CEBC · California Existing Building Code
Where is the official list of referenced standards located?
Chapter 16 of the California Existing Building Code is the authoritative list of all referenced standards (each listed by agency, edition and the CEBC sections that cite it); those standards are enforceable to the extent the CEBC references them and application/precedence rules are in §102.4.
Last reviewed: July 6, 2026
What the code requires — plain English
The official list of all referenced standards for the California Existing Building Code is published in Chapter 16 — cited here as § 16 — of the 2025 CEBC. Chapter 16 contains each referenced standard listed by promulgating agency, standard identification, effective date/title, and the section(s) of the CEBC that cite it. Compliance with a referenced standard is required to the extent that the CEBC references it; the relationship between the code and referenced standards is governed by § 102.4.
The single most important point: the authoritative, enforceable list of external standards used by the CEBC is Chapter 16 (see § 16); the listed standards become part of the code to the extent each is referenced (see § 102.4).
Requirements in detail
What Chapter 16 contains (what to look for)
- The official list is organized by promulgator (agency or organization), standard identification (number/edition), effective date and title, and the CEBC section(s) that reference the standard.
- Chapter 16 covers standards referenced in Chapters 1–15 and the CEBC appendices; some appendices also include their own referenced‑standards tables.
How the listed standards are applied
- Referenced standards listed in § 16 are treated as part of the CEBC “to the prescribed extent of each such reference.” The precedence and application rules are set out in § 102.4 (including conflict resolution, scope limits, and replacement of referenced code text where California amendments apply).
Which agencies adopt which parts
- The CEBC includes a matrix adoption table that shows whether a state agency adopts the entire Chapter 16, the chapter with amendments, or selected sections only. Consult the matrix in the CEBC to see agency‑specific adoption.
Quick decision table
| Decision question | Where to find the answer in the CEBC | Code Reference |
|---|---|---|
| Where is the official list of all referenced standards? | Chapter 16 — the Referenced Standards chapter lists standards by agency, number/edition, title and citing sections. | § 16 |
| Do those standards become enforceable? | Yes — referenced standards are part of the code "to the prescribed extent of each such reference." | § 102.4 |
| Do appendices have their own lists? | Yes — many appendices include their own "Referenced Standards" section/tables (example: Appendix B, C, E, A). | § B104.1, § C301.1, § E108.1, § A501.1 |
| Which edition/date of a standard is enforceable? | The edition/effective date shown in Chapter 16 is the edition that the CEBC references and enforces — always check the edition in Chapter 16. | § 16 |
Practical rules you must follow (short list)
- Always check Chapter 16 for the exact edition/date of the referenced standard before assuming compliance.
- If a referenced standard conflicts with a CEBC provision, the CEBC governs per § 102.4.1–.2.
- For appendix‑specific work, always check the appendix table (e.g., § B104.1, § C301.1, § E108.1, § A501.1) because appendices may list additional or different standards.
Exceptions & special cases
- Some state agencies do not adopt the entire Chapter 16 (see the CEBC adoption matrix). That means a standard listed in Chapter 16 may not be adopted for certain agency jurisdictions — always consult the matrix for agency adoption status.
- Appendices often include their own referenced‑standards lists. When work falls under an appendix, its appendix table is authoritative for the appendix provisions. Examples: Appendix B (B104.1), Appendix C (C301.1), Appendix E (E108.1) and Appendix A (A501.1).
- Where the CEBC refers to another code’s standards (for example, ASCE, NFPA), the CEBC may specify substitution or California‑specific modifications; consult § 102.4.3–.4 for replacement rules.
Common mistakes
- Assuming any newer edition of a standard applies — the enforceable edition is the one listed in Chapter 16 (not necessarily the current edition published by the standards body). Always read the edition/date in § 16.
- Failing to check the adoption matrix — a standard in Chapter 16 might not be adopted by a particular state agency for its regulated facilities. Check the matrix entries in the CEBC.
- Treating a referenced standard as optional guidance — Chapter 16 makes the standard part of the code “to the prescribed extent of each such reference”; it is enforceable where the CEBC cites it.
Worked example — concrete scenario
Scenario: a building permit reviewer must verify which edition of NFPA 72 applies to an alarm alteration called out in CEBC section X (for example, any CEBC section that cites NFPA 72).
Step 1 — Look up NFPA 72 in Chapter 16 (the Referenced Standards list) to find the exact edition and the CEBC section(s) that reference it. Chapter 16 lists the standard by promulgator, edition and the CEBC sections that use it.
Step 2 — Confirm whether the NFPA 72 edition in § 16 is the 2024 edition (example found in the CEBC list as NFPA 72—24). If Chapter 16 shows NFPA 72—24, the 2024 edition is the one referenced by the CEBC and must be used for code compliance.
Step 3 — Apply § 102.4 rules: if any provision in NFPA 72 conflicts with a CEBC provision, the CEBC provision controls (per § 102.4.1–.2). For cross‑references to other codes or to International Code text inside a referenced standard, confirm whether § 102.4.3–.4 requires substitution with California‑specific provisions.
Numbers example (concrete): If Chapter 16 shows "NFPA 72—24" and the CEBC section that calls NFPA 72 is Section 1501.2 (hypothetical), the reviewer enforces NFPA 72 (2024) as cited in § 16 for work performed under that CEBC section, subject to § 102.4 precedence rules. (Always verify the exact CEBC section number where NFPA 72 is invoked by checking the Chapter 16 listing.)
Related provisions
- § 16 — Chapter 16, Referenced Standards (official list and format).
- § 102.4 — Referenced codes and standards; how referenced standards become part of the code and conflict rules.
- § B104.1 — Appendix B referenced standards table (appendix‑level list).
- § C301.1 — Appendix C referenced standards table (appendix‑level list).
- § E108.1 — Appendix E referenced standards table (appendix‑level list).
- § A501.1 — Appendix A referenced standards table (appendix‑level list).
Code references
Grounded in the retrieved California Existing Building Code — click a citation to read the verbatim passage:
CEBC § 3.1. High relevance — show source text
Defects in the system or leaks detected shall be documented and repaired. 2. A cylinder-filling performance test shall be conducted to verify compliance with the required breathing air cylinder refill rate from the exterior mobile air connection and, where provided, a stored air pressure supply system. 3. The air quality monitoring system shall be tested to verify both of the following conditions: 3.1. Visual indicators required by Section L104.15.1 function properly. 3.2. Supervisory signals are transmitted as required by Section L104.15.2 for each sensor based on a sensor function test. 4. Connections intended for fire department use shall be confirmed as compatible with the fire department’s mobile air unit, SCBA cylinders and, where provided, RIC/UAC connections. 5. Air samples shall be taken from not less than two fill stations and submitted to an approved gas analysis laboratory to verify compliance with NFPA 1989. The FARS shall not be placed into service until a written report verifying compliance with NFPA 1989 has been provided to the fire code official.
SECTION L106—INSPECTION, TESTING AND MAINTENANCE
L106.1 Periodic inspection, testing and maintenance. A FARS shall be continuously maintained in an operative condition and shall be inspected not less than annually. Not less than quarterly, an air sample shall be taken from the system and tested to verify compliance with NFPA 1989. The laboratory test results shall be maintained on site and readily available for review by the fire code official.
SECTION L107—REFERENCED STANDARDS
L107.1 General. See Table L107.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.
TABLE L107.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED ASME B31.3—2022 Process Piping L104.2.1, L105.1 CGA S-1.3—2020 Pressure Relief Device Standards—Part 3
Stationary Storage Containers for Compressed GasesL104.7 NFPA 1901—16 Standard for Automotive Fire Apparatus L104.5.1 NFPA 1989—13 Breathing Air Quality for Fire Emergency Services Respiratory Protection L104.2.2, L105.1, L106.1 2025 CALIFORNIA FIRE CODE APPENDIX L-5
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APPENDIX L-6 2025 CALIFORNIA FIRE CODE
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CALIFORNIA FIRE CODE – MATRIX ADOPTION TABLE
APPENDIX M – HIGH-RISE BUILDINGS—RETROACTIVE AUTOMATIC SPRINKLER REQUIREMENT
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
(Not adopted by the State Fire Marshal)
CEBC § 1.1.11. High relevance — show source text
Chapter 10 Change of Occupancy.
The purpose of Chapter 10 is to address existing buildings that are subject to a change of occupancy. This chapter is an assembly of requirements to upgrade safety without having to comply fully as a new building. A change of occupancy classification is considered a change of occupancy, however, it will involve a higher level of regulation since the use of the building has made a more significant change.
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Chapter 11 Additions.
Chapter 11 provides the requirements for additions, which are considered new construction. The requirements focus on safely integrating the addition with the existing building. This includes issues such as limiting the overall height and area of the building where the addition is not separated by a fire wall.
Chapter 12 Historic Buildings —Reserved
Chapter 12 is not adopted by the State of California. Historic buildings and structures shall comply with Part 8, Title 24, California Code of Regulations.
Chapter 13 Performance Compliance Methods.
Chapter 13 allows for existing buildings to be evaluated to show that alterations or a change of occupancy, while not meeting new construction requirements, will provide a level of safety to demonstrate compliance. Provisions are based on a numerical scoring system involving 21 safety parameters where, when evaluated, such buildings must meet a minimum overall safety score.
Chapter 13 is not adopted by the State of California but may be available for adoption by local ordinance, see Section 1.1.11. See Section 104.11 for consideration of alternative means of compliance.
Chapter 14 Relocated or Moved Buildings.
Chapter 14 is applicable to any building that is moved or relocated. This chapter is independent of any of the three compliance methods and focuses on the structural loads where the building is being relocated.
Chapter 15 Construction Safeguards.
Chapter 15 establishes specific regulations in order to minimize the risk to the public and adjacent property during construction. Additionally, this chapter addresses fire and life safety and means of egress during the construction process. This includes requirements for a site safety plan. This chapter is also consistent with Chapter 33 of the CBC and Chapter 33 of the California Fire Code (CFC).
Chapter 16 Referenced Standards.
Chapter 16 lists all of the product and installation standards and codes that are referenced throughout Chapters 1 through 15 and includes identification of the promulgators and the section numbers in which the standards and codes are referenced. As stated in Section 102.4, these standards and codes become an enforceable part of the code (to the prescribed extent of the reference) as if printed in the body of the code.
Appendix A Guidelines for the Seismic Retrofit of Existing Buildings.
Appendix A provides guidelines for upgrading the seismic resistance capacity of different types of existing buildings. It is organized into separate chapters which deal with buildings of different types, including unreinforced masonry buildings, reinforced concrete and reinforced masonry wall buildings, and lightframe wood buildings. This appendix includes its own referenced standards.
Appendix B Supplementary Accessibility Requirements for Existing Buildings and Facilities.
Chapters 11A and 11B of the CBC contain provisions that set forth requirements for accessibility to buildings and their associated sites and facilities for people with physical disabilities. Appendix B was added to address accessibility in construction for items that are not typically enforceable through the traditional building code enforcement process.
Appendix C Guidelines for the Wind Retrofit of Existing Buildings.
CEBC § 102.4 High relevance — show source text
Chapter 14 is applicable to any building that is moved or relocated. This chapter is independent of any of the three compliance methods and focuses on the structural loads where the building is being relocated.
Chapter 15 Construction Safeguards.
Chapter 15 establishes specific regulations in order to minimize the risk to the public and adjacent property during construction. Additionally, this chapter addresses fire and life safety and means of egress during the construction process. This includes requirements for a site safety plan. This chapter is also consistent with Chapter 33 of the CBC and Chapter 33 of the California Fire Code (CFC).
Chapter 16 Referenced Standards.
Chapter 16 lists all of the product and installation standards and codes that are referenced throughout Chapters 1 through 15 and includes identification of the promulgators and the section numbers in which the standards and codes are referenced. As stated in Section 102.4, these standards and codes become an enforceable part of the code (to the prescribed extent of the reference) as if printed in the body of the code.
Appendix A Guidelines for the Seismic Retrofit of Existing Buildings.
Appendix A provides guidelines for upgrading the seismic resistance capacity of different types of existing buildings. It is organized into separate chapters which deal with buildings of different types, including unreinforced masonry buildings, reinforced concrete and reinforced masonry wall buildings, and lightframe wood buildings. This appendix includes its own referenced standards.
Appendix B Supplementary Accessibility Requirements for Existing Buildings and Facilities.
Chapters 11A and 11B of the CBC contain provisions that set forth requirements for accessibility to buildings and their associated sites and facilities for people with physical disabilities. Appendix B was added to address accessibility in construction for items that are not typically enforceable through the traditional building code enforcement process.
Appendix C Guidelines for the Wind Retrofit of Existing Buildings.
The purpose of Appendix C is to provide voluntary prescriptive alternatives for addressing the retrofit of buildings in high-wind areas. Currently, there are two chapters which deal with the retrofit of gable ends and the fastening of roof decks, Appendix Chapters C1 and C2, respectively. This appendix includes its own referenced standards.
Appendix D Board of Appeals.
Appendix D contains the provisions for appeal and the establishment of a board of appeals. The provisions include the application for an appeal, the makeup of the board of appeals and the conduct of the appeal process.
Appendix E Temporary Emergency Uses.
Appendix E is intended to provide guidance for designers, engineers, architects and fire and building officials on allowing temporary emergency uses of existing buildings with respect to the minimum code requirements. This appendix is a template or checklist that references the relevant code requirement of concerns.
Resource A Guidelines on Fire Ratings of Archaic Materials and Assemblies.
In the process of repair and alteration of existing buildings, based on the nature and the extent of the work, the CEBC might require certain upgrades in the fire-resistance rating of building elements, at which time it becomes critical for the designers and the code
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officials to be able to determine the fire-resistance rating of the existing building elements as part of the overall evaluation for the assessment of the need for improvements. These guidelines are based upon the Guideline on Fire Ratings of Archaic Materials published by the National Institute of Building Sciences (NIBS).
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CEBC § 1.11. High relevance — show source text
41—2023|X|||X|X|||X|X|X|X|X||X|X|||||||||| |ASTM A615—15 22||||||||||X||||||||||||||| |ICC A117.1—2017||||†|†|†||||||||||||||||||| |ICC CBC—25||||||||||X||||||||||||||| |NFPA 72—24|||X||||||||||||||||||||||
The state agency does not adopt sections identified with the following symbol: 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.
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16 REFERENCED STANDARDS
User notes:
About this chapter: This code contains numerous references to standards that are used to regulate materials and methods of construction. Chapter 16 contains a comprehensive list of all standards that are referenced in the code, including the appendices. 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 building code official, contractor, designer and owner.
This chapter lists the standards that are referenced in various sections of this document. The standards are listed herein by the promulgating agency of the standard, the standard identification, the effective date and title, and the section or sections of this document that reference the standard. The application of the referenced standards shall be as specified in Section 102.4 , or California Administration Division 1, as applicable. [OSHPD 1] Reference to other chapters. In addition to the code sections referenced, the standards listed in this chapter are applicable to the respective code sections in Chapters 3A, 4A and 5A.
ACI American Concrete Institute, 38800 Country Club Drive, Farmington Hills, MI 48331-3439
562—21: Assessment, Repair, and Rehabilitation of Existing Concrete Structures—Code Requirements
405.1.1
ASCE/SEI American Society of Civil Engineers Structural Engineering Institute, 1801 Alexander Bell Drive, Reston, VA 20191-4400
7—1988: Minimum Design Loads and Associated Criteria for Buildings and Other Structures
503.12, 706.3.2
7—1993: Minimum Design Loads and Associated Criteria for Buildings and Other Structures
503.12, 706.3.2
7—1995: Minimum Design Loads and Associated Criteria for Buildings and Other Structures
503.12, 706.3.2
7—1998: Minimum Design Loads and Associated Criteria for Buildings and Other Structures
503.12, 706.3.2
7—2002: Minimum Design Loads and Associated Criteria for Buildings and Other Structures
503.12, 706.3.2
7—2005: Minimum Design Loads and Associated Criteria for Buildings and Other Structures
503.12, 706.3.2
7—2010: Minimum Design Loads and Associated Criteria for Buildings and Other Structures
CEBC § 1974-17 High relevance — show source text
E108-2020a|||X||||||||||||||||||||| |CSA||||X|||||||||||||||||||| |DASMA||||X|||||||||||||||||||| |ICC|||X|X|||||||||||||||||||| |IFC-18||||X|||||||||||||||||||| |ISO||||X|||||||||||||||||||| |NFPA|||X|X|||||||||||||||||||| |NFPA 68-13|||X||||||||||||||||||||| |SFM|||X||||||||||||||||||||| |UBC|||X||||||||||||||||||||| |UL||||X|||||||||||||||||||| |UL 790 Edition 9 2022|||X||||||||||||||||||||| |UL 1974-17|||X||||||||||||||||||||| |UL 9540-20|||X||||||||||||||||||||| |UL 9540 Edition 4 2019|||X||||||||||||||||||||| |WDMA||||X||||||||||||||||||||
The state agency does not adopt sections identified with the following symbol: †
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Part IX— Referenced Standards
44 REFERENCED STANDARDS
Notwithstanding California laws and regulations, these referenced standards shall be applicable only to those California Residential Code sections that are adopted.
User notes:
About this chapter: The one- and two-family dwelling code contains numerous references to standards promulgated by other organizations that are used to provide requirements for materials, products and methods of construction. Chapter 44 contains a comprehensive list of all standards that are referenced in this code. These standards, in essence, are part of this code to the extent of the reference to the standard.
This chapter lists the standards that are referenced in various sections of this document. The standards are listed herein by the promulgating agency of the standard, the standard identification, the effective date and title, and the section or sections of this document that reference the standard. The application of the referenced standards shall be as specified in Section R102.4.
ABTG Applied Building Technology Group LLC6300 Enterprise Lane Madison, WI 53719
ANSI/ABTG FS 100—2012 (R2018): Standard Requirements for Wind Pressure Resistance of Foam Plastic Insulation Sheathing Used in Exterior Wall Covering Assemblies
R303.8
ACCA Air Conditioning Contractors of America 1330 Braddock Place, Suite 350 Alexandria, VA 22314
ANSI/ACCA 2 Manual J—2016: Residential Load Calculation
Table R301.2
ACI American Concrete Institute 38800 Country Club Drive Farmington Hills, MI 48331
CEBC § 44-2 High relevance — show source text
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Part IX— Referenced Standards
44 REFERENCED STANDARDS
Notwithstanding California laws and regulations, these referenced standards shall be applicable only to those California Residential Code sections that are adopted.
User notes:
About this chapter: The one- and two-family dwelling code contains numerous references to standards promulgated by other organizations that are used to provide requirements for materials, products and methods of construction. Chapter 44 contains a comprehensive list of all standards that are referenced in this code. These standards, in essence, are part of this code to the extent of the reference to the standard.
This chapter lists the standards that are referenced in various sections of this document. The standards are listed herein by the promulgating agency of the standard, the standard identification, the effective date and title, and the section or sections of this document that reference the standard. The application of the referenced standards shall be as specified in Section R102.4.
ABTG Applied Building Technology Group LLC6300 Enterprise Lane Madison, WI 53719
ANSI/ABTG FS 100—2012 (R2018): Standard Requirements for Wind Pressure Resistance of Foam Plastic Insulation Sheathing Used in Exterior Wall Covering Assemblies
R303.8
ACCA Air Conditioning Contractors of America 1330 Braddock Place, Suite 350 Alexandria, VA 22314
ANSI/ACCA 2 Manual J—2016: Residential Load Calculation
Table R301.2
ACI American Concrete Institute 38800 Country Club Drive Farmington Hills, MI 48331
318—19: Building Code Requirements for Structural Concrete R402.2, R404.1.3, R404.1.3.1, Table R404.1.3.2(2), Table R404.1.3.2(5), Table R404.1.3.2(6), Table R404.1.3.2(7), Table R404.1.3.2(8), R404.1.3.3, R404.1.3.4, R404.1.4.2, R404.5.1, R608.1, R608.1.1, R608.1.2, R608.2, R608.5.1, R608.6.1, R608.8.2, R608.9.2, R608.9.3
332—20: Residential Code Requirements for Structural Concrete
R402.2, R403.1, R404.1.3, R404.1.3.4, R404.1.4.2, R506.1
AISI American Iron and Steel Institute 25 Massachusetts Avenue, NW Suite 800 Washington, DC 20001
AISI S100—16 (2020) w/S2—20: North American Specification for the Design of Cold-Formed Steel Structural Members, 2016 Edition (Reaffirmed 2020), with Supplement 2, 2020 Edition
R608.9.2, R608.9.3
AISI S220—20: North American Standard for Cold-Formed Steel Nonstructural Framing, 2020 Edition
R702.3.3
AISI S230—19: North American Standard for Cold-Formed Steel Framing—Prescriptive Method for One and Two Family Dwellings, 2019 Edition
CEBC § 102.4.2 High relevance — show source text
[A] 102.4.2 Provisions in referenced codes and standards. Where the extent of the reference to a referenced code or standard includes subject matter that is within the scope of this code or the California Codes specified in Section 101.4, the provisions of this code or the California Codes specified in Section 101.4, as applicable, shall take precedence over the provisions in the referenced code or standard.
102.4.3 Code references. [OSHPD 1, 1R, 2, 3, 4, 5 & 6, DSA-SS & DSA-SS/CC] All reference to International Codes or other similar codes in referenced standards shall be replaced by equivalent provisions in the California Building Standards Codes.
102.4.4 Reference in standards. [OSHPD 1, 1R, 2, 3, 4, 5 & 6, DSA-SS & DSA-SS/CC] All references listed in reference standards shall be replaced by referenced standards listed in Chapter 35 of this code, where applicable, and shall include all amendments to the reference standards in this code.
[A] 102.5 Partial invalidity. In the event that any part or provision of this code is held to be illegal or void, this shall not have the effect of making void or illegal any of the other parts or provisions.
[A] 102.6 Existing structures. The legal occupancy of any structure existing on the date of adoption of this code shall be permitted to continue without change, except as otherwise specifically provided in this code, the California Existing Building Code or the Cali- fornia Fire Code .
[A] 102.6.1 Buildings not previously occupied. A building or portion of a building that has not been previously occupied or used for its intended purpose in accordance with the laws in existence at the time of its completion shall comply with the provisions of this code or the California Residential Code, as applicable, for new construction or with any current permit for such occupancy.
[A] 102.6.2 Buildings previously occupied. The legal occupancy of any building existing on the date of adoption of this code shall be permitted to continue without change, except as otherwise specifically provided in this code, the California Fire Code or California Existing Building Code, or as is deemed necessary by the building official for the general safety and welfare of the occupants and the public.
PART 2—ADMINISTRATION AND ENFORCEMENT
SECTION 103—CODE COMPLIANCE AGENCY
[A] 103.1 Creation of enforcement agency. The [ INSERT NAME OF DEPARTMENT ] is hereby created and the official in charge thereof shall be known as the building official. The function of the agency shall be the implementation, administration and enforcement of the provisions of this code.
[A] 103.2 Appointment. The building official shall be appointed by the chief appointing authority of the jurisdiction.
[A] 103.3 Deputies. In accordance with the prescribed procedures of this jurisdiction and with the concurrence of the appointing authority, the building official shall have the authority to appoint a deputy building official, other related technical officers, inspectors and other employees. Such employees shall have powers as delegated by the building official.
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ADMINISTRATION
CEBC § 1512.5 Medium relevance — show source text
[F] 1512.5 Standpipe supply. Regardless of the presence of combustible building materials, the construction type or the fire separation distance, where a standpipe is required in accordance with Section 1509, a water supply providing a minimum flow of 500 gallons per minute (1893 L/m) shall be provided. The fire hydrant used for this water supply shall be located within 100 feet (30 480 mm) of the fire department connection supplying the standpipe.
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CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE
CHAPTER 16 – REFERENCED STANDARDS
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting Agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC Adopting Agency BSC BSC-
CGSFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6 Adopt Entire Chapter X X Adopt Entire Chapter as
amended (amended
sections listed below)X X X X X X X X X X X Adopt only those sections
that are listed belowChapter / Section ASCE/SEI 7—2016 X X X X X ASCE/SEI 7—2022 X X X X X X X ASCE/SEI 41—2013 X ASCE/SEI 41—2023 X X X X X X X X X X ASTM A615—15 22 X ICC A117. CEBC § 4.2 Medium relevance — show source text
SECTION B104—REFERENCED STANDARDS
[BE] B104.1 General. See Table B104.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.
[BS] TABLE B104.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED Y3.H626 2P National Historic Preservation J101.2, 43/933 Act of 1966
as amended J101.3, 3rd EditionB101.3, B101.4, B101.4.2 IBC—24 International Building Code B102.2.1, B103.1 36 CFR Part 1192 Americans with Disabilities Act Guidelines for
Transportation Vehicles—Rapid Rail Vehicles and SystemsB102.2.2 49 CFR Part 37 Subpart C Alteration of Transportation Facilities by
Public Entities Department of TransportationB102.2 APPENDIX B-4 2025 CALIFORNIA EXISTING BUILDING CODE
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CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE
APPENDIX C
CHAPTER C1 – GABLE END RETROFIT FOR HIGH-WIND AREAS
Not adopted by the State of California (May be available for adoption by local ordinance. See Section 1.1.11.)
Adopting Agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC Adopting Agency BSC BSC-
CGSFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6 Adopt Entire Chapter Adopt Entire Chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowChapter / Section The state agency does not adopt sections identified with the following symbol: † 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.
2025 CALIFORNIA EXISTING BUILDING CODE APPENDIX C-1
CEBC § 1.11. Medium relevance — show source text
Agency|BSC|BSC-
CG|SFM|1|2|1/AC|AC|SS|SS/CC|1|1R|2|3|4|5|6|6|6|6|6|6|6|6|6| |Adopt Entire Chapter|||||||||||||X|||X||||||||| |Adopt Entire Chapter as
amended (amended
sections listed below)|X||X|X|X|||X|X|X|X|X||X|X|||||||||| |Adopt only those sections
that are listed below||||||||||||||||||||||||| |Chapter / Section||||||||||||||||||||||||| |ASCE/SEI 7—2016||||||||||X|X|X||X|X|||||||||| |ASCE/SEI 7—2022||||||||X|X|X|X|X||X|X|||||||||| |ASCE/SEI 41—2013||||||||||X||||||||||||||| |ASCE/SEI 41—2023|X|||X|X|||X|X|X|X|X||X|X|||||||||| |ASTM A615—15 22||||||||||X||||||||||||||| |ICC A117.1—2017||||†|†|†||||||||||||||||||| |ICC CBC—25||||||||||X||||||||||||||| |NFPA 72—24|||X||||||||||||||||||||||The state agency does not adopt sections identified with the following symbol: 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.
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16 REFERENCED STANDARDS
User notes:
About this chapter: This code contains numerous references to standards that are used to regulate materials and methods of construction. Chapter 16 contains a comprehensive list of all standards that are referenced in the code, including the appendices. 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 building code official, contractor, designer and owner.
CEBC § 1.1.11. Medium relevance — show source text
APPENDIX C-30 2025 CALIFORNIA EXISTING BUILDING CODE
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APPENDIX C—GUIDELINES FOR THE WIND RETROFIT OF EXISTING BUILDINGS
CHAPTER C3
REFERENCED STANDARDS
SECTION C301—REFERENCED STANDARDS
[BS] C301.1 General. See Table C301.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.
[BS] TABLE C301.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED CBC—25 California Building Code C101.3, C103.2, C201.1, C201.2 CRC—25 California Residential Code C101.2, C101.3, C103.2, C201.2 2025 CALIFORNIA EXISTING BUILDING CODE APPENDIX C-31
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CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE
APPENDIX D
BOARD OF APPEALS
Not adopted by the State of California (May be available for adoption by local ordinance. See Section 1.1.11.)
Adopting Agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC Adopting Agency BSC BSC-
CGSFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6 Adopt Entire Chapter Adopt Entire Chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowChapter / Section The state agency does not adopt sections identified with the following symbol: 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.
CEBC § 1.11. Medium relevance — show source text
Adopting Agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC Adopting Agency BSC BSC-
CGSFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6 Adopt Entire Chapter Adopt Entire Chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowChapter / Section The state agency does not adopt sections identified with the following symbol: † 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.
2025 CALIFORNIA EXISTING BUILDING CODE APPENDIX C-29
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APPENDIX C-30 2025 CALIFORNIA EXISTING BUILDING CODE
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APPENDIX C—GUIDELINES FOR THE WIND RETROFIT OF EXISTING BUILDINGS
CHAPTER C3
REFERENCED STANDARDS
SECTION C301—REFERENCED STANDARDS
[BS] C301.1 General. See Table C301.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.
[BS] TABLE C301.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED CBC—25 California Building Code C101.3, C103.2, C201.1, C201.2 CRC—25 California Residential Code C101.2, C101.3, C103.2, C201.2 2025 CALIFORNIA EXISTING BUILDING CODE APPENDIX C-31
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APPENDIX C-32 2025 CALIFORNIA EXISTING BUILDING CODE
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CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE
CEBC § 1701.1 High relevance — show source text
Chapter 16 Nonpotable Rainwater Catchment Systems.
Chapter 16 regulates nonpotable rainwater catchment systems that include irrigation; toilet and urinal flushing with proper treatment; provisions where permits are required; maintenance of alternate water sources; and minimum water quality. This chapter provides guidance on how to optimize rainwater use while ensuring there is a decrease of risk to consumers from poor design, installation, and maintenance. Rainwater harvesting is the process of capturing, channeling, and storing water runoff for later use. Most systems are constructed of three principal components: the catchment area, the collection device, and the conveyance system.
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 approved standards, publications, practices, and guides that are not referenced in specific sections appear in Table 1701.2.
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 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 tables are 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 tables list the title of the standard, the edition, and any addenda. Contact information for each publishing agency is provided at the end of the chapter.
Appendix A Recommended Rules for Sizing the Water Supply System.
Appendix A provides a method of sizing the water supply and distribution system that provides precise calculations to establish the proper pressures and flow to the system’s fixtures. The goal of sizing the system is to deliver an acceptable volume of water to the most hydraulically remote fixture during minimum pressure and maximum flow conditions; provide satisfactory water pressure to the most hydraulically remote fixture during minimum pressure and maximum flow conditions; and to prevent excessive water velocity during maximum flow conditions.
Appendix B Explanatory Notes on Combination Waste and Vent Systems.
Appendix B contains general guidelines for the design and installation of combination waste and vent systems. These systems are designed for waste piping and are purposely oversized to serve as both a waste and vent pipe to avoid excessive pneumatic effects at fixture drains.
Appendix C Alternate Plumbing Systems.
The intent of this appendix is to provide clarification of procedures for the design and approval of engineered plumbing systems, alternate materials, and equipment that are not specifically covered in other parts of the code. Alternative methods are allowed to be used where approved by the authority having jurisdiction. Approval of alternatives is based on a demonstration showing that the method or material used is at least equivalent in strength, deflection, and capacity to that provided by the prescriptive methods and materials.
Appendix D Sizing Storm Water Drainage Systems.
Appendix D provides general guidelines for the sizing of stormwater drainage systems. There are two pieces of information that must always be a given. They are the roof size and the rate of rainfall f
CEBC § 1801.1 High relevance — show source text
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.
xvi 2025 CALIFORNIA MECHANICAL CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
FORMAT OF THE UNIFORM MECHANICAL CODE
Chapter 17 Geothermal Energy Systems and Ambient Temperature Loops. Chapter 17 regulates the design, installation, construction, and location of geothermal energy systems and ambient temperature loops (ATLs). This chapter provides the minimum safety requirements for various types of geothermal systems, including building systems coupled with a ground-heat exchangers, submerged heat exchangers using water-based fluid as a heat transfer medium, and groundwater (well). For ease of use and clarification on the applicability of geothermal provisions, Chapter 17 is divided into five parts pertaining to general provisions for all types of geothermal systems, closed-loop systems, open-loop systems, direct-exchange (DX) systems, and ambient temperature loops. For district ambient temperature loops, including those utilizing multiple hybrid systems, Part I through Part V are applicable.
In order to properly design a geothermal system, it is important to know the seasonal variation in the soil temperature, as well as the soil’s inherent capability to store and transmit heat, namely its heat capacity and thermal conductivity. In addition, a properly designed heat pump distribution system is essential for the distribution of geothermal energy.
Materials for piping and tubing must meet the working temperature and pressure of the system. Furthermore, materials must be compatible with the transfer medium to prevent deformation, bursting, or any chemical action between the material and the transfer medium. Approved materials for indoor piping, fittings, and accessories that are a part of a groundwater system as well as the allowable joining methods for piping or tubing are provided for application and enforcement purposes.
Chapter 18 Referenced Standards. Chapter 18 provides two comprehensive tables with referenced standards. The standards listed in Table 1801.1 are applied as indicated in the applicable reference section(s). A list of additional approved standards, publications, practices, and guides that are not referenced in specific sections appear in Table 1801.2.
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 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 tables are 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 tables list the title of the standard, the edition, and any addenda. Contact information for each publishing agency is provided at the end of the chapter.
CEBC § 1.2 Medium relevance — show source text
[BS] TABLE C202.1.2—SUPPLEMENT FASTENERS AT PANEL EDGES AND INTERMEDIATE FRAMING Col2 Col3 Col4 Col5 EXISTING FASTENERS EXISTING FASTENER
SPACING (EDGE OR
INTERMEDIATE
SUPPORTS)MAXIMUM
SUPPLEMENTAL
FASTENER SPACING
FOR
130 MPH <****Vult ≤ 140 MPHMAXIMUM SUPPLEMENTAL
FASTENER SPACING FOR
INTERIOR ZONEc LOCATIONS
FOR MPHVult > 140 MPH AND
EDGE ZONES NOT COVERED
BY THE COLUMN TO THE
RIGHTEDGE ZONEd FOR
Vult > 160 MPH AND EXPOSURE C,
OR
Vult > 180 MPH AND EXPOSURE BStaples or 6d Any 6″ o.c.b 6″ o.c.b 4″ o.c.b at panel edges and
4″ o.c.b at intermediate supports8d clipped head or
round head smooth
shank6″ o.c. or less None necessary None necessary along edges of
panels but 6″ o.c.b at interme-
diate supports of panel4″ o.c.a at panel edges and
4″ o.c.a at intermediate supports8d clipped head or
round head ring shank6″ o.c. or less None necessary None necessary 4″ o.c.a at panel edges and
4″ o.c.a at intermediate supports8d clipped head or
round head smooth
shankGreater than 6″ o.c. 6″ o.c.a 6″ o.c.a along panel edges and
6″ o.c.b at intermediate
supports of panel4″ o.c.a at panel edges and
4″ o.c.a at intermediate supports8d clipped head or
round head ring shankGreater than 6″ o.c. 6″ o.c.a 6″ o.c.a 4″ o.c.a at panel edges and
4″ o.c.a at intermediate supportsFor SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Maximum spacing determined based on existing fasteners and supplemental fasteners.
b. Maximum spacing determined based on supplemental fasteners only.
c. Interior zone = sheathing that is not located within 4 feet of the perimeter edge of the roof or within 4 feet of each side of a ridge.
d. Edge zone = sheathing that is located within 4 feet of the perimeter edge of the roof and within 4 feet of each side of a ridge.For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Maximum spacing determined based on existing fasteners and supplemental fasteners.
b. Maximum spacing determined based on supplemental fasteners only.
c.CEBC § 1.10.3 Medium relevance — show source text
1.10.3 OSHPD 3. 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.
Application— Licensed clinics and any freestanding building under a hospital license where outpatient clinical 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 and 1.10, Chapter 1, Division I, and as adopted in Chapter 1, Division II.
3. Title 24, Part 10, California Code of Regulations: Sections 1.1 and 1.10, Chapter 1, Division I, and as adopted in 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.
The provisions of Title 24, Part 10, as adopted and amended by OSHPD, shall apply to the applications listed in Section 1.10.3.
OSHPD 3 adopts the following building standards in Title 24, Part 10: Chapters 2, 3, 4, 5 and 16.
Authority— 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.
1.10.4 OSHPD 4. 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.
Application— Correctional treatment centers.
Enforcing agency— Health Care Access and Information/Office of Statewide Hospital Planning and Development (OSHPD). The office shall enforce the California Energy Commission – Energy Regulations, 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.
1.10.4.1 Applicable administrative standards. 1. Title 24, Part 1, California Code of Regulations: Chapter 7.
1-14 2025 CALIFORNIA EXISTING BUILDING CODE
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ADMINISTRATION
2. Title 24, Part 2, California Code of Regulations: Sections 1.1 and 1.10, Chapter 1, Division I, and as adopted in Chapter 1, Division II.
3. Title 24, Part 10, California Code of Regulations: Sections 1.1 and 1.10, Chapter 1, Division I, and as adopted in 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.
CEBC § 25.4 Medium relevance — show source text
or less|None necessary|None necessary|4″ o.c.a at panel edges and
4″ o.c.a at intermediate supports| |8d clipped head or
round head smooth
shank|Greater than 6″ o.c.|6″ o.c.a|6″ o.c.a along panel edges and
6″ o.c.b at intermediate
supports of panel|4″ o.c.a at panel edges and
4″ o.c.a at intermediate supports| |8d clipped head or
round head ring shank|Greater than 6″ o.c.|6″ o.c.a|6″ o.c.a|4″ o.c.a at panel edges and
4″ o.c.a at intermediate supports| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Maximum spacing determined based on existing fasteners and supplemental fasteners.
b. Maximum spacing determined based on supplemental fasteners only.
c. Interior zone = sheathing that is not located within 4 feet of the perimeter edge of the roof or within 4 feet of each side of a ridge.
d. Edge zone = sheathing that is located within 4 feet of the perimeter edge of the roof and within 4 feet of each side of a ridge.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Maximum spacing determined based on existing fasteners and supplemental fasteners.
b. Maximum spacing determined based on supplemental fasteners only.
c. Interior zone = sheathing that is not located within 4 feet of the perimeter edge of the roof or within 4 feet of each side of a ridge.
d. Edge zone = sheathing that is located within 4 feet of the perimeter edge of the roof and within 4 feet of each side of a ridge.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Maximum spacing determined based on existing fasteners and supplemental fasteners.
b. Maximum spacing determined based on supplemental fasteners only.
c. Interior zone = sheathing that is not located within 4 feet of the perimeter edge of the roof or within 4 feet of each side of a ridge.
d. Edge zone = sheathing that is located within 4 feet of the perimeter edge of the roof and within 4 feet of each side of a ridge.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Maximum spacing determined based on existing fasteners and supplemental fasteners.
b. Maximum spacing determined based on supplemental fasteners only.
c. Interior zone = sheathing that is not located within 4 feet of the perimeter edge of the roof or within 4 feet of each side of a ridge.
d. Edge zone = sheathing that is located within 4 feet of the perimeter edge of the roof and within 4 feet of each side of a ridge.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Maximum spacing determined based on existing fasteners and supplemental fasteners.
b. Maximum spacing determined based on supplemental fasteners only.
c.CEBC § 3.1 Medium relevance — show source text
All screw sizes shown are minimum.
c. NR = Uplift connector not required.
d. Foundation anchor straps are permitted in place of anchor bolts, if spaced as required to provide equivalent anchorage to the required anchor bolts and installed in accor-
dance with manufacturer’s requirements.
e. See Figure R603.3.1(4) for details.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s, 1 foot = 304.8 mm, 1 pound = 4.45 N.
a. Anchor bolts are to be located not more than 12 inches from corners or the termination of bottom tracks, such as at door openings or corners. Bolts are to extend not less than
15 inches into masonry or 7 inches into concrete.
b. All screw sizes shown are minimum.
c. NR = Uplift connector not required.
d. Foundation anchor straps are permitted in place of anchor bolts, if spaced as required to provide equivalent anchorage to the required anchor bolts and installed in accor-
dance with manufacturer’s requirements.
e. See Figure R603.3.1(4) for details.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s, 1 foot = 304.8 mm, 1 pound = 4.45 N.
a. Anchor bolts are to be located not more than 12 inches from corners or the termination of bottom tracks, such as at door openings or corners. Bolts are to extend not less than
15 inches into masonry or 7 inches into concrete.
b. All screw sizes shown are minimum.
c. NR = Uplift connector not required.
d. Foundation anchor straps are permitted in place of anchor bolts, if spaced as required to provide equivalent anchorage to the required anchor bolts and installed in accor-
dance with manufacturer’s requirements.
e. See Figure R603.3.1(4) for details.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s, 1 foot = 304.8 mm, 1 pound = 4.45 N.
a. Anchor bolts are to be located not more than 12 inches from corners or the termination of bottom tracks, such as at door openings or corners. Bolts are to extend not less than
15 inches into masonry or 7 inches into concrete.
b. All screw sizes shown are minimum.
c. NR = Uplift connector not required.
d. Foundation anchor straps are permitted in place of anchor bolts, if spaced as required to provide equivalent anchorage to the required anchor bolts and installed in accor-
dance with manufacturer’s requirements.
e. See Figure R603.3.1(4) for details.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s, 1 foot = 304.8 mm, 1 pound = 4.45 N.
a. Anchor bolts are to be located not more than 12 inches from corners or the termination of bottom tracks, such as at door openings or corners. Bolts are to extend not less than
15 inches into masonry or 7 inches into concrete.
b. All screw sizes shown are minimum.
c. NR = Uplift connector not required.
d.CEBC § 1.3 Medium relevance — show source text
SECTION BO106—ADDITION
BO106.1 General. Where existing buildings with the addition are within the scope of this code, additions shall comply with this section and other applicable provisions of this code for new construction or as permitted by this appendix. Engineered design in accordance with Section R301.1.3 shall be permitted to meet the requirements of this section.
BO106.2 Structure for horizontal additions. Where an addition involves new construction attached to an existing building, the new construction shall meet all of the structural requirements of this code for new construction. Alterations to the existing building shall comply with the requirements governing alterations within this code. In wood light-frame additions, connection of the structural components shall be permitted to be provided using wall top plates and addition studs that abut the existing building. Wall top plates shall be lapped and spliced in accordance with Section R602.3.2. Abutting studs shall be fastened in accordance with Table R602.3(1).
Exception: The addition structure shall be permitted to be connected to the existing building in accordance with accepted engineering practice.
BO106.3 Structure for vertical additions. Where an addition involves new construction that adds a story to any part of the existing building or vertically increases the height of any part of the existing building, the new construction and the existing building together shall be shown to comply with, or altered to comply with, all of the structural requirements of this code for new construction.
Exception: Where the new structure and the existing structure together are evaluated in accordance with accepted engineering practice and are shown to be sufficient to support the combined loads from the new structure and existing structure, no structural alterations are required.
SECTION BO107—RELOCATED BUILDINGS
BO107.1 General. Residential buildings or structures moved into or within the jurisdiction are not required to comply with the requirements for new construction under this code, provided they comply with all of the following conditions:
The building shall be safe for human occupancy as determined by the California Fire Code and the International Property Maintenance Code .
Any repair, alteration or change of use undertaken within the relocated structure shall comply with the requirements of this code applicable to the work being performed.
Any field fabricated elements shall comply with the applicable requirements of this code.
SECTION BO108—REFERENCED STANDARDS
BO108.1 General. See Table BO108.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title and the section or sections of this appendix that reference the standard.
TABLE BO108.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTION HEREIN REFERENCED CEBC—25 California Existing Building Code BO102.8 CFC—25 California Fire Code BO107.1 IPMC—24 International Property Maintenance Code® BO107.1 APPENDIX BO-6 2025 CALIFORNIA RESIDENTIAL CODE
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CA RESERVED
2025 CALIFORNIA RESIDENTIAL CODE APPENDIX CA-1
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APPENDIX CA-2 2025 CALIFORNIA RESIDENTIAL CODE
CEBC § 3.5 Medium relevance — show source text
E107.3.5 Structures located in a wildland-urban interface zone. Tiny houses and manufactured homes that are located in a wildland-urban interface area shall be provided with defensible space in accordance with Section 603 of the California Wildland- Urban Interface Code .
APPENDIX E-4 2025 CALIFORNIA EXISTING BUILDING CODE
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APPENDIX E—TEMPORARY EMERGENCY USES
SECTION E108—REFERENCED STANDARDS
E108.1 General. See Table E108.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title and the section or sections of this appendix referenced in the standard.
TABLE E108.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS REFERENCED HEREIN IBC—24 International Building Code® E106.3, E106.5.1 IFC—24 International Fire Code® E106.4, E106.4.1, E106.4.2, E106.4.5, E106.7.1,
E107.1.3, E107.2.2, E107.3.3, E107.3.4IWUIC—24 International Wildland-Urban Interface Code® E107.3.5 NFPA 550—2017 Guide to the Fire Safety Concepts Tree E106.4.3 2025 CALIFORNIA EXISTING BUILDING CODE APPENDIX E-5
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APPENDIX E-6 2025 CALIFORNIA EXISTING BUILDING CODE
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CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE
RESOURCE A
GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES
Not adopted by the State of California (May be available for adoption by local ordinance. See Section 1.1.11.)
CEBC § 3.1 Medium relevance — show source text
2025 CALIFORNIA FIRE CODE APPENDIX K-5
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
APPENDIX K—CONSTRUCTION REQUIREMENTS FOR EXISTING AMBULATORY CARE FACILITIES
K104.3 Existing elevators. Existing elevators, escalators, dumbwaiters and moving walks shall comply with the requirements of Sections K104.3.1 and K104.3.2.
K104.3.1 Elevators, escalators, dumbwaiters and moving walks. Existing elevators, escalators, dumbwaiters and moving walks in ambulatory care facilities required to be separated by Section 422 of the California Building Code shall comply with Cali- fornia Code of Regulations, Title 8, Division 1, Chapter 4, Subchapter 6, Elevator Safety Orders.
K104.3.2 Elevator emergency operation. Existing elevators with a travel distance of 25 feet (7620 mm) or more above or below the main floor or other level of a building and intended to serve the needs of emergency personnel for firefighting or rescue purposes shall be provided with emergency operation in accordance with California Code of Regulations, Title 8, Division 1, Chapter 4, Subchapter 6, Elevator Safety Orders.
SECTION K105—REFERENCED STANDARDS
K105.1 General. See Table K105.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.
TABLE K105.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED CBC—25 California Building Code K101.2, K102.1, K102.2, K102.2.2, K102.2.3,
K102.2.4, K102.2.5, K102.2.6, K102.5.1,
K102.5.2.1, K102.5.2.2, K102.5.4, K102.5.5,
K103.1, K103.2, K103.4.1, K103.4.2, K104.3.1ASME A17.3—2023 California Code of Regulations, Title 8, Division 1,
Chapter 4, Subchapter 6, Elevator Safety OrdersK104.3.1, K104.3.2 APPENDIX K-6 2025 CALIFORNIA FIRE CODE
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CALIFORNIA FIRE CODE – MATRIX ADOPTION TABLE
APPENDIX L – REQUIREMENTS FOR FIREFIGHTER AIR REPLENISHMENT SYSTEMS
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
(Not adopted by the State Fire Marshal)
CEBC § 12-7 Medium relevance — show source text
- When tested as follows, flames shall not reach the top edge of the specimen. The test shall be conducted in a draft free area, on a specimen of the material 12 inches by 12 inches (305 mm by 305 mm) suspended at a 45-degree angle from the horizontal with the upper and lower edges in a horizontal plane. The test flame shall be 3 inches (76 mm) long from a Bunsen burner of approximately [1] / 2 -inch (13 mm) inside diameter with the air supply completely shut off. The burner shall be positioned so that its top is 1 inch (25 mm) vertically below a point on the lower surface of the test specimen, 1 inch (25 mm) up from its lower horizontal edge and midway between the inclined edges. The exposure to the test flame and the duration of test shall be for a period of 2 minutes.
2025 CALIFORNIA REFERENCED STANDARDS CODE 35
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
36 2025 CALIFORNIA REFERENCED STANDARDS CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
12-7A MATERIALS AND CONSTRUCTION METHODS
FOR EXTERIOR WILDFIRE EXPOSURE
EXTERIOR WALL SIDING AND SHEATHING
SFM STANDARD 12-7A-1
12-7A-1.1 Application. The minimum design, construction and performance standards set forth herein for exterior wall siding and sheathing are those deemed necessary to establish conformance to the provisions of these regulations. Materials and assemblies that meet the performance criteria of this standard are acceptable for use as defined in California Building Standards Code.
12-7A-1.2 Scope. This standard evaluates the performance of exterior walls of structures when exposed to direct flames.
12-7A-1.3 Referenced documents.
ASTM E2257, Test Method for Room Fire Test of Wall and Ceiling Materials and Assemblies.
ASTM D4442, Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials.
ASTM D4444, Test Methods for Use and Calibration of Hand-Held Moisture Meters.
California Building Code, Chapter 7A.
12-7A-1.4 Definitions.
- Siding (cladding). Any material that constitutes the exposed exterior covering of an exterior wall and is applied over sheathing or is directly attached to the wall structural system.
- Sheathing. The material placed on an exterior wall beneath cladding or siding and is directly attached to the wall structural system.
12-7A-1.5 Summary of test method.
- Direct flame exposure. This test method provides for the direct flame exposure of a wall specimen to a flame source centered at the base of a 4-foot by 8-foot (1220 mm by 2440 mm) test assembly.
- Gas burner. The method employs a gas burner to produce a diffusion flame in contact with the test wall assembly.
- Heat output. The gas burner produces a prescribed net rate of heat output of 8535 Btu/min (150 kW) for a period of 10 minutes, after which the flame exposure is terminated.
- Resistance to fire penetration. The test method measures the ability of the wall system to resist fire penetration from the exterior to the unexposed side of the test assembly under the conditions of exposure.
CEBC § 101.4.8 Medium relevance — show source text
[OSHPD 1R, 2, 4 & 5] The provisions of the California Existing Building Code, Chapters 2, 3, 4 and 5 shall apply to all matters govern- ing the repairs, alterations, change of occupancy, additions and relocation of existing structures and portions thereof under OSHPD jurisdiction.
101.4.8 Wildland-urban interface. The provisions of Part 7, the California Wildland-Urban Interface Code shall apply to buildings and structures built in the wildland-urban interface (WUI) or a Fire Hazard Severity Zone.
SECTION 102—APPLICABILITY
[A] 102.1 General. Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall be applicable. Where, in any specific case, different sections of this code specify different materials, methods of construction or other requirements, the most restrictive shall govern.
[A] 102.2 Other laws. The provisions of this code shall not be deemed to nullify any provisions of local, state or federal law.
[A] 102.3 Application of references. References to chapter or section numbers, or to provisions not specifically identified by number, shall be construed to refer to such chapter, section or provision of this code.
[A] 102.4 Referenced codes and standards. The codes and standards referenced in this code shall be considered to be part of the requirements of this code to the prescribed extent of each such reference and as further regulated in Sections 102.4.1 through 102.4.4.
[A] 102.4.1 Conflicts. Where conflicts occur between provisions of this code and referenced codes and standards, the provisions of this code shall apply.
[A] 102.4.2 Provisions in referenced codes and standards. Where the extent of the reference to a referenced code or standard includes subject matter that is within the scope of this code or the California Codes specified in Section 101.4, the provisions of this code or the California Codes specified in Section 101.4, as applicable, shall take precedence over the provisions in the referenced code or standard.
102.4.3 Code references. [OSHPD 1, 1R, 2, 3, 4, 5 & 6, DSA-SS & DSA-SS/CC] All reference to International Codes or other similar codes in referenced standards shall be replaced by equivalent provisions in the California Building Standards Codes.
102.4.4 Reference in standards. [OSHPD 1, 1R, 2, 3, 4, 5 & 6, DSA-SS & DSA-SS/CC] All references listed in reference standards shall be replaced by referenced standards listed in Chapter 35 of this code, where applicable, and shall include all amendments to the reference standards in this code.
[A] 102.5 Partial invalidity. In the event that any part or provision of this code is held to be illegal or void, this shall not have the effect of making void or illegal any of the other parts or provisions.
[A] 102.6 Existing structures. The legal occupancy of any structure existing on the date of adoption of this code shall be permitted to continue without change, except as otherwise specifically provided in this code, the California Existing Building Code or the Cali- fornia Fire Code .
CEBC § 9.5 Medium relevance — show source text
The specimen shall be suspended vertically with its lower edge 2 inches (51 mm) above the top of a [3] / 8 inch (9.5 mm) diameter Bunsen Burner. The test shall be performed in a draft-free area.
The flames from the burner shall be 4 inches (101 mm) long and shall be adjusted with sufficient air supply to eliminate any yellow flame tips but without any distinct inner blue cone.
The specimen shall be exposed to the flame at each corner and at not less than one other point along the lower edge. Each exposure shall be of sufficient duration to determine if the material will ignite and continue to burn, but shall be not less than 20 seconds.
The criteria for acceptance shall be as follows: (A) There shall be not more than intermittent flaming appreciably beyond the area exposed to the test flame. (B) Flame shall not reach the top of the specimen. (C) On removing the test flame there shall be not more than 1 second of after flaming except there may be nonprogressive flaming of short duration in areas of accumulated char which were directly exposed to the test flame.
Section 12-7-502
(a) Framed rigid combustible decorative material. Rigid combustible decorative material and assemblies of materials not more than [1] / 4 inch (6 mm) in thickness used for folding doors, room dividers, decorative screens and similar applications, and which are installed with all edges protected, shall conform to the following:
All exposed edges shall be protected with frames of metal or other noncombustible material, or solid wood of minimum [1] / 4 inch (6 mm) dimension.
The total square foot area of the material shall not exceed ten percent of that of the floor area of the room in which the material is installed.
When tested as follows, flames shall not reach the top edge of the specimen. The test shall be conducted in a draft free area, on a specimen of the material 12 inches by 12 inches (305 mm by 305 mm) suspended at a 45-degree angle from the horizontal with the upper and lower edges in a horizontal plane. The test flame shall be 3 inches (76 mm) long from a Bunsen burner of approximately [1] / 2 -inch (13 mm) inside diameter with the air supply completely shut off. The burner shall be positioned so that its top is 1 inch (25 mm) vertically below a point on the lower surface of the test specimen, 1 inch (25 mm) up from its lower horizontal edge and midway between the inclined edges. The exposure to the test flame and the duration of test shall be for a period of 2 minutes.
2025 CALIFORNIA REFERENCED STANDARDS CODE 35
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
36 2025 CALIFORNIA REFERENCED STANDARDS CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
12-7A MATERIALS AND CONSTRUCTION METHODS
FOR EXTERIOR WILDFIRE EXPOSURE
EXTERIOR WALL SIDING AND SHEATHING
SFM STANDARD 12-7A-1
12-7A-1.1 Application. The minimum design, construction and performance standards set forth herein for exterior wall siding and sheathing are those deemed necessary to establish conformance to the provisions of these regulations. Materials and assemblies that meet the performance criteria of this standard are acceptable for use as defined in California Building Standards Code.
Frequently asked questions
Where exactly in the CEBC do I look to find the edition of a referenced standard?
Open Chapter 16 (the Referenced Standards chapter) and find the entry for the standard; Chapter 16 lists the promulgator, edition/effective date and the CEBC sections that cite it.
If a standard in Chapter 16 refers to another code (for example the IBC), which text controls?
The CEBC controls. § 102.4 explains that where referenced standards include subject matter within the scope of the CEBC, the CEBC provisions take precedence; also check § 102.4.3–.4 for substitution rules.
Do appendices use Chapter 16 or their own lists?
Appendices commonly include their own "Referenced Standards" sections/tables (e.g., Appendix B, C, E, A). When an appendix governs your work, use the appendix list for that appendix’s provisions.
A standard in Chapter 16 was updated last year—should I use the new edition?
No — use the edition/date that the CEBC lists in Chapter 16 unless the CEBC is amended to adopt the newer edition. Always verify the edition shown in § 16.
Some state agency work is governed by OSHPD/DSA — does Chapter 16 still apply?
Chapter 16 lists standards broadly, but agency adoption varies. Consult the CEBC adoption matrix and agency‑specific notes — some agencies adopt the chapter in full, others adopt selected sections.
More in California Existing Building Code
- Administration and Definitions (Scope, enforcement, code official duties, definitions)
- Provisions for All Compliance Methods (general requirements that apply to all compliance options; Chapter 3 / 3A)
- Seismic retrofit and evaluation (Appendix A and seismic provisions/sections for evaluation and retrofit)
- Referenced Standards and Appendices (Chapter 16 and Appendices A–E, Resource A)
- Repairs (Chapter 4 — repair-specific rules for materials, means of egress, structural, MEP, etc.)
- Alterations — Level 1, Level 2, Level 3 (technical requirements for each alteration level; Chapters 7–9)
- Change of Occupancy and Additions (requirements for occupancy changes and additions; Chapters 10–11)
- Compliance Methods — Prescriptive, Work Area, Performance (Chapters 5, 6–11, 13)
- Relocated Buildings (requirements for buildings moved or relocated; Chapter 14)
- Construction Safeguards (site safety, means of egress and life-safety during construction; Chapter 15)
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