CRSC · California Referenced Standards Code
Where are the CRSC engineering regulations on materials quality and design located?
The CRSC chapters 12-16-1 and 12-16-2 do not list material design formulas; they tell you which national standards to use for certification—**ANSI/ASCE/SEI 25‑16** for earthquake gas shutoffs and **ASTM F2138 / ANSI Z21.93‑2017/CSA 6.30 (up to 5 psig)** for excess flow valves—and they require installations comply with the California Plumbing Code (see **§ 12-16-101; § 12-16-101.1; § 12-16-201; § 12-16-201.1**) .
Last reviewed: July 6, 2026
What the code requires — 2-4 sentences
The California Referenced Standards Code places the engineering regulations for two specific gas‑related materials/design topics in CHAPTER 12-16-1 and CHAPTER 12-16-2. The CRSC does not reproduce detailed material specs itself; instead it identifies the applicable external standards that must be used for certification: ANSI/ASCE/SEI 25-16 for Earthquake‑Actuated Automatic Gas Shutoff Devices (§ 12-16-101) and ASTM F2138-12(2017) and ANSI Z21.93‑2017/CSA 6.30‑2017 for Residential Excess Flow Actuated Automatic Gas Shutoff Valves (including the pressure limit of up to 5 psig) (§ 12-16-201) . Each installation of a qualifying, customer‑owned device must be done in accordance with the California Plumbing Code as noted in § 12-16-101.1 and § 12-16-201.1 .
The CRSC chapters 12-16-1 and 12-16-2 locate requirements by naming the specific national standards to be used for certification; follow those standards and the California Plumbing Code for installation.
Requirements in detail
What each chapter does (plain structure)
- CHAPTER 12-16-1 identifies the standard used by the Division of the State Architect for certification of Earthquake‑Actuated Automatic Gas Shutoff Devices: ANSI/ASCE/SEI 25‑16 (§ 12-16-101) and references installation compliance with the California Plumbing Code (§ 12-16-101.1) .
- CHAPTER 12-16-2 identifies the standards used by the Division of the State Architect for certification of Residential Excess Flow Actuated Automatic Gas Shutoff Valves: ASTM F2138‑12(2017) and ANSI Z21.93‑2017/CSA 6.30‑2017 (for pressure up to 5 psig) and requires installation per the California Plumbing Code (§ 12-16-201; § 12-16-201.1) .
Decision-relevant dimensions and where to find them
| Decision factor | Required value/threshold | Where the CRSC points you (Code Reference) |
|---|---|---|
| Device type — earthquake shutoff | Use ANSI/ASCE/SEI 25‑16 | § 12-16-101 |
| Installation of customer‑owned device | Must comply with California Plumbing Code | § 12-16-101.1 |
| Device type — residential excess flow valve | Use ASTM F2138‑12(2017) or ANSI Z21.93‑2017/CSA 6.30‑2017 | § 12-16-201 |
| Maximum pressure noted in CRSC text | Up to 5 psig (as cited for ANSI Z21.93/CSA 6.30) | § 12-16-201 |
| Installation of customer‑owned EFV | Must comply with California Plumbing Code | § 12-16-201.1 |
How to use these CRSC entries
- Treat the CRSC chapters as referencers (they name the mandatory external standards for certification). The CRSC text itself is short — it tells you which standard applies and that installations must follow the California Plumbing Code; the technical design and test criteria are in the named standards (for example, ANSI/ASCE/SEI 25‑16 or ASTM F2138) .
- Certification decisions, product testing, and detailed quality/design specs come from the named standards — obtain and apply those documents when designing, specifying, or certifying components.
Exceptions & special cases
- The CRSC text distinguishes customer‑owned devices: when a device is customer‑owned and satisfies the standard, installation still must comply with the California Plumbing Code — see § 12-16-101.1 and § 12-16-201.1 .
- The CRSC entries do not provide alternate technical criteria or numeric design formulas; if your situation involves pressures or service conditions outside what's explicitly named (for example, EFVs above 5 psig), the CRSC text does not authorize those — you must consult the named standards and the Plumbing Code, and the CRSC does not provide a waiver or an alternate design text for those cases .
- If you need detailed material quality tests, strength values, or performance test procedures, the CRSC points you to the external standard — the CRSC chapter text itself does not include those test procedures.
Common mistakes
- Assuming the CRSC chapters contain full technical specs. They do not — they only identify which external standards apply (e.g., ANSI/ASCE/SEI 25‑16, ASTM F2138, ANSI Z21.93/CSA 6.30) and refer installation to the California Plumbing Code (§ 12-16-101; § 12-16-201; § 12-16-101.1; § 12-16-201.1) .
- Installing an excess flow valve on a service above 5 psig without confirming the applicable standard permits it; the CRSC text calls out the “up to 5 psig” range for ANSI Z21.93/CSA 6.30, so be sure the device and operating pressure match the standard cited in § 12-16-201 .
- Failing to follow the California Plumbing Code for installation of certified, customer‑owned devices — the CRSC explicitly requires that compliance in § 12-16-101.1 and § 12-16-201.1 .
Worked example — concrete scenario with numbers
Scenario: A homeowner proposes to install a customer‑owned excess flow valve on their natural gas service. The service operating pressure is 2.5 psig.
Step 1 — Check applicable CRSC chapter: CHAPTER 12-16-2 identifies the applicable standards for residential excess flow valves and calls out ASTM F2138‑12(2017) and ANSI Z21.93‑2017/CSA 6.30‑2017 (for pressure up to 5 psig) — see § 12-16-201 .
Step 2 — Confirm pressure compatibility: The homeowner’s service pressure is 2.5 psig, which is within the “up to 5 psig” range cited in § 12-16-201, so the device must be certified to one of the named standards for that pressure range .
Step 3 — Installation rule: Because this is a customer‑owned device, installation must be performed in accordance with the California Plumbing Code, as required by § 12-16-201.1 .
Conclusion: Do not rely on the CRSC for the test/spec details — obtain the manufacturer's certification to ASTM F2138 or ANSI Z21.93/CSA 6.30, verify rated service pressure ≤ 5 psig, and install per the California Plumbing Code in accordance with § 12-16-201 and § 12-16-201.1 .
Related provisions
- § 12-16-101 — Earthquake‑Actuated Automatic Gas Shutoff Devices; identifies ANSI/ASCE/SEI 25‑16 as the applicable standard .
- § 12-16-101.1 — Requires installations of customer‑owned devices that satisfy the standard to comply with the California Plumbing Code .
- § 12-16-201 — Residential Excess Flow Actuated Automatic Gas Shutoff Valves; identifies ASTM F2138‑12(2017) and ANSI Z21.93‑2017/CSA 6.30‑2017 (up to 5 psig) as applicable standards .
- § 12-16-201.1 — Requires installations of customer‑owned EFVs that satisfy the standard to comply with the California Plumbing Code .
Code references
Grounded in the retrieved California Referenced Standards Code — click a citation to read the verbatim passage:
CRSC § 12-7 High relevance — show source text
CHAPTER 12-7-1 FIRE-RESISTIVE STANDARDS. . . . . . . . . . 13
CHAPTER 12-7-2 FIRE-RESISTIVE STANDARDS
RESERVED . . . . . . . . . . . . . . . . . . . . . . . . . 23
CHAPTER 12-7-3 FIRE-RESISTIVE STANDARDS. . . . . . . . . . 25
CHAPTER 12-7-4 FIRE-RESISTIVE STANDARDS. . . . . . . . . . 31
CHAPTER 12-7-5 FIRE-RESISTIVE STANDARDS. . . . . . . . . . 35
CHAPTER 12-7A MATERIALS AND CONSTRUCTION
METHODS FOR EXTERIOR WILDFIRE
EXPOSURE . . . . . . . . . . . . . . . . . . . . . . . . . 37
CHAPTER 12-8-1 FIRE-RESISTIVE STANDARDS FOR
FIRE PROTECTION . . . . . . . . . . . . . . . . . . 51
APPENDIX 12-8-1A CALCULATION OF THE TOTAL RATE
OF HEAT AND CARBON MONOXIDE OR
CARBON DIOXIDE PRODUCTION . . . . . . . 63
APPENDIX 12-8-1B GUIDE TO MOUNTING TECHNIQUES FOR
WALL AND CEILING INTERIOR FINISH
MATERIAL. . . . . . . . . . . . . . . . . . . . . . . . . . 67
CHAPTER 12-10-1 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
CHAPTER 12-10-2 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
CHAPTER 12-10-3 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
CHAPTERS 12-11A AND 12-11B
BUILDING AND FACILITY ACCESS
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 85
CHAPTER 12-12 RESERVED . . . . . . . . . . . . . . . . . . . . . . . . . 87
CHAPTER 12-13 STANDARDS FOR INSULATING
MATERIAL. . . . . . . . . . . . . . . . . . . . . . . . . . 89
CHAPTER 12-16-1 ENGINEERING REGULATIONS—QUALITY
AND DESIGN OF THE MATERIALS OF
CONSTRUCTION . . . . . . . . . . . . . . . . . . . 101
CHAPTER 12-16-2 ENGINEERING REGULATIONS—QUALITY
AND DESIGN OF THE MATERIALS OF
CONSTRUCTION . . . . . . . . . . . . . . . . . . . 103
CRSC § 12-16 High relevance — show source text
CHAPTER 12-16-1 ENGINEERING REGULATIONS—QUALITY
AND DESIGN OF THE MATERIALS OF
CONSTRUCTION . . . . . . . . . . . . . . . . . . . 101
CHAPTER 12-16-2 ENGINEERING REGULATIONS—QUALITY
AND DESIGN OF THE MATERIALS OF
CONSTRUCTION . . . . . . . . . . . . . . . . . . . 103
CHAPTER 12-31C RADIATION SHIELDING STANDARDS . . 105
CHAPTER 12-71 AIR FILTERS. . . . . . . . . . . . . . . . . . . . . . . 107
CHAPTER 12-72-1 PROTECTIVE SIGNALING SYSTEMS . . . 109
CHAPTER 12-72-2 PROTECTIVE SIGNALING SYSTEMS . . . 123
CHAPTER 12-72-3 PROTECTIVE SIGNALING SYSTEMS . . . 133
HISTORY NOTE APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
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PART 12 CROSS REFERENCE TABLE
(Cross reference table is nonregulatory, intended only as an aid to the code user.)
PART 12
STANDARDSUBJECT ADOPTING
AGENCYASSOCIATED TITLE 24
BUILDING STANDARDChapter 12-3 Releasing systems for security bars in
dwellingsSFM Part 2, Sections 1031.2.1, 1031.6, 1032.7
Part 2.5, Sections R319.1.1 and R319.4.4
Part 9, Sections 1031.2.1, 1031.6, 1032.7
Appendix 4 Section 452.1.5 and Title 19 provisions 4.1, 4.2, 4.3,
4.4, 4.5, 4.6 reprinted in Part 9
Part 10, Section 505.4Chapter 12-4A Laboratory animal quarters standards DPH Part 2, Section 1236 Chapter 12-4-1 Stage and Platforms SFM Part 2, Sections 410.2.7, 410.2.7.1, 410.2.7.2
Part 9, Sections 105.6.51, 4809Chapter 12-7-1 Fire-resistive standards. CRSC § 12-10 High relevance — show source text
CHAPTER 12-10-1 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
CHAPTER 12-10-2 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
CHAPTER 12-10-3 EXITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
CHAPTERS 12-11A AND 12-11B
BUILDING AND FACILITY ACCESS
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 85
CHAPTER 12-12 RESERVED . . . . . . . . . . . . . . . . . . . . . . . . . 87
CHAPTER 12-13 STANDARDS FOR INSULATING
MATERIAL. . . . . . . . . . . . . . . . . . . . . . . . . . 89
CHAPTER 12-16-1 ENGINEERING REGULATIONS—QUALITY
AND DESIGN OF THE MATERIALS OF
CONSTRUCTION . . . . . . . . . . . . . . . . . . . 101
CHAPTER 12-16-2 ENGINEERING REGULATIONS—QUALITY
AND DESIGN OF THE MATERIALS OF
CONSTRUCTION . . . . . . . . . . . . . . . . . . . 103
CHAPTER 12-31C RADIATION SHIELDING STANDARDS . . 105
CHAPTER 12-71 AIR FILTERS. . . . . . . . . . . . . . . . . . . . . . . 107
CHAPTER 12-72-1 PROTECTIVE SIGNALING SYSTEMS . . . 109
CHAPTER 12-72-2 PROTECTIVE SIGNALING SYSTEMS . . . 123
CHAPTER 12-72-3 PROTECTIVE SIGNALING SYSTEMS . . . 133
HISTORY NOTE APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
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PART 12 CROSS REFERENCE TABLE
(Cross reference table is nonregulatory, intended only as an aid to the code user.)
CRSC § 2.4 Medium relevance — show source text
SECTION 1802 A —DESIGN BASIS
1802 A .1 General. Allowable bearing pressures, allowable stresses and design formulas provided in this chapter shall be used with the allowable stress design load combinations specified in ASCE 7, Section 2.4 or the alternative allowable stress design load combinations of Section 1605 A .2. The quality and design of materials used structurally in excavations and foundations shall comply with the requirements specified in Chapters 16, 19, 21, 22 and 23. Excavations and fills shall comply with Chapter 33.
SECTION 1803 A —GEOTECHNICAL INVESTIGATIONS
1803 A .1 General. Geotechnical investigations shall be conducted in accordance with Section 1803 A .2 and reported in accordance with Section 1803A.7. The classification and investigation of the soil shall be made under the responsible charge of a California regis- tered geotechnical engineer. All recommendations contained in geotechnical and geohazard reports shall be subject to the approval of the enforcement agency. All reports shall be prepared and signed by a registered geotechnical engineer, a certified engineering geolo- gist and a registered geophysicist, where applicable.
1803 A .2 Investigations required. Geotechnical investigations shall be conducted in accordance with Sections 1803 A .3 through 1803A.6 .
Exception s : 1. Geotechnical reports are not required for one-story, wood-frame and light-steel-frame buildings of Type II or Type V construction and 4,000 square feet (371 m [2] ) or less in floor area, not located within Earthquake Fault Zones or Seismic Hazard Zones as shown in the most recently published maps from the California Geological Survey (CGS) or in seismic hazard zones as defined in the Safety Element of the local General Plan. Allowable foundation and lateral soil pressure values may be determined from Table 1806A.2.
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SOILS AND FOUNDATIONS
2. A previous report for a specific site may be resubmitted, provided that a reevaluation is made and the report is found to be currently appropriate.
1803 A .3 Basis of investigation. Soil classification shall be based on observation and any necessary tests of the materials disclosed by borings, test pits or other subsurface exploration made in appropriate locations. Additional studies shall be made as necessary to evaluate slope stability, soil strength, position and adequacy of load-bearing soils, the effect of moisture variation on soil-bearing capacity, compressibility, liquefaction and expansiveness.
CRSC § 1.1 Medium relevance — show source text
Optimum conditions to 350f.
Fast growing. Can defeat lawns.|4‐9, 14‐24| |Ulmus spp.|Elm Trees|D|100 h
70 s|Various species, check_Sunset Western Garden_
Book. Root systems are aggressive. Branch
crotches often narrow, easily split, Attracts leaf
beetles, bark beetles, leafhoppers, aphids and
scale. Care can be messy.|Various| |Washingtonia filifera|California Fan Palm|Palm/ E|60 h|Fast growing, native to California.|8,9,11‐24| |Washingtonia robusta|Mexican Fan Palm|Palm/E|100 h|Very fast growing.|8,9,11‐24| |Zelkova serrata|Sawleaf Zelkova|D|60+ h
60 s|Moderate to fast growth.|3‐21|1 Refer to the climate zone map in Sunset Western Garden Book for the climate zone in your area.
2022 – 2023 B−14
Engineering Material Specification: EMS-4123 Publication Date: 08/24/2016 Effective Date: 09/7/2016 Rev. 1a
Backfill Sand
Summary This engineering material specification (EMS) defines the minimum requirements for imported sand used in bedding and embedment backfill around gas pipe in trenches.
This EMS is used for specifying this material in the contract procurement process, applicant design and installation, local maintenance and construction, and general construction.
Target Audience Personnel involved in sourcing, engineering, construction, and supplier quality inspection.
Requirements
1 General
1.1 Backfill sand (sand) can be well or poorly graded material as determined in ASTM D2487-11, “Standard Classification of Soils for Engineering Purposes (Unified Soil Classification System).”
1.2 Sand must be free of organic and harmful materials that could cause adverse environmental impact.
1.3 Do not use blasting abrasives containing toxic elements that are at or above hazardous waste levels defined in Code of Federal Regulations (CFR) Title 40, Protection of Environment, Part 261—Identification and Listing of Hazardous Waste or California Code of Regulations.
1.4 Sand must conform to the physical properties listed in this EMS.
1.5 The responsible engineer may specify additional requirements for specific project needs.
PG&E Internal ©2017 Pacific Gas & Electric Company. All rights reserved. Page 1 of 5
Engineering Material Specification: EMS-4123 Publication Date: 08/24/2016 Effective Date: 09/7/2016 Rev. 1a
Backfill Sand
2 Grain Size Distribution Requirements
CRSC § 12-16 Medium relevance — show source text
12-16-1 ENGINEERING REGULATIONS—QUALITY AND
DESIGN OF THE MATERIALS OF CONSTRUCTION
CALIFORNIA STANDARD FOR EARTHQUAKE-ACTUATED AUTOMATIC GAS SHUTOFF SYSTEMS (SEE CCR TITLE 24, PART 2, CHAPTERS 16 AND 16A, AND CCR TITLE 24, PART 5, CHAPTER 12) STANDARD 12-16-1
DIVISION OF THE STATE ARCHITECT
Authority: Sections 19180–19183, Health and Safety Code. Reference: Section 19182, Health and Safety Code.
DIVISION 1—CONSTRUCTION
SCOPE
Sec. 12-16-101. The American Society of Civil Engineers (ASCE) requirements for “Earthquake-Actuated Automatic Gas Shutoff Devices,” ANSI/ASCE/SEI 25-16 (copyright 2016 by ASCE), shall be the applicable standard used by the Division of the State Architect for the certification of these devices.
Sec. 12-16-101.1. Each installation of a customer-owned device that satisfies this standard shall be in accordance with the California Plumbing Code (CCR Title 24, Part 5).
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12-16-2 ENGINEERING REGULATIONS—QUALITY AND
DESIGN OF THE MATERIALS OF CONSTRUCTION
CALIFORNIA STANDARD FOR RESIDENTIAL EXCESS FLOW ACTUATED AUTOMATIC GAS SHUTOFF VALVES (SEE CCR TITLE 24, PART 5, CHAPTER 12) STANDARD 12-16-2
DIVISION OF THE STATE ARCHITECT
Authority: Sections 19200–19204, Health and Safety Code. Reference: Sections 19201.5 and 19202, Health and Safety Code.
DIVISION 1—CONSTRUCTION
SCOPE
Sec. 12-16-201. The American Society for Testing and Materials (ASTM) F2138-12(2017) Standard Specification for Excess Flow Valves for Natural Gas Service, and the American National Standards Institute (ANSI) Z21.93-2017/CSA 6.30-2017 Excess Flow Valves for Natural and LP Gas with Pressure up to 5 psig, shall be the applicable standards used by the Division of the State Architect for certification of these devices.
Sec. 12-16-201.1. Each installation of a customer-owned device that satisfies this standard shall be in accordance with the California Plumbing Code (CCR Title 24, Part 5).
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12-31C RADIATION SHIELDING STANDARDS
STANDARD 12-31C-1
DEPARTMENT OF HEALTH SERVICES
CRSC § 64703-64705. Medium relevance — show source text
This installed weight per square foot shall conform with the manufacturer’s installed design density per square foot at the manufacturer’s labeled R -value.
(b) Water heater insulation kits. No water heater insulation kit shall be sold, on or after March 25, 1982, unless it has a thermal resistance of at least R-6 and is so identified.
Each water heater insulation kit sold shall include instructions which are equivalent to the Department of Energy standard practice for the installation of insulation on gas-fired, oil-fired and electric resistance water heaters, 44 Fed. Reg. pages 64703-64705.
Authority: Section 25922, Public Resources Code.
Reference: Section 25922, Public Resources Code.
HISTORY:
- Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).
- Editorial correction of subsection (a) filed 1-13-82 (Register 82, No. 2).
INTERPRETATION
Sec. 12-13-1565.
The General Counsel of the Commission shall make a determination as to the application or interpretation of any provision of this article to any person requesting such a determination. Any such request shall be submitted in writing to the Commission. The Commission shall make written replies to such inquiries and shall widely publish interpretations that have broad application or interest.
Authority: Section 25218 (e), Public Resources Code.
Reference: Sections 25920 and 25922, Public Resources Code.
HISTORY:
- Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).
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12-16-1 ENGINEERING REGULATIONS—QUALITY AND
DESIGN OF THE MATERIALS OF CONSTRUCTION
CALIFORNIA STANDARD FOR EARTHQUAKE-ACTUATED AUTOMATIC GAS SHUTOFF SYSTEMS (SEE CCR TITLE 24, PART 2, CHAPTERS 16 AND 16A, AND CCR TITLE 24, PART 5, CHAPTER 12) STANDARD 12-16-1
DIVISION OF THE STATE ARCHITECT
Authority: Sections 19180–19183, Health and Safety Code. Reference: Section 19182, Health and Safety Code.
DIVISION 1—CONSTRUCTION
SCOPE
Sec. 12-16-101. The American Society of Civil Engineers (ASCE) requirements for “Earthquake-Actuated Automatic Gas Shutoff Devices,” ANSI/ASCE/SEI 25-16 (copyright 2016 by ASCE), shall be the applicable standard used by the Division of the State Architect for the certification of these devices.
Sec. 12-16-101.1. Each installation of a customer-owned device that satisfies this standard shall be in accordance with the California Plumbing Code (CCR Title 24, Part 5).
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12-16-2 ENGINEERING REGULATIONS—QUALITY AND
CRSC § 100.0 Medium relevance — show source text
2025 CRSC Reference Standard Code
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PREFACE
This document is Part 12 of thirteen parts of the official triennial compilation and publication of the adoptions, amendments and repeal of administrative regulations to California Code of Regulations, Title 24, also referred to as the California Building Standards Code. This part is known as the California Referenced Standards Code.
The California Building Standards Code is published in its entirety every three years by order of the California legislature, with supplements published in intervening years. The California legislature delegated authority to various state agencies, boards, commissions and departments to create building regulations to implement the State’s statutes. These building regulations, or standards, have the same force of law, and take effect 180 days after their publication unless otherwise stipulated. The Califor- nia Building Standards Code applies to occupancies in the State of California as annotated.
A city, county, or city and county may establish more restrictive building standards reasonably necessary because of local climatic, geological or topographical conditions. Findings of the local condition(s) and the adopted local building standard(s) must generally be filed with the California Building Standards Commission (or other filing if indicated) to become effective, and may not be effective sooner than the effective date of this edition of the California Building Standards Code . Local building standards that were adopted and applicable to previous editions of the California Building Standards Code do not apply to this edition without appropriate adoption and the required filing.
The referenced standards contained in Part 12 are developed by the state agencies listed herein. The Part 12 Cross Reference Table herein identifies the state agency to which the standard applies, the subject of the standard and the provisions in other parts of Title 24 where the application of the standard is required.
Should you find publication (e.g., typographical) errors or inconsistencies in this code or wish to offer comments toward improving its format, please address your comments to:
California Building Standards Commission 2525 Natomas Park Drive, Suite 130 Sacramento, CA 95833-2936
Phone: (916) 263-0916 Email: cbsc@dgs.ca.gov
Web page: www.dgs.ca.gov/bsc
ACKNOWLEDGMENTS
The 2025 California Building Standards Code (Code) was developed through the outstanding collaborative efforts of the Department of Housing and Community Development, Division of the State Architect, Office of the State Fire Marshal, Department of Health Care Access and Information, California Energy Commission, California Department of Public Health, California State Lands Commission, Board of State and Community Corrections, Department of Water Resources, State Historical Building Safety Board, Department of Consumer Affairs, State Librarian, Department of Food and Agriculture, and the California Building Standards Commission (Commission).
This collaborative effort included the assistance of the Commission’s Code Advisory Committees and many other volunteers who worked tirelessly to assist the Commission in the production of this Code.
Governor Gavin Newsom
Members of the California Building Standards Commission
Secretary Amy Tong – Chair Rajesh Patel – Vice-Chair
CRSC § 1810.2.2 Medium relevance — show source text
Where deep foundation elements of the same type are being spliced, splices shall develop not less than 50 percent of the bending strength of the weaker section. Where deep foundation elements of different materials or different types are being spliced, splices shall develop the full compressive strength and not less than 50 percent of the tension and bending strength of the weaker section. Where structural steel cores are to be spliced, the ends shall be milled or ground to provide full contact and shall be full-depth welded.
Exception: For buildings assigned to Seismic Design Category A or B, splices need not comply with the 50-percent tension and bending strength requirements where justified by supporting data.
Splices occurring in the upper 10 feet (3048 mm) of the embedded portion of an element shall be designed to resist at allowable stresses the moment and shear that would result from an assumed eccentricity of the axial load of 3 inches (76 mm), or the element shall be braced in accordance with Section 1810.2.2 to other deep foundation elements that do not have splices in the upper 10 feet (3048 mm) of embedment.
1810.3.6.1 Seismic Design Categories C through F. For structures assigned to Seismic Design Category C, D, E or F splices of deep foundation elements shall develop the lesser of the following:
- The nominal strength of the deep foundation element.
- The axial and shear forces and moments from the seismic load effects including overstrength factor in accordance with Section 2.3.6 or 2.4.5 of ASCE 7.
1810.3.7 Top of element detailing at cutoffs. Where a minimum length for reinforcement or the extent of closely spaced confinement reinforcement is specified at the top of a deep foundation element, provisions shall be made so that those specified lengths or extents are maintained after cutoff.
1810.3.8 Precast concrete piles. Precast concrete piles shall be designed and detailed in accordance with ACI 318.
Exceptions:
- For precast prestressed piles in Seismic Design Category C, the minimum volumetric ratio of spirals or circular hoops required by Section 18.13.5.10.4 of ACI 318 shall not apply in cases where the design includes full consideration of load combinations specified in ASCE 7, Section 2.3.6 or Section 2.4.5 and the applicable overstrength factor, Ω 0 . In such cases, minimum transverse reinforcement index shall be as specified in Section 13.4.5.6 of ACI 318. [OSHPD 1R, 2 & 5] not permitted by OSHPD.
- For precast prestressed piles in Seismic Design Categories D through F and in Site Class A, B, BC, C, CD, D or DE sites, the minimum volumetric ratio of spirals or circular hoops required by Section 18.13.5.10.5(c) of ACI 318 shall not apply in cases where the design includes full consideration of load combinations specified in ASCE 7, Section 2.3.6 or Section 2.4.5 and the applicable overstrength factor, Ω 0 . In such cases, minimum transverse reinforcement shall be as specified in Section 13.4.5.6 of ACI 318. [OSHPD 1R, 2 & 5] not permitted by OSHPD.
CRSC § 2210.1.1.1 Medium relevance — show source text
2210.1.1.1 Structural steel. The design, fabrication and erection of structural steel shall be in accordance with Section 2202.
2210.1.1.2 Cold-formed steel. The design of cold-formed carbon and low-alloy steel structural members shall be in accordance with Section 2204.
2210.1.1.3 Steel joists. The design of steel joists shall be in accordance with Section 2207.
2210.1.1.4 Steel cable. The design, fabrication and erection of steel cables, including related connections, shall be in accordance with Section 2214.
2210.2 Seismic design. Where required, the seismic design, fabrication and erection of the structural steel seismic force-resisting system shall be in accordance with Section 2202.2.1 or 2202.2.2, as applicable.
SECTION 2211—INDUSTRIAL BOLTLESS STEEL SHELVING
2211.1 General. The design, testing and utilization of industrial boltless steel shelving shall be in accordance with MHI ANSI/MH 28.2. Where required by ASCE 7, the seismic design of industrial boltless steel shelving shall be in accordance with Chapter 15 of ASCE 7.
SECTION 2212—INDUSTRIAL STEEL WORK PLATFORMS
2212.1 General. The design, testing and utilization of industrial steel work platforms shall be in accordance with MHI ANSI/MH 28.3. Where required by ASCE 7, the seismic design of industrial steel work platforms shall be in accordance with Chapter 15 of ASCE 7.
SECTION 2213—STAIRS, LADDERS AND GUARDING FOR STEEL STORAGE RACKS AND INDUSTRIAL STEEL WORK PLATFORMS
2213.1 General. The design and installation of stairs, ladders and guarding serving steel storage racks and industrial steel work platforms shall be in accordance with MHI ANSI/MH 32.1.
SECTION 2214—STEEL CABLE STRUCTURES
2214.1 General. The design, fabrication and erection including related connections, and protective coatings of steel cables for buildings shall be in accordance with ASCE 19.
[OSHPD 1R, 2 & 5] Steel cables with glass or polymer fabric material acting as a tensile membrane structure shall be considered as an alternative system.
SECTION 2215 — ADDITIONAL REQUIREMENTS FOR COMMUNITY COLLEGES [DSA-SS/CC]
2215.1 General.
2215.1.1 Shear transfer at column base plate. Where the holes in column base plates are more than [1] / 8 inch (3 mm) larger than the anchor rods, as permitted by AISC 360, the anchor rods shall be designed for the induced bending stresses in combination with axial and shear stresses. Alternatively, shear lugs designed in accordance with ACI 318 Section 17.11 shall be permitted to transfer shear forces between column base plates and the supporting structure.
2215.2 Modifications to AISC 341.
2215.2.1 Section B5. Modify exception of Section B5.2(a) as follows:
CRSC § 0.63 Medium relevance — show source text
Staples shall have a minimum crown width of7/16 inch and shall be installed with their crowns parallel to the long dimension of the framing members.
i. For shear loads of normal or permanent load duration as defined by the ANSI/AWC NDS, the values in the table shall be multiplied by 0.63 or 0.56, respectively.|For SI: 1 inch = 25.4 mm, 1 pound per foot = 14.5939 N/m.
a. For framing of other species: (1) Find specific gravity for species of lumber in ANSI/AWC NDS. (2) For staples find shear value from table for Structural I panels (regardless of
actual grade) and multiply value by 0.82 for species with specific gravity of 0.42 or greater, or 0.65 for all other species.
b. Panel edges backed with 2-inch nominal or wider framing. Install panels either horizontally or vertically. Space fasteners maximum 6 inches on center along intermediate
framing members for3/8-inch and7/16-inch panels installed on studs spaced 24 inches on center. For other conditions and panel thickness, space fasteners maximum 12 inches
on center on intermediate supports.
c. 3/8-inch panel thickness or siding with a span rating of 16 inches on center is the minimum recommended where applied directly to framing as exterior siding. For grooved
panel siding, the nominal panel thickness is the thickness of the panel measured at the point of fastening.
d. Framing at adjoining panel edges shall be 3 inches nominal or wider.
e. Values apply to all-veneer plywood. Thickness at point of fastening on panel edges governs shear values.
f. Where panels are applied on both faces of a wall and fastener spacing is less than 6 inches on center on either side, panel joints shall be offset to fall on different framing
members, or framing shall be 3 inches nominal or thicker at adjoining panel edges.
g. In Seismic Design Category D, E or F, where shear design values exceed 350 pounds per linear foot, all framing members receiving edge fastening from abutting panels shall be
not less than a single 3-inch nominal member, or two 2-inch nominal members fastened together in accordance with Section 2306.1 to transfer the design shear value
between framing members. Wood structural panel joint and sill plate nailing shall be staggered at all panel edges. See AWC SDPWS for sill plate size and anchorage
requirements.
h. Staples shall have a minimum crown width of7/16 inch and shall be installed with their crowns parallel to the long dimension of the framing members.
i. For shear loads of normal or permanent load duration as defined by the ANSI/AWC NDS, the values in the table shall be multiplied by 0.63 or 0.56, respectively.|CRSC § 17A-21 Medium relevance — show source text
2025 CALIFORNIA BUILDING CODE 17A-21
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
SPECIAL INSPECTIONS AND TESTS
SECTION 1706 A —DESIGN STRENGTHS OF MATERIALS
1706 A .1 Conformance to standards. The design strengths and permissible stresses of any structural material that are identified by a manufacturer’s designation as to manufacture and grade by mill tests, or the strength and stress grade is otherwise confirmed to the satisfaction of the building official, shall conform to the specifications and methods of design of accepted engineering practice or the approved rules in the absence of applicable standards.
1706 A .2 New materials. For materials that are not specifically provided for in this code, the design strengths and permissible stresses shall be established by tests as provided for in Section 1707 A .
SECTION 1707 A —ALTERNATIVE TEST PROCEDURE
1707 A .1 General. In the absence of approved rules or other approved standards, the building official shall make, or cause to be made, the necessary tests and investigations; or the building official shall accept duly authenticated reports from approved agencies in respect to the quality and manner of use of new materials or assemblies as provided for in Section 104.2.3. The cost of all tests and other investigations required under the provisions of this code shall be borne by the owner or the owner’s authorized agent.
SECTION 1708 A —IN-SITU LOAD TESTS
1708 A .1 General. Whenever there is a reasonable doubt as to the stability or load-bearing capacity of a completed building, structure or portion thereof for the expected loads, an engineering assessment shall be required. The engineering assessment shall involve either a structural analysis or an in-situ load test, or both. The structural analysis shall be based on actual material properties and other as-built conditions that affect stability or load-bearing capacity, and shall be conducted in accordance with the applicable design standard. The in-situ load tests shall be conducted in accordance with Section 1708 A .2. If the building, structure or portion thereof is found to have inadequate stability or load-bearing capacity for the expected loads, modifications to ensure structural adequacy or the removal of the inadequate construction shall be required.
1708 A .2 In-situ load tests. In-situ load tests shall be conducted in accordance with Section 1708 A .2.1 or 1708 A .2.2 and shall be supervised by a registered design professional. The test shall simulate the applicable loading conditions specified in Chapter 16 as necessary to address the concerns regarding structural stability of the building, structure or portion thereof.
1708 A .2.1 Load test procedure specified. Where a referenced material standard contains an applicable load test procedure and acceptance criteria, the test procedure and acceptance criteria in the standard shall apply. In the absence of specific load factors or acceptance criteria, the load factors and acceptance criteria in Section 1708 A .2.2 shall apply.
1708 A **.2.2 Load test procedure not specified.
Frequently asked questions
Do the CRSC chapters contain the detailed test procedures and strength values for these devices?
No. CHAPTER 12-16-1 and CHAPTER 12-16-2 name the applicable external standards (for example, ANSI/ASCE/SEI 25‑16, ASTM F2138, ANSI Z21.93/CSA 6.30) and require installations to follow the California Plumbing Code — the technical test methods and design values are in those external standards, not spelled out in the CRSC text § 12-16-101; § 12-16-201 .
If my device is certified to one of the named standards, can I install it myself?
Even if certified, the CRSC requires that installation of a customer‑owned device comply with the California Plumbing Code, as cited in § 12-16-101.1 and § 12-16-201.1. Follow the Plumbing Code and any local permitting requirements .
Where do I get the exact performance requirements?
Obtain the named standards: ANSI/ASCE/SEI 25‑16 for earthquake gas shutoff devices and ASTM F2138‑12(2017) or ANSI Z21.93‑2017/CSA 6.30‑2017 for residential excess flow valves (the CRSC points to these standards in § 12-16-101 and § 12-16-201) .
Does the CRSC allow EFVs above 5 psig?
The CRSC text specifically cites ANSI Z21.93‑2017/CSA 6.30‑2017 for “with Pressure up to 5 psig” in § 12-16-201. For pressures above that, the CRSC chapter does not provide authorization — you must consult the standard(s) and the Plumbing Code and confirm compliance with applicable rules .
Who enforces these CRSC requirements?
The CRSC entries state the Division of the State Architect uses the listed standards for certification in each chapter; local enforcement of installation requirements is handled through the California Plumbing Code and the local permitting/enforcement agency as applicable (§ 12-16-101; § 12-16-201; § 12-16-101.1; § 12-16-201.1) .
More in California Referenced Standards Code
- Administration and scope — CRSC Chapter 12 overview
- Air filter standards (Chapter 12‑71)
- Building and facility access / accessibility standards (Chapters 12‑11A, 12‑11B)
- Engineering regulations — quality and design of construction materials (12‑16 series)
- Exits and means of egress (Chapters 12‑10 series)
- Protective signaling systems and detectors (Chapters 12‑72‑1, ‑2, ‑3)
- Radiation shielding standards (Chapter 12‑31C)
- Referenced standards index / cross‑reference table (Part 12 listing of referenced standards)
- Releasing systems for security bars (egress-release standards)
- Standards for insulating materials (Chapter 12‑13)
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