2, California Code of Regulations:

Sections 1.1 and 1.10, Chapter 1, Division I, and as indicated in the adoption matrix for Chapter 1, Divi- sion II. 1.10.5.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10 and 11. Authority Cited – Health and Safety Code Sections 1275 and 129850. References – Health and Safety Code Sections 129680, 1275 and 129675 through 130070. 1.10.5.3 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Subsection 1.10.5 will be identified in the Matrix Adop- tion Tables under the Acronym OSHPD 5.

1 . 11.0 Office of the State Fire Marshal. 1.11.1 SFM Office of the State Fire Marshal. Specific scope of application of the agency responsible for enforce- ment, the enforcement agency and the specific authority to adopt and enforce such provisions of this code, unless other- wise stated. Application:

Institutional, Educational, or any Similar Occupancy . Any building or structure used or intended for use as an asylum, jail, mental hospital, hospital, sanitarium, home for the aged, children’s nursery, children’s home, school, or any similar occupancy of any capacity. Authority Cited – Health and Safety Code Section 13143. Reference – Health and Safety Code Section 13143.

tutional, Educational, or any Similar Occupancy_** . Any building or structure used or intended for use as an asylum, jail, mental hospital, hospital, sanitarium, home for the aged, children’s nursery, children’s home, school, or any similar occupancy of any capacity. Authority Cited – Health and Safety Code Section 13143. Reference – Health and Safety Code Section 13143.

Assembly or Similar Place of Assemblage. Any theater, dancehall, skating rink, auditorium, assembly hall, meeting hall, nightclub, fair building or similar place of assemblage where 50 or more persons may gather together in a building, room or structure for the purpose of amusement, entertain- ment, instruction, deliberation, worship, drinking or dining, awaiting transportation, or education. Authority Cited – Health and Safety Code Section 13143. Reference – Health and Safety Code Section 13143.

Small Family Day Care Homes. Authority Cited – Health and Safety Code Sections 1597.45, 1597.54, 13143, and 17921. Reference – Health and Safety Code Section 13143.

Large Family Day Care Homes. Authority Cited – Health and Safety Code Sections 1597.46, 1597.54, and 17921. Reference – Health and Safety Code Section 13143.

Residential Facilities and Residential Facilities for the Elderly. Authority Cited – Health and Safety Code Section 13133. Reference – Health and Safety Code Section 13143.

Any State Institution, Other State-Owned or State-Occupied Building. Authority Cited – Health and Safety Code Section 13108. Reference – Health and Safety Code Section 13143.

High-Rise Structures. Authority Cited – Health and Safety Code Section 13211. Reference – Health and Safety Code Section 13143.

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Motion Picture Production Studios. Authority Cited – Health and Safety Code Section 13143.1. Reference – Health and Safety Code Section 13143.

Organized Camps. Authority Cited – Health and Safety Code Section 18897.3. Reference – Health and Safety Code Section 13143.

Residential. All hotels, motels, lodging houses, apartment houses, and dwellings, including congregate residences and buildings and structures accessory thereto. Multiple-story structures existing on January 1, 1975, let for human habita- tion, including and limited to, hotels, motels and apartment houses, less than 75 feet (22 860 mm) above the lowest floor level having building access, wherein rooms used for sleeping are let above the ground floor. Authority Cited – Health and Safety Code Sections 13143.2 and 17921. Reference – Health and Safety Code Section 13143.

nuary 1, 1975, let for human habita-_ tion, including and limited to, hotels, motels and apartment houses, less than 75 feet (22 860 mm) above the lowest floor level having building access, wherein rooms used for sleeping are let above the ground floor. Authority Cited – Health and Safety Code Sections 13143.2 and 17921. Reference – Health and Safety Code Section 13143.

Residential Care Facilities. Certified family care homes, out- of-home placement facilities, halfway houses, drug and/or alcohol rehabilitation facilities and any building or structure used or intended for use as a home or institution for the housing of any person of any age when such person is referred to or placed within such home or institution for protective social care and supervision services by any governmental agency. Authority Cited – Health and Safety Code Section 13143.6. Reference – Health and Safety Code Section 13143.

Tents, Awnings, or other Fabric Enclosures Used in Connec- tion with any Occupancy. Authority Cited – Health and Safety Code Section 13116. Reference – Health and Safety Code Section 13143.

Fire Alarm Devices, Equipment, and Systems in Connection with any Occupancy. Authority Cited – Health and Safety Code Section 13114. Reference – Health and Safety Code Section 13143.

References – Government Code Section 11152.5, Health and Safety Code Section 13143 and California Education Code Chapter 12.5, Leroy F. Greene School Facilities Act of 1998, Article 1.w.

Wildland-Urban Interface Fire Area. Authority Cited Health and Safety Code Sections 13143, 13108.5(a), 18949.2(b), (c) and Government Code Section 51189. References – Health and Safety Code Sections 13143, Govern- ment Code Sections 51176, 51177, 51178, and 51179 and Public Resources Code Sections 4201 through 4204. 1.11.2 Duties and Powers of the Enforcing Agency. 1.11.2.1 Enforcement. 1.11.2.1.1 The responsibility for enforcement of building standards adopted by the State Fire Marshal and published in the California Building Standards Code relating to fire and panic safety and other regu- lations of the State Fire Marshal shall except as provided in Section 1.11.2.1.2 be as follows: (1) The city, county, or city and county with jurisdic-

tion in the area affected by the standard or regu-

(2) The chief of any city or county fire department or

of any fire protection district, and authorized representatives, shall enforce within the jurisdic- tion the building standards and other regulations of the State Fire Marshal, except those described in Item 1 or 4. (3) The State Fire Marshal shall have authority to

enforce the building standards and other regula-

(3) The State Fire Marshal shall have authority to

enforce the building standards and other regula- tions of the State Fire Marshal in areas outside of corporate cities and districts providing fire protection services. (4) The State Fire Marshal shall have authority to

enforce the building standards and other regula-

(1) The city, county, or city and county with jurisdic-

tion in the area affected by the standard or regu- lation shall delegate the enforcement of the building standards relating to fire and panic safety and other regulations of the State Fire Marshal as they relate to Group R-3 occupancies, as described in Section 310.1 of Part 2 of the California Building Standards Code, to either of the following: 1.1. The chief of the fire authority of the city, county, or city and county, or an authorized representative. 1.2. The chief building official of the city, county, or city and county, or an authorized repre- sentative. (2) The chief of any city or county fire department or

of any fire protection district, and authorized

Hazardous Materials. Authority Cited – Health and Safety Code Section 13143.9. Reference – Health and Safety Code Section 13143.

Flammable and Combustible Liquids. Authority Cited – Health and Safety Code Section 13143.6. Reference – Health and Safety Code Section 13143.

Public School Automatic Fire Detection, Alarm, and Sprin- kler Systems. Authority Cited – Health and Safety Code Section 13143 and California Education Code Article 7.5, Sections 17074.50, 17074.52, and 17074.54.

(4) The State Fire Marshal shall have authority to

enforce the building standards and other regula- tions of the State Fire Marshal in corporate cities and districts providing fire protection services on request of the chief fire official or the governing body. (5) Any fee charged pursuant to the enforcement

authority of this section shall not exceed the

Any fee charged pursuant to the enforcement

authority of this section shall not exceed the estimated reasonable cost of providing the service for which the fee is charged pursuant to Section 66014 of the Government Code.

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DIVISION I CALIFORNIA ADMINISTRATION any other purpose or distributed to any other persons or parti es.

1.11.2.1.2 Pursuant to Health and Safety Code Section 13108, and except as otherwise provided in this section, building standards adopted by the State Fire Marshal published in the California Building Standards Code relating to fire and panic safety shall be enforced by the State Fire Marshal in all state-owned buildings, state-occupied buildings, and state institutions throughout the state. Upon the written request of the chief fire official of any city, county or fire protection district, the State Fire Marshal may authorize such chief fire official and his or her authorized representatives, in their geographical area of responsibility, to make fire prevention inspections of state-owned or state-occu- pied buildings, other than state institutions, for the purpose of enforcing the regulations relating to fire and panic safety adopted by the State Fire Marshal pursuant to this section and building standards relating to fire and panic safety published in the California Building Standards Code. Authorization from the State Fire Marshal shall be limited to those fire departments or fire districts which maintain a fire prevention bureau staffed by paid personnel.

Any inspection authority who, in the exercise of his or her authority as a deputy State Fire Marshal, causes any legal complaints to be filed or any arrest to be made shall notify the State Fire Marshal imme- diately following such action. 1.11.2.2 Right of Entry. The fire chief of any city, county, or fire protection district, or such person’s authorized representative, may enter any state institution or any other state-owned or state-occupied building for the purpose of preparing a fire suppression preplanning program or for the purpose of investigating any fire in a state-occupied building.

Pursuant to Health and Safety Code Section 13108, any requirement or order made by any chief fire official who is authorized by the State Fire Marshal to make fire prevention inspections of state- owned or state-occupied buildings, other than state institutions, may be appealed to the State Fire Marshal. The State Fire Marshal shall, upon receiving an appeal and subject to the provisions of Chapter 5 (commencing with Section 18945) of Part 2.5 of Division 13 of the Health and Safety Code, determine if the requirement or order made is reasonably consistent with the fire and panic safety regulations adopted by the State Fire Marshal and building standards relating to fire and panic safety published in the California Building Code.

appeal and subject to the provisions of_ Chapter 5 (commencing with Section 18945) of Part 2.5 of Division 13 of the Health and Safety Code, determine if the requirement or order made is reasonably consistent with the fire and panic safety regulations adopted by the State Fire Marshal and building standards relating to fire and panic safety published in the California Building Code.

The State Fire Marshal, his or her deputies or salaried assistants, the chief of any city or county fire department or fire protection district and his or her authorized representatives may enter any building or premises not used for dwelling purposes at any reason- able hour for the purpose of enforcing this chapter. The owner, lessee, manager or operator of any such building or premises shall permit the State Fire Marshal, his or her deputies or salaried assistants and the chief of any city or county fire department or fire protection district and his or her authorized representatives to enter and inspect them at the time and for the purpose stated in this section. 1.11.2.3 More Restrictive Fire and Panic Safety Building Standards.

Any person may request a code interpretation from the State Fire Marshal relative to the intent of any regulation or provision adopted by the State Fire Marshal. When the request relates to a specific project, occupancy or building, the State Fire Marshal shall review the issue with the appropriate local enforcing agency prior to rendering such code interpretation. 1.11.2.1.3 Pursuant to Health and Safety Code Section 13112, any person who violates any order, rule or regulation of the State Fire Marshal is guilty of a misdemeanor punishable by a fine of not less than $100.00 or more than $500.00, or by impris- onment for not less than six months, or by both. A person is guilty of a separate offense each day during which he or she commits, continues or permits a violation of any provision of, or any order, rule or regulation of, the State Fire Marshal as contained in this code.

al is guilty_ of a misdemeanor punishable by a fine of not less than $100.00 or more than $500.00, or by impris- onment for not less than six months, or by both. A person is guilty of a separate offense each day during which he or she commits, continues or permits a violation of any provision of, or any order, rule or regulation of, the State Fire Marshal as contained in this code.

1.11.2.3.1 Any fire protection district organized pursuant to Health and Safety Code Part 2.7 (commencing with Section 13800) of Division 12 may adopt building standards relating to fire and panic safety that are more stringent than those building standards adopted by the State Fire Marshal and contained in the California Building Standards Code. For these purposes, the district board shall be deemed a legislative body and the district shall be deemed a local agency. Any changes or modifications that are more stringent than the requirements published in the California Building Standards Code relating to fire and panic safety shall be subject to Section 1.1.8.1. 1.11.2.3.2 Any fire protection district that proposes to adopt an ordinance pursuant to this section shall, not less than 30 days prior to noticing a proposed ordi- nance for public hearing, provide a copy of that ordi- nance, together with the adopted findings made pursuant to Section 1.11.2.3.1, to the city, county, or city and county where the ordinance will apply. The city, county, or city and county may provide the district with written comments, which shall become part of the fire protection district’s public hearing record. 1.11.2.3.3 The fire protection district shall transmit the adopted ordinance to the city, county, or city and county where the ordinance will apply. The legisla- tive body of the city, county, or city and county may ratify, modify or deny an adopted ordinance and transmit its determination to the district within 15 days of the determination. Any modification or denial of an adopted ordinance shall include a written state- ment describing the reasons for any modifications or

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denial. No ordinance adopted by the district shall be effective until ratification by the city, county, or city and county where the ordinance will apply. Upon rati- fication of an adopted ordinance, the city, county, or city and county shall file a copy of the findings of the district, and any findings of the city, county, or city and county, together with the adopted ordinance expressly marked and identified to which each finding refers, in accordance with Section 1.1.8.1, Item 3. 1.11.2.4 Request for Alternate Means of Protection. Requests for approval to use an alternative material, assembly or materials, equipment, method of construction, method of installation of equipment or means of protec- tion shall be made in writing to the enforcing agency by the owner or the owner’s authorized representative and shall be accompanied by a full statement of the conditions. Sufficient evidence or proof shall be submitted to substan- tiate any claim that may be made regarding its confor- mance. The enforcing agency may require tests and the submission of a test report from an approved testing organization as set forth in Title 19, California Code of Regulation, to substantiate the equivalency of the proposed alternative means of protection.

movable wall or partition in any occupancy. Approval shall be granted only if there is no increase in the fire hazard. 1.11.3.3 New Construction High-Rise Buildings: (1) Complete plans or specifications, or both, shall be

prepared covering all work required to comply with

(1) Complete plans or specifications, or both, shall be

prepared covering all work required to comply with new construction high-rise buildings. Such plans and specifications shall be submitted to the enforcing agency having jurisdiction. (2) All plans and specifications shall be prepared under

the responsible charge of an architect or a civil or

When a request for alternate means of protection involves hazardous materials, the authority having juris- diction may consider implementation of the findings and recommendations identified in a Risk Management Plan (RMP) developed in accordance with Title 19, Division 2, Chapter 4.5, Article 3.

(2) All plans and specifications shall be prepared under

the responsible charge of an architect or a civil or structural engineer authorized by law to develop construction plans and specifications, or by both such architect and engineer. Plans and specifications shall be prepared by an engineer duly qualified in that branch of engineering necessary to perform such serv- ices. Administration of the work of construction shall be under the charge of the responsible architect or engineer except that where plans and specifications involve alterations or repairs, such work of construc- tion may be administered by an engineer duly quali- fied to perform such services and holding a valid certificate under Chapter 7 (commencing with Section 65700) of Division 3 of the Business and Professions Code for performance of services in that branch of engineering in which said plans, specifications and estimates and work of construction are applicable. This section shall not be construed as preventing the design of fire-extinguishing systems by persons holding a C-16 license issued pursuant to Division 3, Chapter 9, Business and Professions Code. In such instances, however, the responsibility charge of this section shall prevail. 1.11.3.4 Existing High-Rise Buildings: (1) Complete plans or specifications, or both, shall be

prepared covering all work required by Section 3412

Approval of a request for use of an alternative mate- rial, assembly of materials, equipment, method of construction, method of installation of equipment, or means of protection made pursuant to these provisions shall be limited to the particular case covered by request and shall not be construed as establishing any precedent for any future request. 1.11.2.5 Appeals. When a request for an alternate means of protection has been denied by the enforcing agency, the applicant may file a written appeal to the State Fire Marshal for consideration of the applicant’s proposal. In considering such appeal, the State Fire Marshal may seek the advice of the State Board of Fire Services. The State Fire Marshal shall, after considering all of the facts presented, including any recommendations of the State Board of Fire Services, determine if the proposal is for the purposes intended, at least equivalent to that specified in these regulations in quality, strength, effectiveness, fire resistance, durability and safety, and shall transmit such findings and any recommendations to the applicant and to the enforcing agency. 1.11.3 Construction Documents. 1.11.3.1 Public Schools. Plans and specifications for the construction, alteration, or addition to any building owned, leased, or rented by any public school district shall be submitted to the Division of the State Architect. 1.11.3.2 Movable Walls and Partitions. Plans or diagrams shall be submitted to the enforcing agency for approval before the installation of, or rearrangement of, any

(2) When new construction is required to conform with

the provisions of these regulations, complete plans or specifications, or both, shall be prepared in accor- dance with the provisions of this subsection. As used in this section, “new construction” is not intended to include repairs, replacements or minor alterations which do not disrupt or appreciably add to or affect the structural aspects of the building. 1.11.3.5 Retention of Plans. Refer to Building Standards Law, Health and Safety Code Sections 19850 and 19851 for permanent retention of plans. 1.11.4 Fees. 1.11.4.1 Other Fees. Pursuant to Health and Safety Code Section 13146.2, a city, county, or district which inspects a hotel, motel, lodging house, or apartment house may charge and collect a fee for the inspection from the owner of the structure in an amount, as determined by the city, county or district, sufficient to pay its costs of that inspec- tion.

(1) Complete plans or specifications, or both, shall be

prepared covering all work required by Section 3412 for existing high-rise buildings. Such plans or specifi- cations shall be submitted to the enforcing agency having jurisdiction. (2) When new construction is required to conform with

the provisions of these regulations, complete plans or

2019 CALIFORNIA MECHANICAL CODE 17

DIVISION I CALIFORNIA ADMINISTRATION any other purpose or distributed to any other persons or parti es.

1.11.4.2 Large Family Day Care. Pursuant to Health and Safety Code Section 1597.46, Large Family Day Care Homes, the local government shall process any required permit as economically as possible, and fees charged for review shall not exceed the costs of the review and permit process. 1.11.4.3 High-Rise. Pursuant to Health and Safety Code Section 13217, High-rise Structure Inspection: Fees and costs, a local agency which inspects a high-rise structure pursuant to Health and Safety Code Section 13217 may charge and collect a fee for the inspection from the owner of the high-rise structure in an amount, as determined by the local agency, sufficient to pay its costs of that inspec- tion. 1.11.4.4 Fire Clearance Preinspection. Pursuant to Health and Safety Code Section 13235, Fire Clearance Prein- spection fee, upon receipt of a request from a prospective licensee of a community care facility, as defined in Section 1502, of a residential care facility for the elderly, as defined in Section 1569.2, or of a child day care facility, as defined in Section 1596.750, the local fire enforcing agency, as defined in Section 13244, or State Fire Marshal, whichever has primary jurisdiction, shall conduct a preinspection of the facility prior to the final fire clearance approval. At the time of the preinspection, the primary fire enforcing agency shall price consultation and interpretation of the fire safety regulations and shall notify the prospective licensee of the facility in writing of the specific fire safety regulations which shall be enforced in order to obtain fire clearance approval. A fee of not more than $50.00 may be charged for the preinspection of a facility with a capacity to serve 25 or fewer persons. A fee of not more than $100.00 may be charged for a preinspection of a facility with a capacity to serve 26 or more persons. 1.11.4.5 Care Facilities. The primary fire enforcing agency shall complete the final fire clearance inspection for a community care facility, residential care facility for the elderly, or child day care facility within 30 days of receipt of the request for the final inspection, or as of the date the prospective facility requests the final prelicensure inspec- tion by the State Department of Social Services, whichever is later.

Pursuant to Health and Safety Code Section 13235, a preinspection fee of not more than $50.00 may be charged for a facility with a capacity to serve 25 or less clients. A fee of not more than $100.00 may be charged for a preinspec- tion of a facility with a capacity to serve 26 or more clients.

1.11.4.6 Requests of the Office of the State Fire Marshal. Whenever a local authority having jurisdiction requests that the State Fire Marshal perform plan review and/or inspection services related to a building permit, the appli- cable fees for such shall be payable to the Office of the State Fire Marshal. 1.11.5 Inspections. Work performed subject to the provisions of this code shall comply with the inspection requirements of Title 24, Part 2, California Building Standards Code, Sections 109.1, 109.3, 109.3.4, 109.3.5, 109.3.6, 109.3.8, 109.3.9, 109.3.10, 109.5, and 109.6 as adopted by the Office of the State Fire Marshal.

1.11.5.1 Existing Group I-1 or R Occupancies. Licensed 24-hour care in a Group I-1 or R occupancy in existence and originally classified under previously adopted state codes shall be reinspected under the appropriate previous code, provided there is no change in the use or character which would place the facility in a different occupancy group. 1.11.6 Certificate of Occupancy. A Certificate of Occupancy shall be issued as specified in Title 24, Part 2, California Building Code, Section 111. Exception: Group R, Division 3 and Group U occupancies. 1.11.7 Temporary Structures and Uses. See Title 24, Part 2, California Building Code, Section 107. 1.11.8 Service Utilities. See Title 24, Part 2, California Building Code, Section 112. 1.11.9 Stop Work Order. See Title 24, Part 2, California Building Code, Section 115. 1.11.10 Unsafe Buildings, Structures, and Equipment. See Title 24, Part 2, California Building Code, Section 116. 1.11.11 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Section 1.11.0 will be identified in the Matrix Adoption Tables under the acronym SFM.

1.12.0 Reserved for the State Librarian.

1.13.0 Reserved for the Department of Water Resources.

1.14.0 Reserved for the State Lands Commission.

Pursuant to Health and Safety Code Section 13131.5, a reasonable final inspection fee, not to exceed the actual cost of inspection services necessary to complete a final inspection may be charged for occupancies classified as Residential Care Facilities for the Elderly (RCFE).

Pursuant to Health and Safety Code Section 1569.84, neither the State Fire Marshal nor any local public entity shall charge any fee for enforcing fire inspection regula- tions pursuant to state law or regulation or local ordinance, with respect to Residential Care Facilities for the Elderly (RCFE) which service six or fewer persons.

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105.0 Inspections and Testing.105.1 General. Mechanical systems for which a permit is

required by this code shall be inspected by the Authority Having Jurisdiction.

One set of approved construction documents, computations, and manufacturer’s installation instructions shall be returned to the applicant, and said set shall be kept on the site of the building or work at times during which the work authorized thereby is in progress.

106.0 Violations and Penalties.106.1 General. It shall be unlawful for a person, firm, or

corporation to erect, construct, enlarge, alter, repair, move, improve, remove, convert, demolish, equip, use, or maintain a mechanical system or permit the same to be done in violation of this code.

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Contents — California Mechanical Code (Title 24, Part 4)
California Mechanical Code (Title 24, Part 4)
  1. Chapter 1 — GENERAL CODE PROVISIONS
    Overview
    1. 101.1 Title.101.0 General. This document shall be known as the…
    2. 101.2 Scope. The provisions of this code shall apply to the
    3. 101.3 Purpose. This code is an ordinance providing minimum req…
    4. 101.4 Unconstitutional. Where a section, subsection, sentence,…
    5. 101.5 Validity. Where a provision of this code, or the applica…
    6. 102.1 Conflicts Between Codes.102.0 Applicability. Where the r…
    7. 102.2 Existing Installations. Mechanical systems lawfully in e…
    8. 102.3 Maintenance. Mechanical systems, materials, and
    9. 102.4 Additions, Alterations, Renovations, orRepairs. Addition…
    10. 102.5 Health and Safety. Where compliance with the provisions …
    11. 102.6 Changes in Building Occupancy. Mechanical
    12. 102.7 Moved Structures. Parts of the mechanical system of
    13. 102.8 Appendices. The provisions in the appendices are
    14. 103.0 Duties and Powers of the Authority Having
    15. 103.2 Liability. The Authority Having Jurisdiction charged
    16. 103.3 Applications and Permits. The Authority Having
    17. 104.1 Permits Required. 104.0 Permits. It shall be unlawful fo…
    18. 104.2 Exempt Work. A permit shall not be required for the
    19. 103.4 Right of Entry. Where it is necessary to make an
    20. 104.3 Application for Permit. To obtain a permit, the
    21. 104.4 Permit Issuance. The application, construction documents…
    22. 105.2 Required Inspections. New mechanical system
    23. 104.5 Fees. Fees shall be assessed in accordance with the
    24. 105.4 Connection to Service Utilities. No person shall
    25. 106.2 Notices of Correction or Violation. Notices of
    26. 106.3 Penalties. A person, firm, or corporation violating a
    27. 106.4 Stop Orders. Where work is being done contrary to
    28. 105.3 Testing of Systems. Mechanical systems shall be
    29. 106.6 Authority to Condemn. Where the Authority Having Jurisdi…
    30. 107.0 Board of Appeals.107.1 General. In order to hear and dec…
    31. 107.2 Limitations of Authority. The Board of Appeals
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GENERAL REGULATIONS
  4. Chapter 4 — VENTILATION AIR
  5. Chapter 5 — EXHAUST SYSTEMS
  6. Chapter 6 — DUCT SYSTEMS
  7. Chapter 7 — COMBUSTION AIR
  8. Chapter 8 — CHIMNEYS AND VENTS
  9. Chapter 9 — INSTALLATION OF SPECIFIC APPLIANCES
  10. Chapter 10 — BOILERS AND PRESSURE VESSELS
  11. Chapter 11 — REFRIGERATION
  12. Chapter 12 — HYDRONICS
  13. Chapter 13 — FUEL GAS PIPING
  14. Chapter 14 — PROCESS PIPING
  15. Chapter 15 — SOLAR ENERGY SYSTEMS
  16. Chapter 16 — STATIONARY POWER PLANTS
  17. Chapter 17 — REFERENCED STANDARDS
  18. Appendix A — RESIDENTIAL PLAN EXAMINER REVIEW FORM FOR HVAC SY…
  19. Appendix B — PROCEDURES TO BE FOLLOWED TO PLACE GAS EQUIPMENT …
  20. Appendix C — INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIR…
  21. Appendix D — FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND R…
  22. Appendix E — SUSTAINABLE PRACTICES
  23. Appendix F — SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION …
  24. Appendix G — EXAMPLE CALCULATION OF OUTDOOR AIR RATE

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