Chapter 2 — DEFINITIONS AND ABBREVIATIONS

Adopting agency	BSC	BSC- CG	SFM	HCD			DSA			OSHPD						BSCC	DPH	AGR	DWR	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
Adopt entire chapter			X
Adopt entire chapter as amended (amended sections listed below)
Adopt only those sections that are listed below								S	A	M	P	L	E
Chapter/Section

Adopt the entire IRC chapter as amended, state-amended sections are listed below:

If there is an “X” under a particular state agency’s acronym on this row, it means that 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:

CHAPTER 2 – DEFINITIONS AND ABBREVIATIONS

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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Adopt only those sections that are listed below:

If there is an “X” under a particular state agency’s acronym on 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:

CHAPTER 2 – DEFINITIONS AND ABBREVIATIONS

Adopting agency	BSC	BSC- CG	SFM	HCD			DSA			OSHPD						BSCC	DPH	AGR	DWR	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
Adopt entire chapter
Adopt entire chapter as amended (amended sections listed below)
Adopt only those sections that are listed below					X	X		S	A	M	P	L	E
Chapter 1
202					X	X		S	A	M	P	L	E
202					X	X			C	O	N	T.
203					X	X
203					X	X

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Marginal Markings

Maintenance

en relocated there from elsewher 2018 edition of the International 2018 LOCATION	re in the code. The following tabl Residential Code. 2015 LOCATION
2018 LOCATION	2015 LOCATION
R703.3.1.2	R703.11.1.4

The International Residential Code is kept up-to-date through the review of proposed changes submitted by code enforcement officials, industry representatives, design professionals and other interested parties. Proposed changes are carefully considered through an open code development process in which all interested and affected parties may participate.

The ICC Code Development Process reflects principles of openness, transparency, balance, due process and consensus, the principles embodied in OMB Circular A-119, which governs the federal government’s use of private-sector standards. The ICC process is open to anyone; there is no cost to participate, and people can participate without travel cost through the ICC’s cloud-based app, cdpAccess . A broad cross section of interests are represented in the ICC Code Development Process. The codes, which are updated regularly, include safeguards that allow for emergency action when required for health and safety reasons.

In order to ensure that organizations with a direct and material interest in the codes have a voice in the process, the ICC has developed partnerships with key industry segments that support the ICC’s important public safety mission. Some code development committee members were nominated by the following industry partners and approved by the ICC Board:

        - National Association of Home Builders (NAHB)

        - National Council of Structural Engineers Association (NCSEA)

The code development committees evaluate and make recommendations regarding proposed changes to the codes. Their recommendations are then subject to public comment and council-wide votes. The ICC’s governmental members—public safety officials who have no financial or business interest in the outcome—cast the final votes on proposed changes.

The contents of this work are subject to change through the code development cycles and by any governmental entity that enacts the code into law. For more information regarding the code development process, contact the Codes and Standards Development Department of the International Code Council.

The maintenance process for the fuel gas provisions is based on the process used to maintain the International Fuel Gas Code, in conjunction with the American Gas Association. The maintenance process for the electrical provisions is undertaken by the National Fire Protection Association.

While the I-Code development procedure is thorough and comprehensive, the ICC, its members and those participating in the development of the codes disclaim any liability resulting from the publication or use of the I-Codes, or from compliance or noncompliance with their provisions. The ICC does not have the power or authority to police or enforce compliance with the contents of this code.

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Code Development Committee Responsibilities (Letter Designations in Front of Section Numbers)

In each code development cycle, proposed changes to the code are considered at the Committee Action Hearings by the applicable International Code Development Committee as follows:

[RB] = IRC—Building Code Development Committee

[RE] = International Residential Energy Conservation Code Development Committee;

[MP] = IRC—Mechanical/Plumbing Code Development Committee

The [RE] committee is also responsible for the IECC—Residential Provisions and Appendix T.

For the development of the 2021 edition of the I- opment committees and they will meet in separate	-Codes, there will be three groups of code devel- years. Note that these are tentative groupings.
Group A Codes (Heard in 2018, Code Change Proposals Deadline: January 8, 2018)	Group B Codes (Heard in 2019, Code Change Proposals Deadline: January 7, 2019)
International Building Code – Egress (Chapters 10, 11, Appendix E) – Fire Safety (Chapters 7, 8, 9, 14, 26) – General (Chapters 2–6, 12, 27–33, Appendices A, B, C, D, K, N)	Administrative Provisions (Chapter 1 of all codes except IECC, IRC and IgCC, administra- tive updates to currently referenced stan- dards, and designated definitions)
International Fire Code	International Building Code – Structural (Chapters 15–25, Appendices F, G, H, I, J, L, M)
International Fuel Gas Code	International Existing Building Code
International Mechanical Code	International Energy Conservation Code— Commercial
International Plumbing Code	International Energy Conservation Code— Residential – IECC—Residential – IRC—Energy (Chapter 11)
International Property Maintenance Code	International Green Construction Code (Chapter 1)
International Private Sewage Disposal Code	International Residential Code – IRC—Building (Chapters 1–10, Appendices E, F, H, J, K, L, M, O, Q, R, S, T)
International Residential Code – IRC—Mechanical (Chapters 12–23) – IRC—Plumbing (Chapters 25–33, Appendices G, I, N, P)
International Swimming Pool and Spa Code
International Wildland-Urban Interface Code
International Zoning Code
Note: Proposed changes to the ICC_Performance Code_ will be heard by the code development committee noted in brack- ets [ ] in the text of the ICC_Performance Code_.

Code change proposals submitted to Chapters 1 and 3 through 10, Appendices E, F, H, J, K, L, M, O, Q, R, S, T and Definitions designated [RB] of the International Residential Code are heard by the IRC—Building Committee during the Group B (2019) cycle code development hearing. Code change proposals submitted to Chapter 11 are heard by the International Energy Conservation Code Development Committee during the Group B (2019) cycle code development hearing. Proposed changes to all other chapters are heard by the IRC Plumbing and Mechanical Committee during the Group A (2018) code development cycle.

It is very important that anyone submitting code change proposals understand which code development committee is responsible for the section of the code that is the subject of the code change proposal. For further information on the code development committee responsibilities, please visit the ICC website at www.iccsafe.org/scoping.

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EFFECTIVE USE OF THE INTERNATIONAL RESIDENTIAL CODE

Effective Use of the International Residential Code

The International Residential Code (IRC ) was created to serve as a complete, comprehensive code regulating the construction of single-family houses, two-family houses (duplexes) and buildings consisting of three or more townhouse units. All buildings within the scope of the IRC are limited to three stories above grade plane. For example, a four-story single-family house would fall within the scope of the International Building Code (IBC ), not the IRC. The benefits of devoting a separate code to residential construction include the fact that the user need not navigate through a multitude of code provisions that do not apply to residential construction in order to locate that which is applicable. A separate code also allows for residential and nonresidential code provisions to be distinct and tailored to the structures that fall within the appropriate code’s scopes.

The IRC contains coverage for all components of a house or townhouse, including structural components, fireplaces and chimneys, thermal insulation, mechanical systems, fuel gas systems, plumbing systems and electrical systems.

The IRC is a prescriptive-oriented (specification) code with some examples of performance code language. It has been said that the IRC is the complete cookbook for residential construction. Section R301.1, for example, is written in performance language, but states that the prescriptive requirements of the code will achieve such performance.

It is important to understand that the IRC contains coverage for what is conventional and common in residential construction practice. While the IRC will provide all of the needed coverage for most residential construction, it might not address construction practices and systems that are atypical or rarely encountered in the industry. Sections such as R301.1.3, R301.2.2.1.1, R320.1, M1301.1, G2401.1 and P2601.1 refer to other codes either as an alternative to the provisions of the IRC or where the IRC lacks coverage for a particular type of structure, design, system, appliance or method of construction. In other words, the IRC is meant to be all inclusive for typical residential construction and it relies on other codes only where alternatives are desired or where the code lacks coverage for the uncommon aspect of residential construction. Of course, the IRC constantly evolves to address new technologies and construction practices that were once uncommon, but are now common.

thod of construction. In other words, the IRC is meant to be all inclusive for typical residential construction and it relies on other codes only where alternatives are desired or where the code lacks coverage for the uncommon aspect of residential construction. Of course, the IRC constantly evolves to address new technologies and construction practices that were once uncommon, but are now common.

The IRC is unique in that much of it, including Chapters 3 through 9 and Chapters 34 through 43, is presented in an ordered format that is consistent with the normal progression of construction, starting with the design phase and continuing through the final trim-out phase. This is consistent with the “cookbook” philosophy of the IRC.

The IRC is divided into eight main parts, specifically: Part I—Administration; Part II—Definitions; Part III—Building Planning and Construction; Part IV—Energy Conservation; Part V—Mechanical; Part VI—Fuel Gas; Part VII—Plumbing; and Part VIII—Electrical.

The following provides a brief description of the content of each chapter and appendix of the IRC:

Chapter 1 Scope and Administration. This chapter contains provisions for the application, enforcement and administration of subsequent requirements of the code. In addition to establishing the scope of the code, Chapter 1 identifies which buildings and structures come under its purview. Chapter 1 is largely concerned with maintaining “due process of law” in enforcing the building criteria contained in the body of the code. Only through careful observation of the administrative provisions can the building official reasonably expect to demonstrate that “equal protection under the law” has been provided.

Chapter 2 Definitions. Terms defined in the code are listed alphabetically in Chapter 2. It is important to note that two chapters have their own definitions sections: Chapter 11 for the defined terms unique to energy conservation, Chapter 24 for the defined terms that are unique to fuel gas and Chapter 35 containing terms that are applicable to electrical Chapters 34 through 43. Where Chapter 24 or 35 defines a term differently than it is defined in Chapter 2, the definition applies in that chapter only. Chapter 2 definitions apply in all other locations in the code.

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Where understanding a term’s definition is key to or necessary for understanding a particular code provision, the term is shown in italics where it appears in the code. This is true only for those terms that have a meaning that is unique to the code. In other words, the generally understood meaning of a term or phrase might not be sufficient or consistent with the meaning prescribed by the code; therefore, it is essential that the code-defined meaning be known.

Guidance regarding not only tense, gender and plurality of defined terms, but also terms not defined in this code, is provided.

Chapter 3 Building Planning. Chapter 3 provides guidelines for a minimum level of structural integrity, life safety, fire safety and livability for inhabitants of dwelling units regulated by this code. Chapter 3 is a compilation of the code requirements specific to the building planning sector of the design and construction process. This chapter sets forth code requirements dealing with light, ventilation, sanitation, minimum room size, ceiling height and environmental comfort. Chapter 3 establishes life-safety provisions including limitations on glazing used in hazardous areas, specifications on stairways, use of guards at elevated surfaces, window and fall protection, and rules for means of egress. Snow, wind and seismic design live and dead loads and flood-resistant construction, as well as solar energy systems, and swimming pools, spas and hot tubs, are addressed in this chapter.

Chapter 4 Foundations. Chapter 4 provides the requirements for the design and construction of foundation systems for buildings regulated by this code. Provisions for seismic load, flood load and frost protection are contained in this chapter. A foundation system consists of two interdependent components: the foundation structure itself and the supporting soil.

The prescriptive provisions of this chapter provide requirements for constructing footings and walls for foundations of wood, masonry, concrete and precast concrete. In addition to a foundation's ability to support the required design loads, this chapter addresses several other factors that can affect foundation performance. These include controlling surface water and subsurface drainage, requiring soil tests where conditions warrant and evaluating proximity to slopes and minimum depth requirements. The chapter also provides requirements to minimize adverse effects of moisture, decay and pests in basements and crawl spaces.

Chapter 5 Floors. Chapter 5 provides the requirements for the design and construction of floor systems that will be capable of supporting minimum required design loads. This chapter covers four different types: wood floor framing, wood floors on the ground, cold-formed steel floor framing and concrete slabs on the ground. Allowable span tables are provided that greatly simplify the determination of joist, girder and sheathing sizes for raised floor systems of wood framing and cold-formed steel framing. This chapter also contains prescriptive requirements for wood-framed exterior decks and their attachment to the main building.

d floors on the ground, cold-formed steel floor framing and concrete slabs on the ground. Allowable span tables are provided that greatly simplify the determination of joist, girder and sheathing sizes for raised floor systems of wood framing and cold-formed steel framing. This chapter also contains prescriptive requirements for wood-framed exterior decks and their attachment to the main building.

Chapter 6 Wall Construction. Chapter 6 contains provisions that regulate the design and construction of walls. The wall construction covered in Chapter 6 consists of five different types: wood framed, cold-formed steel framed, masonry, concrete and structural insulated panel (SIP). The primary concern of this chapter is the structural integrity of wall construction and transfer of all imposed loads to the supporting structure. This chapter provides the requirements for the design and construction of wall systems that are capable of supporting the minimum design vertical loads (dead, live and snow loads) and lateral loads (wind or seismic loads). This chapter contains the prescriptive requirements for wall bracing and/or shear walls to resist the imposed lateral loads due to wind and seismic.

Chapter 6 also regulates exterior windows and doors installed in walls. This chapter contains criteria for the performance of exterior windows and doors and includes provisions for testing and labeling, garage doors, wind-borne debris protection and anchorage details.

Chapter 7 Wall Covering. Chapter 7 contains provisions for the design and construction of interior and exterior wall coverings. This chapter establishes the various types of materials, materials standards and methods of application permitted for use as interior coverings, including interior plaster, gypsum board, ceramic tile, wood veneer paneling, hardboard paneling, wood shakes and wood shingles. Chapter 7 also contains requirements for the use of vapor retarders for moisture control in walls.

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Exterior wall coverings provide the weather-resistant exterior envelope that protects the building’s interior from the elements. Chapter 7 provides the requirements for wind resistance and water-resistive barrier for exterior wall coverings. This chapter prescribes the exterior wall coverings as well as the water-resistive barrier required beneath the exterior materials. Exterior wall coverings regulated by this section include aluminum, stone and masonry veneer, wood, hardboard, particleboard, wood structural panel siding, wood shakes and shingles, exterior plaster, steel, vinyl, fiber cement and exterior insulation finish systems.

. This chapter prescribes the exterior wall coverings as well as the water-resistive barrier required beneath the exterior materials. Exterior wall coverings regulated by this section include aluminum, stone and masonry veneer, wood, hardboard, particleboard, wood structural panel siding, wood shakes and shingles, exterior plaster, steel, vinyl, fiber cement and exterior insulation finish systems.

Chapter 8 Roof-ceiling Construction. Chapter 8 regulates the design and construction of roofceiling systems. This chapter contains two roof-ceiling framing systems: wood framing and coldformed steel framing. Allowable span tables are provided to simplify the selection of rafter and ceiling joist size for wood roof framing and cold-formed steel framing. Chapter 8 also provides requirements for the application of ceiling finishes, the proper ventilation of concealed spaces in roofs (e.g., enclosed attics and rafter spaces), unvented attic assemblies and attic access.

Chapter 9 Roof Assemblies. Chapter 9 regulates the design and construction of roof assemblies. A roof assembly includes the roof deck, vapor retarder, substrate or thermal barrier, insulation, vapor retarder and roof covering. This chapter provides the requirement for wind resistance of roof coverings.

The types of roof covering materials and installation regulated by Chapter 9 are: asphalt shingles, clay and concrete tile, metal roof shingles, mineral-surfaced roll roofing, slate and slate-type shingles, wood shakes and shingles, built-up roofs, metal roof panels, modified bitumen roofing, thermoset and thermoplastic single-ply roofing, sprayed polyurethane foam roofing, liquid applied coatings and photovoltaic shingles. Chapter 9 also provides requirements for roof drainage, flashing, above deck thermal insulation, rooftop-mounted photovoltaic systems and recovering or replacing an existing roof covering.

Chapter 10 Chimneys and Fireplaces. Chapter 10 contains requirements for the safe construction of masonry chimneys and fireplaces and establishes the standards for the use and installation of factory-built chimneys, fireplaces and masonry heaters. Chimneys and fireplaces constructed of masonry rely on prescriptive requirements for the details of their construction; the factory-built type relies on the listing and labeling method of approval. Chapter 10 provides the requirements for seismic reinforcing and anchorage of masonry fireplaces and chimneys.

Chapter 11 [RE] Energy Efficiency. The purpose of Chapter 11 [RE] is to provide minimum design requirements that will promote efficient utilization of energy in buildings. The requirements are directed toward the design of building envelopes with adequate thermal resistance and low air leakage, and toward the design and selection of mechanical, water heating, electrical and illumination systems that promote effective use of depletable energy resources. The provisions of Chapter 11 [RE] are duplicated from the International Energy Conservation Code—Residential Provisions, as applicable for buildings which fall under the scope of the IRC.

adequate thermal resistance and low air leakage, and toward the design and selection of mechanical, water heating, electrical and illumination systems that promote effective use of depletable energy resources. The provisions of Chapter 11 [RE] are duplicated from the International Energy Conservation Code—Residential Provisions, as applicable for buildings which fall under the scope of the IRC.

For ease of use and coordination of provisions, the corresponding IECC—Residential Provisions section number is indicated following the IRC section number [e.g. N1102.1 (R402.1)].

Chapter 12 Mechanical Administration. Chapter 12 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. A mechanical code, like any other code, is intended to be adopted as a legally enforceable document and it cannot be effective without adequate provisions for its administration and enforcement. The provisions of Chapter 12 establish the authority and duties of the code official appointed by the jurisdiction having authority and also establish the rights and privileges of the design professional, contractor and property owner. It also relates this chapter to the administrative provisions in Chapter 1.

Chapter 13 General Mechanical System Requirements. Chapter 13 contains broadly applicable requirements related to appliance listing and labeling, appliance location and installation, appliance and systems access, protection of structural elements and clearances to combustibles, among others.

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Chapter 14 Heating and Cooling Equipment and Appliances. Chapter 14 is a collection of requirements for various heating and cooling appliances, dedicated to single topics by section. The common theme is that all of these types of appliances use energy in one form or another, and the improper installation of such appliances would present a hazard to the occupants of the dwellings, due to either the potential for fire or the accidental release of refrigerants. Both situations are undesirable in dwellings that are covered by this code.

Chapter 15 Exhaust Systems. Chapter 15 is a compilation of code requirements related to residential exhaust systems, including kitchens and bathrooms, clothes dryers and range hoods. The code regulates the materials used for constructing and installing such duct systems. Air brought into the building for ventilation, combustion or makeup purposes is protected from contamination by the provisions found in this chapter.

ems.** Chapter 15 is a compilation of code requirements related to residential exhaust systems, including kitchens and bathrooms, clothes dryers and range hoods. The code regulates the materials used for constructing and installing such duct systems. Air brought into the building for ventilation, combustion or makeup purposes is protected from contamination by the provisions found in this chapter.

Chapter 16 Duct Systems. Chapter 16 provides requirements for the installation of ducts for supply, return and exhaust air systems. This chapter contains no information on the design of these systems from the standpoint of air movement, but is concerned with the structural integrity of the systems and the overall impact of the systems on the fire-safety performance of the building. This chapter regulates the materials and methods of construction which affect the performance of the entire air distribution system.

Chapter 17 Combustion Air. Complete combustion of solid and liquid fuel is essential for the proper operation of appliances, control of harmful emissions and achieving maximum fuel efficiency. If insufficient quantities of oxygen are supplied, the combustion process will be incomplete, creating dangerous byproducts and wasting energy in the form of unburned fuel (hydrocarbons). The byproducts of incomplete combustion are poisonous, corrosive and combustible, and can cause serious appliance or equipment malfunctions that pose fire or explosion hazards.

The combustion air provisions in this code from previous editions have been deleted from Chapter 17 in favor of a single section that directs the user to NFPA 31 for oil-fired appliance combustion air requirements and the manufacturer's installation instructions for solid fuel-burning appliances. If fuel gas appliances are used, the provisions of Chapter 24 must be followed.

Chapter 18 Chimneys and Vents. Chapter 18 regulates the design, construction, installation, maintenance, repair and approval of chimneys, vents and their connections to fuel-burning appliances. A properly designed chimney or vent system is needed to conduct the flue gases produced by a fuel-burning appliance to the outdoors. The provisions of this chapter are intended to minimize the hazards associated with high temperatures and potentially toxic and corrosive combustion gases. This chapter addresses factory-built and masonry chimneys, vents and venting systems used to vent oil-fired and solid fuel-burning appliances.

Chapter 19 Special Appliances, Equipment and Systems. Chapter 19 regulates the installation of fuel-burning appliances that are not covered in other chapters, such as ranges and ovens, sauna heaters, fuel cell power plants and hydrogen systems. Because the subjects in this chapter do not contain the volume of text necessary to warrant individual chapters, they have been combined into a single chapter. The only commonality is that the subjects use energy to perform some task or function. The intent is to provide a reasonable level of protection for the occupants of the dwelling.

sauna heaters, fuel cell power plants and hydrogen systems. Because the subjects in this chapter do not contain the volume of text necessary to warrant individual chapters, they have been combined into a single chapter. The only commonality is that the subjects use energy to perform some task or function. The intent is to provide a reasonable level of protection for the occupants of the dwelling.

Chapter 20 Boilers and Water Heaters. Chapter 20 regulates the installation of boilers and water heaters. Its purpose is to protect the occupants of the dwelling from the potential hazards associated with such appliances. A water heater is any appliance that heats potable water and supplies it to the plumbing hot water distribution system. A boiler either heats water or generates steam for space heating and is generally a closed system.

Chapter 21 Hydronic Piping. Hydronic piping includes piping, fittings and valves used in building space conditioning systems. Applications include hot water, chilled water, steam, steam condensate, brines and water/antifreeze mixtures. Chapter 21 regulates installation, alteration and repair of all hydronic piping systems to ensure the reliability, serviceability, energy efficiency and safety of such systems.

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Chapter 22 Special Piping and Storage Systems. Chapter 22 regulates the design and installation of fuel oil storage and piping systems. The regulations include reference to construction standards for above-ground and underground storage tanks, material standards for piping systems (both above-ground and underground) and extensive requirements for the proper assembly of system piping and components. The purpose of this chapter is to prevent fires, leaks and spills involving fuel oil storage and piping systems, whether inside or outside structures and above or underground.

Chapter 23 Solar Thermal Energy Systems. Chapter 23 contains requirements for the construction, alteration and repair of all systems and components of solar thermal energy systems used for space heating or cooling, and domestic hot water heating or processing. The provisions of this chapter are limited to those necessary to achieve installations that are relatively hazard free.

A solar thermal energy system can be designed to handle 100 percent of the energy load of a building, although this is rarely accomplished. Because solar energy is a low-intensity energy source and dependent on the weather, it is usually necessary to supplement a solar thermal energy system with traditional energy sources.

As our world strives to find alternate means of producing power for the future, the requirements of this chapter will become more and more important over time.

Chapter 24 Fuel Gas. Chapter 24 regulates the design and installation of fuel gas distribution piping and systems, appliances, appliance venting systems and combustion air provisions. The definition of “Fuel gas” includes natural, liquefied petroleum and manufactured gases and mixtures of these gases.

The purposes of this chapter are to establish the minimum acceptable level of safety and to protect life and property from the potential dangers associated with the storage, distribution and use of fuel gases and the byproducts of combustion of such fuels. This code also protects the personnel who install, maintain, service and replace the systems and appliances addressed herein.

Chapter 24 is composed entirely of text extracted from the IFGC; therefore, whether using the IFGC or the IRC, the fuel gas provisions will be identical. Note that to avoid the potential for confusion and conflicting definitions, Chapter 24 has its own definition section.

Chapter 25 Plumbing Administration. The requirements of Chapter 25 do not supersede the administrative provisions of Chapter 1. Rather, the administrative guidelines of Chapter 25 pertain to plumbing installations that are best referenced and located within the plumbing chapters. This chapter addresses how to apply the plumbing provisions of this code to specific types or phases of construction. This chapter also outlines the responsibilities of the applicant, installer and inspector with regard to testing plumbing installations.

Chapter 26 General Plumbing Requirements. The content of Chapter 26 is often referred to as “miscellaneous,” rather than general plumbing requirements. This is the only chapter of the plumbing chapters of the code whose requirements do not interrelate. If a requirement cannot be located in another plumbing chapter, it should be located in this chapter. Chapter 26 contains safety requirements for the installation of plumbing systems and includes requirements for the identification of pipe, pipe fittings, traps, fixtures, materials and devices used in plumbing systems. If specific provisions do not demand that a requirement be located in another chapter, the requirement is located in this chapter.

Chapter 27 Plumbing Fixtures. Chapter 27 requires fixtures to be of the proper type, approved for the purpose intended and installed properly to promote usability and safe, sanitary conditions. This chapter regulates the quality of fixtures and faucets by requiring those items to comply with nationally recognized standards. Because fixtures must be properly installed so that they are usable by the occupants of the building, this chapter contains the requirements for the installation of fixtures.

e purpose intended and installed properly to promote usability and safe, sanitary conditions. This chapter regulates the quality of fixtures and faucets by requiring those items to comply with nationally recognized standards. Because fixtures must be properly installed so that they are usable by the occupants of the building, this chapter contains the requirements for the installation of fixtures.

Chapter 28 Water Heaters. Chapter 28 regulates the design, approval and installation of water heaters and related safety devices. The intent is to minimize the hazards associated with the installation and operation of water heaters. Although this chapter does not regulate the size of a water heater, it does regulate all other aspects of the water heater installation such as temperature and pressure relief valves, safety drip pans and connections. Where a water heater also supplies water

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for space heating, this chapter regulates the maximum water temperature supplied to the water distribution system.

Chapter 29 Water Supply and Distribution. This chapter regulates the supply of potable water from both public and individual sources to every fixture and outlet so that it remains potable and uncontaminated by cross connections. Chapter 29 also regulates the design of the water distribution system, which will allow fixtures to function properly. Because it is critical that the potable water supply system remain free of actual or potential sanitary hazards, this chapter has the requirements for providing backflow protection devices.

Chapter 30 Sanitary Drainage. The purpose of Chapter 30 is to regulate the materials, design and installation of sanitary drainage piping systems as well as the connections made to the system. The intent is to design and install sanitary drainage systems that will function reliably, are neither undersized nor oversized and are constructed from materials, fittings and connections whose quality is regulated by this section. This chapter addresses the proper use of fittings for directing the flow into and within the sanitary drain piping system. Materials and provisions necessary for servicing the drainage system are also included in this chapter.

ms that will function reliably, are neither undersized nor oversized and are constructed from materials, fittings and connections whose quality is regulated by this section. This chapter addresses the proper use of fittings for directing the flow into and within the sanitary drain piping system. Materials and provisions necessary for servicing the drainage system are also included in this chapter.

Chapter 31 Vents. Venting protects the trap seal of each trap. The vents are designed to limit differential pressures at each trap to 1 inch of water column (249 Pa). Because waste flow in the drainage system creates pressure fluctuations that can negatively affect traps, the sanitary drainage system must have a properly designed venting system. Chapter 31 covers the requirements for vents and venting. All of the provisions set forth in this chapter are intended to limit the pressure differentials in the drainage system to a maximum of 1 inch of water column (249 Pa) above or below atmospheric pressure (i.e., positive or negative pressures).

Chapter 32 Traps. Traps prevent sewer gas from escaping from the drainage piping into the building. Water seal traps are the simplest and most reliable means of preventing sewer gas from entering the interior environment. This chapter lists prohibited trap types and specifies the minimum trap size for each type of fixture.

Chapter 33 Storm Drainage. Rainwater infiltration into the ground adjacent to a building can cause the interior of foundation walls to become wet. The installation of a subsoil drainage system prevents the buildup of rainwater on the exterior of the foundation walls. This chapter provides the specifications for subsoil drain piping. Where the discharge of the subsoil drain system is to a sump, this chapter also provides coverage for sump construction, pumps and discharge piping.

Chapter 34 General Requirements. This chapter contains broadly applicable, general and miscellaneous requirements including scope, listing and labeling, equipment locations and clearances for conductor materials and connections and conductor identification.

Chapter 35 Electrical Definitions. Chapter 35 is the repository of the definitions of terms used in the body of Part VIII of the code. To avoid the potential for confusion and conflicting definitions, Part VIII, Electrical, has its own definition chapter.

Codes are technical documents and every word, term and punctuation mark can impact the meaning of the code text and the intended results. The code often uses terms that have a unique meaning in the code, which can differ substantially from the ordinarily understood meaning of the term as used outside of the code.

The terms defined in Chapter 35 are deemed to be of prime importance in establishing the meaning and intent of the electrical code text that uses the terms. The user of the code should be familiar with and consult this chapter because the definitions are essential to the correct interpretation of the code and because the user may not be aware that a term is defined.

Chapter 36 Services. This chapter covers the design, sizing and installation of the building’s electrical service equipment and grounding electrode system. It includes an easy-to-use load calculation method and service conductor sizing table. The electrical service is generally the first part of the electrical system to be designed and installed.

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Chapter 37 Branch Circuit and Feeder Requirements. Chapter 37 addresses the requirements for designing the power distribution system, which consists of feeders and branch circuits emanating from the service equipment. This chapter dictates the ratings of circuits and the allowable loads, the number and types of branch circuits required, the wire sizing for such branch circuits and feeders and the requirements for protection from overcurrent for conductors. A load calculation method specific to feeders is also included. This chapter is used to design the electrical system on the load side of the service.

Chapter 38 Wiring Methods. Chapter 38 specifies the allowable wiring methods, such as cable, conduit and raceway systems, and provides the installation requirements for the wiring methods. This chapter is primarily applicable to the “rough-in” phase of construction.

Chapter 39 Power and Lighting Distribution. This chapter mostly contains installation requirements for the wiring that serves the lighting outlets, receptacle outlets, appliances and switches located throughout the building. The required distribution and spacing of receptacle outlets and lighting outlets is prescribed in this chapter, as well as the requirements for ground-fault and arc-fault circuit-interrupter protection.

Chapter 40 Devices and Luminaires. This chapter focuses on the devices, including switches and receptacles, and lighting fixtures that are typically installed during the final phase of construction.

Chapter 41 Appliance Installation. Chapter 41 addresses the installation of appliances including HVAC appliances, water heaters, fixed space-heating equipment, dishwashers, garbage disposals, range hoods and suspended paddle fans.

Chapter 42 Swimming Pools. This chapter covers the electrical installation requirements for swimming pools, storable swimming pools, wading pools, decorative pools, fountains, hot tubs, spas and hydromassage bathtubs. The allowable wiring methods are specified along with the required clearances between electrical system components and pools, spas and tubs. This chapter includes the special grounding requirements related to pools, spas and tubs, and also prescribes the equipotential bonding requirements that are unique to pools, spas and tubs.

Chapter 43 Class 2 Remote-control, Signaling and Power-limited Circuits. This chapter covers the power supplies, wiring methods and installation requirements for the Class 2 circuits found in dwellings. Such circuits include thermostat wiring, alarm systems, security systems, automated control systems and doorbell systems.

Chapter 44 Referenced Standards. The code contains numerous references to standards that are used to regulate materials and methods of construction. Chapter 44 contains a comprehensive list of all standards that are referenced in the code. The standards are part of the code to the extent of the reference to the standard. Compliance with the referenced standard is necessary for compliance with this code. By providing specifically adopted standards, the construction and installation requirements necessary for compliance with the code can be readily determined. The basis for code compliance is, therefore, established and available on an equal basis to the code official, contractor, designer and owner.

Chapter 44 is organized in a manner that makes it easy to locate specific standards. It lists all of the referenced standards, alphabetically, by acronym of the promulgating agency of the standard. Each agency’s standards are then listed in either alphabetical or numeric order based upon the standard identification. The list also contains the title of the standard; the edition (date) of the standard referenced; any addenda included as part of the ICC adoption; and the section or sections of this code that reference the standard.

Appendix A Sizing and Capacities of Gas Piping. This appendix is informative and not part of the code. It provides design guidance, useful facts and data and multiple examples of how to apply the sizing tables and sizing methodologies of Chapter 24.

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Appendix B Sizing of Venting Systems Serving Appliances Equipped with Draft Hoods, Category I Appliances, and Appliances Listed for Use with Type B Vents. This appendix is informative and not part of the code. It contains multiple examples of how to apply the vent and chimney tables and methodologies of Chapter 24.

Appendix C Exit Terminals of Mechanical Draft and Direct-vent Venting Systems. This appendix is informative and not part of the code. It consists of a figure and notes that visually depict code requirements from Chapter 24 for vent terminals with respect to the openings found in building exterior walls.

Appendix D Recommended Procedure for Safety Inspection of an Existing Appliance Installation. This appendix is informative and not part of the code. It provides recommended procedures for testing and inspecting an appliance installation to determine if the installation is operating safely and if the appliance is in a safe condition.

Appendix E Manufactured Housing Used as Dwellings. The criteria for the construction of manufactured homes are governed by the National Manufactured Housing Construction and Safety Act. While this act may seem to cover the bulk of the construction of manufactured housing, it does not cover those areas related to the placement of the housing on the property. The provisions of Appendix E are not applicable to the design and construction of manufactured homes. Appendix E provides a complete set of regulations in conjunction with federal law for the installation of manufactured housing. This appendix also contains provisions for existing manufactured home installations.

Appendix F Radon Gas Methods. Radon comes from the natural (radioactive) decay of the element radium in soil, rock and water and finds its way into the air. Appendix F contains requirements to mitigate the transfer of radon gases from the soil into the dwelling. The provisions of this appendix regulate the design and construction of radon-resistant measures intended to reduce the entry of radon gases into the living space of residential buildings.

Appendix G Piping Standards for Various Applications. Appendix G provides standards for various types of plastic piping products. This appendix is informative and is not part of the code.

Appendix H Patio Covers. Appendix H sets forth the regulations and limitations for patio covers. The provisions address those uses permitted in patio cover structures, the minimum design loads to be assigned for structural purposes, and the effect of the patio cover on egress and emergency escape or rescue from sleeping rooms. This appendix also contains the special provisions for aluminum screen enclosures in hurricane-prone regions.

Appendix I Private Sewage Disposal. Appendix I simply provides the opportunity to utilize the International Private Sewage Disposal Code for the design and installation of private sewage disposal in one- and two-family dwellings.

Appendix J Existing Buildings and Structures. Appendix J contains the provisions for the repair, renovation, alteration and reconstruction of existing buildings and structures that are within the scope of this code. To accomplish this objective and to make the rehabilitation process more available, this appendix allows for a controlled departure from full code compliance without compromising minimum life safety, fire safety, structural and environmental features of the rehabilitated existing building or structure.

Appendix K Sound Transmission. Appendix K regulates the sound transmission of wall and floor-ceiling assemblies separating dwelling units and townhouse units. Airborne sound insulation is required for walls. Airborne sound insulation and impact sound insulation are required for floorceiling assemblies. The provisions in Appendix K set forth a minimum Sound Transmission Class (STC) rating for common walls and floor-ceiling assemblies between dwelling units. In addition, a

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minimum Impact Insulation Class (IIC) rating is also established to limit structureborne sound through common floor-ceiling assemblies separating dwelling units.

Appendix L Permit Fees. Appendix L provides guidance to jurisdictions for setting appropriate permit fees. This appendix will aid many jurisdictions to assess permit fees that will assist to fairly and properly administer the code. This appendix can be used for informational purposes only or may be adopted when specifically referenced in the adopting ordinance.

Appendix M Home Day Care—R-3 Occupancy. Appendix M provides means of egress and smoke detection requirements for a Group R-3 Occupancy that is to be used as a home day care for more than five children who receive custodial care for less than 24 hours. This appendix is strictly for guidance and/or adoption by those jurisdictions that have Licensed Home Care Provider laws and statutes that allow more than five children to be cared for in a person’s home. When a jurisdiction adopts this appendix, the provisions for day care and child care facilities in the IBC should be considered also.

Appendix N Venting Methods. Because venting of sanitary drainage systems is a difficult concept to understand, and Chapter 31 uses only words to describe venting requirements, illustrations can offer greater insight into what the words mean. Appendix N has a number of illustrations for commonly installed sanitary drainage systems in order for the reader to gain a better understanding of this code’s venting requirements.

s.** Because venting of sanitary drainage systems is a difficult concept to understand, and Chapter 31 uses only words to describe venting requirements, illustrations can offer greater insight into what the words mean. Appendix N has a number of illustrations for commonly installed sanitary drainage systems in order for the reader to gain a better understanding of this code’s venting requirements.

Appendix O Automatic Vehicular Gates. Appendix O provides the requirements for the design and construction of automatic vehicular gates. The provisions are for where automatic gates are installed for use at a vehicular entrance or exit on the lot of a one- or two-family dwelling. The requirements provide protection for individuals from potential entrapment between an automatic gate and a stationary object or surface.

Appendix P Sizing of Water Piping System. Appendix P provides two recognized methods for sizing the water service and water distribution piping for a building. The method under Section AP103 provides friction loss diagrams that require the user to “plot” points and read values from the diagrams in order to perform the required calculations and necessary checks. This method is the most accurate of the two presented in this appendix. The method under Section AP201 is known to be conservative; however, very few calculations are necessary in order to determine a pipe size that satisfies the flow requirements of any application.

Appendix Q Tiny Houses. For dwelling units that are 400 square feet (37 m ² ) or less in floor area, excluding lofts, Appendix Q provides relaxed provisions as compared to those in the body of the code. These provisions primarily address reduced ceiling heights for loft areas and specific stair and ladder detail requirements that allow for more compact designs where accessing lofts.

Appendix R Light Straw-Clay Construction. This appendix regulates the use of light strawclay as a construction material. It is limited in application to nonbearing wall infill systems.

Appendix S Strawbale Construction. This appendix provides prescriptive requirements for the use of strawbale as a construction material. It is limited in application to the walls of one-story structures, except where additional engineering is provided.

Appendix T Solar-ready Provisions—Detached One- and Two-family Dwellings and Townhouses. This appendix provides requirements for preparation of a house for future installation of solar equipment for electrical power or heating. Given the growing popularity of solar power and the possible need for the equipment in the future, this appendix, if adopted, would require an area be provided on the building roof that would accommodate solar equipment. In addition, pathways for routing of plumbing and conduit need to be provided.

r preparation of a house for future installation of solar equipment for electrical power or heating. Given the growing popularity of solar power and the possible need for the equipment in the future, this appendix, if adopted, would require an area be provided on the building roof that would accommodate solar equipment. In addition, pathways for routing of plumbing and conduit need to be provided.

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xx 2019 CALIFORNIA RESIDENTIAL CODE Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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Table of Contents¶

TABLE OF CONTENTS

R107	Temporary Structures and Uses. . . . . . . . . . . . . . 22
R108	Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
R109	Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
R110	Certificate of Occupancy . . . . . . . . . . . . . . . . . . . 24
R111	Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . 25
R112	Board of Appeals . . . . . . . . . . . . . . . . . . . . . . . . . 25
R113	Violations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
R114	Stop Work Order . . . . . . . . . . . . . . . . . . . . . . . . . 25

Part II—Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

CHAPT	ER 2 DEFINITIONS . . . . . . . . . . . . . . . . . . . . 31
Section
R201	General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
R202	Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Part I—Administrative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CHAPTER 1 SCOPE AND	CHAPTER 1 SCOPE AND
	APPLICATION. . . . . . . . . . . . . . . . . . . . . 3
*DIVISION I—CALIFORNIA*	*DIVISION I—CALIFORNIA*
Section	*ADMINISTRATION . . . . . . . . . . . . . . . . . 3*
1.1	General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.6	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.7	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.8	Department of Housing and Community
	Development (HCD) . . . . . . . . . . . . . . . . . . . . . 5
1.8.2	Authority and Abbreviations . . . . . . . . . . . . . . . . . 5
1.8.3	Local Enforcing Agency. . . . . . . . . . . . . . . . . . . . . 7
1.8.4	Permits, Fees, Applications and Inspections . . . . . 7
1.8.5	Right of Entry for Enforcement . . . . . . . . . . . . . . . 8
1.8.6	Local Modification by Ordinance or Regulation . . . 8
1.8.7	Alternate Materials, Designs, Tests and
	Methods of Construction . . . . . . . . . . . . . . . . . . 9
1.8.8	Appeals Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.8.9	Unsafe Buildings or Structures. . . . . . . . . . . . . . . 10
1.8.10	Other Building Regulations . . . . . . . . . . . . . . . . . 11
1.9	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.10	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.11	Office of the State Fire Marshal . . . . . . . . . . . . . . 11
1.12	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.13	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.14	Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
*DIVISION II—ADMINISTRATION . . . . . . . . . . . . . . . . 17*
Section
R101	General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
R102	Applicability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
R103	Department of Building Safety. . . . . . . . . . . . . . . 18
R104	Duties and Powers of the Building Official . . . . . 18
R105	Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
R106	Construction Documents . . . . . . . . . . . . . . . . . . . 21

Part III—Building Planning and Construction. . . . . . . . 47
CHAPTER 3 BUILDING PLANNING . . . . . . . . . . . . 47
Section
R300	Site Drainage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
R301	Design Criteria. . . . . . . . . . . . . . . . . . . . . . . . . . . 47
R302	Fire-resistant Construction. . . . . . . . . . . . . . . . . . 76
R303	Light, Ventilation and Heating. . . . . . . . . . . . . . . 82
R304	Minimum Room Areas. . . . . . . . . . . . . . . . . . . . . 83
R305	Ceiling Height . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
R306	Sanitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
R307	Toilet, Bath and Shower Spaces . . . . . . . . . . . . . 84
R308	Glazing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
R309	Garages and Carports. . . . . . . . . . . . . . . . . . . . . . 87
R310	Emergency Escape and Rescue Openings . . . . . . 88
R311	Means of Egress. . . . . . . . . . . . . . . . . . . . . . . . . . 90
R312	Guards and Window Fall Protection . . . . . . . . . . 93
R313	Automatic Fire Sprinkler Systems. . . . . . . . . . . . 94
R314	Smoke Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . 107
R315	Carbon Monoxide Alarms . . . . . . . . . . . . . . . . . 111
R316	Foam Plastic. . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
R317	Protection of Wood and Wood-based
	Products against Decay . . . . . . . . . . . . . . . . . 115
R318	Protection against Subterranean Termites . . . . . 116
R319	Site Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
R320	Accessibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

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R321 Elevators and Platform Lifts. . . . . . . . . . . . . . . . 117

R322 Flood-resistant Construction . . . . . . . . . . . . . . . 117

R323 Storm Shelters . . . . . . . . . . . . . . . . . . . . . . . . . . 121

R324 Solar Energy Systems. . . . . . . . . . . . . . . . . . . . . 121

R325 Mezzanines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

R326 Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

R327 Stationary Storage Battery Systems . . . . . . . . . . 123

R334 Construction Waste Reduction,

Disposal and Recycling . . . . . . . . . . . . . . . . . 123

R335 Special Provisions for Licensed 24-hour

Care Facilities in a Group R-3.1. . . . . . . . . . . 123

R336 Large Family Day-care Homes . . . . . . . . . . . . . 127

R337 Materials and Construction Methods for

Exterior Wildfire Exposure . . . . . . . . . . . . . . 128

R337.1 Scope, Purpose and Application. . . . . . . . . . . . . 128

R337.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

R337.3 Standards of Quality. . . . . . . . . . . . . . . . . . . . . . 130

R337.4 Ignition-resistant Construction. . . . . . . . . . . . . . 131

R337.5 Roofing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

R337.6 Vents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

R337.7 Exterior Covering. . . . . . . . . . . . . . . . . . . . . . . . 132

R337.8 Exterior Windows, Skylights and Doors . . . . . . 135

R337.9 Decking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

R337.10 Accessory Structures . . . . . . . . . . . . . . . . . . . . . 136

R338 Electric Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 137

R340 Pollutant Control . . . . . . . . . . . . . . . . . . . . . . . . 137

R504	Pressure Preservative-treated Wood
	Floors (On Ground) . . . . . . . . . . . . . . . . . . . . 199
R505	Cold-formed Steel Floor Framing . . . . . . . . . . . 200
R506	Concrete Floors (On Ground) . . . . . . . . . . . . . . 211
R507	Exterior Decks . . . . . . . . . . . . . . . . . . . . . . . . . . 216
CHAPTER 6 WALL CONSTRUCTION . . . . . . . . . 229
Section
R601	General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
R602	Wood Wall Framing. . . . . . . . . . . . . . . . . . . . . . 229
R603	Cold-formed Steel Wall Framing. . . . . . . . . . . . 277
R604	Wood Structural Panels . . . . . . . . . . . . . . . . . . . 318
R605	Particleboard . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
R606	General Masonry Construction . . . . . . . . . . . . . 318
R607	Glass Unit Masonry . . . . . . . . . . . . . . . . . . . . . . 330
R608	Exterior Concrete Wall Construction. . . . . . . . . 332
R609	Exterior Windows and Doors. . . . . . . . . . . . . . . 403
R610	Structural Insulated Panel Wall
	Construction. . . . . . . . . . . . . . . . . . . . . . . . . . 406
CHAPTER 7 WALL COVERING. . . . . . . . . . . . . . . 417
Section
R701	General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
R702	Interior Covering . . . . . . . . . . . . . . . . . . . . . . . . 417
R703	Exterior Covering. . . . . . . . . . . . . . . . . . . . . . . . 422
CHAPTER 8 ROOF-CEILING	CHAPTER 8 ROOF-CEILING
Section	CONSTRUCTION . . . . . . . . . . . . . . . . 443
R801	General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443
R802	Wood Roof Framing . . . . . . . . . . . . . . . . . . . . . 443
R803	Roof Sheathing. . . . . . . . . . . . . . . . . . . . . . . . . . 469
R804	Cold-formed Steel Roof Framing . . . . . . . . . . . 472
R805	Ceiling Finishes . . . . . . . . . . . . . . . . . . . . . . . . . 487
R806	Roof Ventilation. . . . . . . . . . . . . . . . . . . . . . . . . 487
R807	Attic Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489
CHAPTER 9 ROOF ASSEMBLIES . . . . . . . . . . . . . 493
Section
R901	General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 493
R902	Fire Classification . . . . . . . . . . . . . . . . . . . . . . . 493
R903	Weather Protection. . . . . . . . . . . . . . . . . . . . . . . 494
R904	Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494
R905	Requirements for Roof Coverings . . . . . . . . . . . 494

CHAPT	ER 4 FOUNDATIONS. . . . . . . . . . . . . . . . . . 141
Section
R401	General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
R402	Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
R403	Footings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
R404	Foundation and Retaining Walls . . . . . . . . . . . . 163
R405	Foundation Drainage . . . . . . . . . . . . . . . . . . . . . 182
R406	Foundation Waterproofing and
	Dampproofing. . . . . . . . . . . . . . . . . . . . . . . . . 184
R407	Columns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
R408	Under-floor Space . . . . . . . . . . . . . . . . . . . . . . . 185
CHAPTER 5 FLOORS . . . . . . . . . . . . . . . . . . . . . . . . 189
Section
R501	General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
R502	Wood Floor Framing . . . . . . . . . . . . . . . . . . . . . 189
R503	Floor Sheathing . . . . . . . . . . . . . . . . . . . . . . . . . 198

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R906	Roof Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . 506
R907	Rooftop-mounted
	Photovoltaic Panel Systems . . . . . . . . . . . . . . 506
R908	Reroofing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506
R918	Solar Photovoltaic Panels/Modules . . . . . . . . . . 507

CHAPTER 10 CHIMNEYS AND FIREPLACES . . . 511

Section

R1001 Masonry Fireplaces . . . . . . . . . . . . . . . . . . . . . . 511

R1002 Masonry Heaters. . . . . . . . . . . . . . . . . . . . . . . . . 515

R1003 Masonry Chimneys. . . . . . . . . . . . . . . . . . . . . . . 515

R1004 Factory-built Fireplaces . . . . . . . . . . . . . . . . . . . 519

R1005 Factory-built Chimneys . . . . . . . . . . . . . . . . . . . 520

R1006 Exterior Air Supply . . . . . . . . . . . . . . . . . . . . . . 521

Part IV—Energy Conservation . . . . . . . . . . . . . . . . . . . . 523

Part V—Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525

Part VI—Fuel Gas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527

Part VII—Plumbing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 529

Part VIII—Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . 531

Part IX—Referenced Standards . . . . . . . . . . . . . . . . . . . 535

CHAPTER 44 REFERENCED STANDARDS . . . . . 535

APPENDIX A Reserved . . . . . . . . . . . . . . . . . . . . . . . . 555

APPENDIX B Reserved . . . . . . . . . . . . . . . . . . . . . . . . 557

APPENDIX C Reserved . . . . . . . . . . . . . . . . . . . . . . . . 559

APPENDIX D Reserved . . . . . . . . . . . . . . . . . . . . . . . . 561

APPENDIX E Reserved . . . . . . . . . . . . . . . . . . . . . . . . 563

APPENDIX F RADON CONTROL METHODS . . . 565

Section

AF101 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 565

AF102 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 565

AF103 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 566

APPENDIX G Reserved . . . . . . . . . . . . . . . . . . . . . . . . 573

TABLE OF CONTENTS

APPEN	DIX H PATIO COVERS . . . . . . . . . . . . . . . . 575
Section
AH101	General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575
AH102	Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575
AH103	Exterior Walls and Openings. . . . . . . . . . . . . . . 575
AH104	Height. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575
AH105	Structural Provisions . . . . . . . . . . . . . . . . . . . . . 576
AH106	Special Provisions for Aluminum Screen
	Enclosures in Hurricane-prone Regions . . . . 576
APPENDIX I PRIVATE SEWAGE DISPOSAL. . . 579
Section
AI101	General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 579
APPENDIX J EXISTING BUILDINGS
Section	AND STRUCTURES . . . . . . . . . . . . . 581
AJ101	Purpose and Intent . . . . . . . . . . . . . . . . . . . . . . . 581
AJ102	Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 581
AJ103	Preliminary Meeting . . . . . . . . . . . . . . . . . . . . . 582
AJ104	Evaluation of an Existing Building . . . . . . . . . . 582
AJ105	Permit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 583
AJ201	Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 583
AJ301	Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 583
AJ401	Renovations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 584
AJ501	Alterations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 584
AJ601	Reconstruction . . . . . . . . . . . . . . . . . . . . . . . . . . 585
AJ701	Referenced Standards. . . . . . . . . . . . . . . . . . . . . 585
APPENDIX K SOUND TRANSMISSION . . . . . . . . 587
Section
AK101	General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 587
AK102	Airborne Sound . . . . . . . . . . . . . . . . . . . . . . . . . 587
AK103	Structural-borne Sound . . . . . . . . . . . . . . . . . . . 587
AK104	Referenced Standards. . . . . . . . . . . . . . . . . . . . . 587
APPENDIX L PERMIT FEES . . . . . . . . . . . . . . . . . . 589
APPENDIX M Reserved . . . . . . . . . . . . . . . . . . . . . . . . 591
APPENDIX N Reserved . . . . . . . . . . . . . . . . . . . . . . . . 593
APPENDIX O AUTOMATIC VEHICULAR	APPENDIX O AUTOMATIC VEHICULAR
Section	GATES. . . . . . . . . . . . . . . . . . . . . . . . . 595
AO101	General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 595

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AO102	Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .595	APPENDIX V	SWIMMING POOL
AO103	Automatic Vehicular Gates . . . . . . . . . . . . . . . . . . .595		*SAFETY ACT . . . . . . . . . . . . . . . . . . . 625*
AO104	Referenced Standards. . . . . . . . . . . . . . . . . . . . . . . .595	_APPENDIX W _	*AREAS PROTECTED BY*
APPENDIX P Reserved . . . . . . . . . . . . . . . . . . . . . . . . 597	APPENDIX P Reserved . . . . . . . . . . . . . . . . . . . . . . . . 597		*THE FACILITIES OF THE* *CENTRAL VALLEY FLOOD*
APPENDIX Q TINY HOUSES . . . . . . . . . . . . . . . . . . 599	APPENDIX Q TINY HOUSES . . . . . . . . . . . . . . . . . . 599		*PROTECTION PLAN . . . . . . . . . . . . . 629*
Section		*APPENDIX X*	*EMERGENCY HOUSING . . . . . . . . . 635*
AQ101	General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599	Section
AQ102	Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599	AX101 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 635	AX101 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 635
AQ103	Ceiling Height . . . . . . . . . . . . . . . . . . . . . . . . . . 599	AX102 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 635	AX102 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 635
AQ104	Lofts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599	AX103 Emergency Housing . . . . . . . . . . . . . . . . . . . . . . 636	AX103 Emergency Housing . . . . . . . . . . . . . . . . . . . . . . 636
AQ105	Emergency Escape and Rescue Openings . . . . . 600	AX104 Emergency Sleeping Cabins. . . . . . . . . . . . . . . . 636	AX104 Emergency Sleeping Cabins. . . . . . . . . . . . . . . . 636
		AX105 Emergency Transportable Housing Units . . . . . 637
APPENDIX R LIGHT STRAW-CLAY	APPENDIX R LIGHT STRAW-CLAY	AX106 Tents and Membrane Structures . . . . . . . . . . . . 637	AX106 Tents and Membrane Structures . . . . . . . . . . . . 637
	CONSTRUCTION . . . . . . . . . . . . . . . 601	AX107 Accessibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 637	AX107 Accessibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 637
Section		AX108 Lofts in Emergency Housing . . . . . . . . . . . . . . . 637	AX108 Lofts in Emergency Housing . . . . . . . . . . . . . . . 637
AR101	General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601	AX109 Location, Maintenance and Identification. . . . . 638	AX109 Location, Maintenance and Identification. . . . . 638
AR102	Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601	AX110 Emergency Housing Facilities. . . . . . . . . . . . . . 638	AX110 Emergency Housing Facilities. . . . . . . . . . . . . . 638
AR103	Nonbearing Light Straw-
	Clay Construction. . . . . . . . . . . . . . . . . . . . . . 601	INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 641	INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 641
AR104	Thermal Performance. . . . . . . . . . . . . . . . . . . . . 604
APPENDIX S STRAWBALE	APPENDIX S STRAWBALE	HISTORY NOTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 651	HISTORY NOTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 651
Section	CONSTRUCTION . . . . . . . . . . . . . . . 605
AS101	General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605
AS102	Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605
AS103	Bales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 607
AS104	Finishes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 608
AS105	Strawbale Walls—General. . . . . . . . . . . . . . . . . 612
AS106	Strawbale Walls—Structural . . . . . . . . . . . . . . . 614
AS107	Fire Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . 619
AS108	Thermal Insulation . . . . . . . . . . . . . . . . . . . . . . . 619
AS109	Referenced Standards. . . . . . . . . . . . . . . . . . . . . 619
APPENDIX T SOLAR-READY PROVISIONS—
	DETACHED ONE- AND
	TWO-FAMILY DWELLINGS AND
Section	TOWNHOUSES . . . . . . . . . . . . . . . . . 621
T101	Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 621
T102	General Definition . . . . . . . . . . . . . . . . . . . . . . . 621
T103	Solar-ready Zone . . . . . . . . . . . . . . . . . . . . . . . . 621

APPENDIX U Reserved . . . . . . . . . . . . . . . . . . . . . . . . 623

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