CRSC · California Referenced Standards Code
Scope and mandatory referenced standards
The CRSC lists the state-adopted technical standards, shows the scope and code sections that require them, and documents when those standards are mandatory.
Last reviewed: July 6, 2026
Overview
This part of the California Referenced Standards Code (CRSC) collects the state-adopted, mandatory technical standards and the scope statements that tell you where each standard applies. The CRSC organizes state standards by chapter and includes individual scope sections (for example, Sec. 12-16-101 §12-16-101 and Sec. 12-16-201 §12-16-201) that identify the specific national or consensus documents adopted for particular devices or materials, and where they must be used in Title 24 work.
You’ll also find referenced-standards tables and chapter listings that point to the exact sections of the building, residential, fire and other California codes that use each standard (the CRSC index and tables list chapters such as 12‑16 and 12‑31C). These listings are the authoritative source for which external standards are required by the California codes and where they apply.
Because referenced standards are incorporated into code provisions to the prescribed extent, they become part of the enforceable requirements for the scope identified — a relationship reflected throughout Title 24 and companion codes (for example, R102.4 in the California Residential Code explains how referenced standards are treated).
In this section
Code references
Grounded in the retrieved California Referenced Standards Code — click a citation to read the verbatim passage:
CRC § 2025 Medium relevance — show source text
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APPENDIX BH-2 2025 CALIFORNIA RESIDENTIAL CODE
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BH AUTOMATIC VEHICULAR GATES
The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.
User notes:
About this appendix: Appendix BH provides requirements for automatic vehicular gates, including a definition of and references to standards that regulate such gates.
SECTION BH101—GENERAL
BH101.1 General. The provisions of this appendix shall control the design and construction of automatic vehicular gates installed on the lot of a one- or two-family dwelling.
SECTION BH102—DEFINITION
BH102.1 General. The following term shall, for the purposes of this appendix, have the meaning shown herein.
VEHICULAR GATE. A gate that is intended for use at a vehicular entrance or exit to the lot of a one- or two-family dwelling, and that is not intended for use by pedestrian traffic.
SECTION BH103—AUTOMATIC VEHICULAR GATES
BH103.1 Vehicular gates intended for automation. Vehicular gates intended for automation shall be designed, constructed and installed to comply with the requirements of ASTM F2200.
BH103.2 Vehicular gate openers. Vehicular gate openers, where provided, shall be listed in accordance with UL 325.
SECTION BH104—REFERENCED STANDARDS
BH104.1 General. See Table BH104.1 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 BH104.1—REFERENCED STANDARDS Col2 Col3 STANDARD
ACRONYMSTANDARD NAME SECTIONS
HEREIN REFERENCEDASTM F2200—20 Standard Specification for Automated Vehicular Gate Construction BH103.1 UL 325—2017 Door, Drapery, Gate, Louver and
Window Operations and Systems—with Revisions through February 2020BH103.2 2025 CALIFORNIA RESIDENTIAL CODE APPENDIX BH-3
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CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE
APPENDIX BI – LIGHT STRAW-CLAY CONSTRUCTION
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
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
CRC § G115 Medium relevance — show source text
SECTION G115—REFERENCED STANDARDS
G115.1 General. See Table G115.1 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 G115.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED ASCE 24—14 Flood Resistant Design and Construction G104.1, G108.3, G108.4, G111.1, G112.1,
G112.5, G112.6, G112.7, G113.1, G114.4HUD 24 CFR Part 3285 (2008) Manufactured Home Construction and Safety Standards G102 CBC_—25_ California Building Code G103.2, G114.1, G114.3 CRC_—25_ California Residential Code G109.2, G109.4, G109.5 CEC_—25_ California Electrical Code G109.4, G114.6 APPENDIX G-8 2025 CALIFORNIA BUILDING CODE
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CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE
APPENDIX H – SIGNS
(Not adopted by state agencies)
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 2025 CALIFORNIA BUILDING CODE APPENDIX H-1
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H SIGNS
The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.
User notes:
CRSC § 5.2 Medium relevance — show source text
CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE
CHAPTER 5 – NONRESIDENTIAL MANDATORY MEASURES
DIVISION 5.2 – ENERGY EFFICIENCY
(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 OSHPD Col11 Col12 Col13 Col14 Col15 BSCC DPH AGR DWR CEC CA SL SLC Adopting agency BSC BSC-
CGSFM 1 2 1/AC AC SS 1 1R 2 3 4 5 5 5 5 5 5 5 5 5 Adopt entire CA chapter Adopt entire chapter as
amended (amended
sections listed below)Adopt only those sections that
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5 NONRESIDENTIAL MANDATORY MEASURES
DIVISION 5.2 – ENERGY EFFICIENCY
SECTION 5.201—GENERAL
5.201.1 Scope. California Energy Code . For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory building standards.
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CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE
CHAPTER 5 – NONRESIDENTIAL MANDATORY MEASURES
DIVISION 5.3 – WATER EFFICIENCY AND CONSERVATION
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
CRSC § 1009.12 Medium relevance — show source text
Emergency exit and panic hardware.
|SFM|Part 9, Section 1009.12| |Chapter 12-11A,
12-11B|Detectable warning products and directional
surfaces|DSA|Part 2, Sections 1112A.9, 1116A.5, 11B-247,
11B-406.5.12, 11B-705, 11B-810.5.2| |Chapter 12-12|Reserved||| |Chapter 12-13|Standards for insulating material|CA/SFM|Part 2.5, Section R302.10.1
Part 6, Section 110.8
Part 9, Section 720, Table 721.1(1)
Part 11, Section A5.504.4.8| |Chapter 12-16-1|California standard for earthquake-actuated
automatic gas shutoff systems|DSA|Part 2, Chapters 16 and 16A
Part 5, Section 1211.8| |Chapter 12-16-2|California standard for residential excess flow
actuated automatic gas shutoff valves|DSA|Part 5, Section 1209.1| |Chapter 12-31C|Radiation shielding|DPH|Part 2, Section 3102C| |Chapter 12-71|Air filters|SFM|Part 4, Sections 401.2, 509.2.3, 509.2.3.4
Part 6, Section 120.1| |Chapter 12-72-1|Protective signaling systems.
Standard test procedures.|SFM|| |Chapter 12-72-2|Protective signaling systems. Single-and
multiple-station fire alarm devices
mechanically operated type.|SFM|| |Chapter 12-72-3|Protective signaling systems. Smoke detectors,
combustion products type.|SFM||2025 CALIFORNIA REFERENCED STANDARDS CODE ix
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12-1 ADMINISTRATION
RESERVED
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12-3 RELEASING SYSTEMS FOR SECURITY BARS IN DWELLINGS
(This standard includes provisions of Underwriters Laboratories Subject 2326, Appendix B, dated December 17, 1999, reprinted with their permission.)
INTRODUCTION
SECTION 12-3-1—SCOPE
12-3-1.1 These requirements cover releasing systems for bars, grilles, mesh, glazing or other items intended to provide security at doors and windows required for emergency escape from dwelling units. When actuated by the occupant, the system allows the obstructions over the door or window to be moved so occupants can escape in the event of an emergency.
CRSC § 9-3 Medium relevance — show source text
Applicants must ensure that underground service-termination compartments or sections meet the following requirements.
A. The termination compartment covers must be removable, sealable, provided with two lifting handles, and limited to a maximum size of 9 square feet.
B. The cover panel can be sealed using two drilled stud-nut and wing-nut assemblies on opposite sides of the panel.
C. The minimum dimensions specified in Table 9-3, “Minimum Wall-Mounted Pull-Section Dimensions: Residential and Nonresidential, Single-Phase or Three-Phase,” on Page 9-13, are used when the service conduit enters the bottom of the termination compartment or termination enclosure and all load conductors exit above the terminals. When the service conduit enters from the side or back of the pull box, use the X dimensions from the closest portion of the conduit to the nearest termination bolt.
D. Applicants must not use wall-mounted service-termination and pull enclosures for three-phase, nonresidential installations rated 401 amps through 2,500 amps. See Table 9-4, “Minimum Pad-Mounted (Floor-Standing) Switchboard Pull-Section Dimensions: Residential and Nonresidential,
Single-Phase and Three-Phase,” on Page 9-13, and Section 10, Table 10 1,“Minimum Bottom-Fed Pull Section Dimensions,” on Page 10-27, for bottom-entry installation requirements. See Table 10-2, “Pull Section Dimensions (Minimums) Below Ground Level,” on Page 10-31, for side-entry or back-entry requirements.
E. A PG&E project coordinator is contacted when developing nonresidential, 401-amps-and-above services. Applicants must ensure that they meet PG&E’s requirements for underground service-termination pull boxes, which include the following:
Installing multiple sets of utility service cables.
Provide stacking provisions (i.e., bolts) to terminate cables in any three-phase installation that is 1,200 amps or greater.
Providing additional space (i.e., depth, width, and termination height), when required, in any section of switchboard, panel board, or other enclosure intended as a termination point for PG&E’s service cables. This additional space will provide the mandatory clearances between phases and grounded surfaces, as well as accommodate the installed service cables.
See Numbered Document 063928, “Methods and Requirements for Installing Non-Residential Underground Electric Services 0–600 Volts to Customer-Owned Facilities,” for the appropriate conduit and cable requirements to use when designing nonresidential service installations. This document is included in Appendix C, “Electric and Gas Engineering Documents.”
F. See additional requirements for pad-mounted switchboards in Section 10,
CRSC § 12-8 Medium relevance — show source text
(b) Materials intended for application to a wood surface are to be applied to a substrate made of 1 inch by 4 inches (25 mm by 101 mm) nominal “C” and better VG Douglas fir flooring (FSC 70 to 90) or to other species for which the surface burning characteristic is to be measured.
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GUIDE TO MOUNTING TECHNIQUES FOR WALL AND CEILING INTERIOR FINISH MATERIAL
(c) Coating materials intended for application to particular combustible surfaces, but not wood, are to be applied to the specific surface for which they are intended. The coating material and combustible material are to be attached to the substrate board as specified in Section 12-8-1B.1 (d).
(d) Coating materials intended only for field applications to nonflammable surfaces are to be applied to 0.5 in calcium silicate board.
WALL COVERING MATERIAL
Sec. 12-8-1B.6. Wall coverings such as vinyl coatings, wallpaper, etc., of various types are to be mounted on 0.625-inch (16 mm) gypsum wallboard or on the actual substrate to which they are to be applied, using the adhesive and application technique specified by the manufacturer.
FIGURE 12-8-1B-1—TYPICAL STEEL FRAME SUPPORT SYSTEM
FIGURE 12-8-1B-2—MATERIAL FASTENING TECHNIQUE
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GUIDE TO MOUNTING TECHNIQUES FOR WALL AND CEILING INTERIOR FINISH MATERIAL
FIGURE 12-8-1B-3—TYPICAL MOUNTING TECHNIQUE FOR RIGID WALL MATERIALS
Note: When required, additional fasteners may be used to hold up the specimen flush to the wall.
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GUIDE TO MOUNTING TECHNIQUES FOR WALL AND CEILING INTERIOR FINISH MATERIAL
FIGURE 12-8-1B-4—TYPICAL MOUNTING TECHNIQUE FOR FLEXIBLE WALL MATERIALS
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GUIDE TO MOUNTING TECHNIQUES FOR WALL AND CEILING INTERIOR FINISH MATERIAL
FIGURE 12-8-1B-5—TYPICAL MOUNTING TECHNIQUE FOR CEILING MATERIALS
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POWER-OPERATED EXIT DOORS
STANDARD 12-10-1
STATE FIRE MARSHAL
SCOPE
Sec. 12-10-100.
CRC § 3401 Medium relevance — show source text
Exception: Where approved by the building official, inspections of the production equipment, including 3D printer, and the fabrication process used in a single housing tract shall be conducted on the first building to be constructed, and on a selected number of subsequent buildings, where the same equipment, equipment operators and fabrication process are used on all buildings. The number of inspections to be performed shall be determined by the building official.
SECTION BM106—REFERENCED STANDARDS
BM106.1 General. See Table BM106.1 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 BM106.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED UL 3401—19 Outline of Investigation for 3D Printed Building Construction BM103.1, BM103.2, BM104.2,
BM104.3, BM104.4, BM105.1APPENDIX BM-4 2025 CALIFORNIA RESIDENTIAL CODE
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CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE
APPENDIX BN – EXTENDED PLATE WALL CONSTRUCTION
(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 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 5 5 5 5 5 5 5 5 Adopt entire chapter Adopt entire chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowChapter / Section 2025 CALIFORNIA RESIDENTIAL CODE APPENDIX BN-1
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BN EXTENDED PLATE WALL CONSTRUCTION
The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.
CRSC § 12-16 Medium relevance — show source text
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
Authority: Sections 102, 208 and 25811.
Reference: Sections 102, 208 and 436.5.
ALL HEALING ARTS X-RAY INSTALLATIONS
Sec. 12-31C-101. All radiation shielding barriers in rooms and enclosures housing radiation machines shall comply with the mandatory standards and appendices in Report No. 35, “Dental X-RAY Protection”; Report 49, “Structural Shielding Design and Evaluation for Medical use of X-rays and Gamma Rays of Energies up to 10 MeV”; and Report No. 51, “Radiation Protection Design Guidelines for 0.1-100 MeV Particle Accelerator Facilities.” Published by the National Council on Radiation Protection and Measurements, 7910 Woodmont Avenue, Bethesda, Maryland 20814.
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12-71 AIR FILTERS
STANDARD 12-71-1
STATE FIRE MARSHAL
DESCRIPTION OF TEST APPARATUS, METHOD AND CLASSIFICATION REQUIREMENTS FOR AIR FILTERS
Sec. 12-71-100.
(a) Test apparatus.
- The test duct, made of M.S. gage galvanized sheet metal reinforced with angle irons, is 21 inches square (13 548 mm [2] ) and 13 [1] / 2 feet (4114 mm) long.
CEC § M102 Medium relevance — show source text
M101.3 Establishment of tsunami design zone. Where applicable, the Tsunami Design Zone Map shall meet or exceed the inundation limit given by the ASCE 7 Tsunami Design Geodatabase .
M101.4 Planning of tsunami vertical evacuation refuge structures within the tsunami design zone. Tsunami Vertical Evacuation Refuge Structures located within a tsunami hazard design zone shall be planned, sited, and developed in general accordance with the planning criteria of the FEMA P646 guidelines.
Exception: These criteria shall not be considered mandatory for evaluation of existing buildings for evacuation planning
purposes.
SECTION M102—REFERENCED STANDARDS
M102.1 General. See Table M102.1 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 M102.1—REFERENCED STANDARDS Col2 Col3 STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED ASCE 7—22 Minimum Design Load and Associated Criteria for Buildings and Other Structures M101.2, M101.3 FEMA P646—12 Guidelines for Design of Structures for Vertical Evacuation from Tsunamis M101.4 APPENDIX M-2 2025 CALIFORNIA BUILDING CODE
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CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE
APPENDIX N – REPLICABLE BUILDINGS
(Not adopted by state agencies)
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 2025 CALIFORNIA BUILDING CODE APPENDIX N-1
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N REPLICABLE BUILDINGS
The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.
User notes:
CRSC § 1507.7.5 Medium relevance — show source text
1507.7.5
C472—20: Standard Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete
Table 2506.2
C473—2019: Standard Test Methods for Physical Testing of Gypsum Panel Products
Table 2506.2
C474—15(2020): Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
Table 2506.2
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REFERENCED STANDARDS
C475/C475M—2017: Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
Table 2506.2
C514—04(2020): Standard Specification for Nails for the Application of Gypsum Board Table 721.1(2), Table 721.1(3), Table 2506.2
C516—19: Specifications for Vermiculite Loose Fill Thermal Insulation
722.3.1.4, 722.4.1.1.3
C547—19: Specification for Mineral Fiber Pipe Insulation Table 721.1(2), Table 721.1(3)
C549—18: Specification for Perlite Loose Fill Insulation
722.3.1.4, 722.4.1.1.3
C552—22: Standard Specification for Cellular Glass Thermal Insulation
Table 1508.2
C557—2003(2017): Specification for Adhesives for Fastening Gypsum Wallboard to Wood Framing Table 2506.2, 2508.4
C578—19: Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation Table 1404.5.2.1, Table 1404.5.2.2, 1404.5.3.1, Table 1404.5.3.2, Table 1508.2, 2603.10
C587—2004(2018): Specification for Gypsum Veneer Plaster
Table 2507.2
C595/C595M—21: Specification for Blended Hydraulic Cements 1909.2.2, 1910A.1, Table 2507.2
C618—23e1: Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
1909.2.2, 1910A.1
C631—2020: Standard Specification for Bonding Compounds for Interior Gypsum Plastering
Table 2507.2
C635/C635M—2017: Specification for the Manufacture, Performance and Testing of Metal Suspension Systems for Acoustical Tile and Lay-In Panel Ceilings
2506.2.1
C635/C635M— 22 : Standard Specification for the Manufacture, Performance and Testing of Metal Suspension Systems for Acoustical Tile and Lay-In Panel Ceilings
2506.2.1, 1617A.1.21
C636/C636M—19: Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels
808.1.1.1, 1617.11.16, 1617A.1.21
C652—21: Specification for Hollow Brick (Hollow Masonry Units Made from Clay or Shale)
CRSC § 25.4 Medium relevance — show source text
6)|100|12|12|14|16|19|21|26|30|35|16|18|21|24|26|29|34|39|45| |ASTM D1863
(No. 6)|150|12|14|17|19|22|24|29|34|39|18|21|23|26|29|32|37|43|48| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Parapet height is measured vertically from the top surface of the coping down to the surface of the roof covering in the field of the roof adjacent to the parapet and outbound
of any cant strip.
b. Interpolation shall be permitted for wind speed, mean roof height and parapet height. Extrapolation is not permitted.
c. Basic wind speed,V, and wind exposure shall be determined in accordance with Section 1609.
d. Where the minimum required parapet height is indicated to be 2 inches (51 mm), a gravel stop shall be permitted and shall extend not less than 2 inches (51 mm) from the roof
surface and not less than the height of the aggregate.
e. The tabulated values apply only to conditions where the topographic factor (Kzt) determined in accordance with Chapter 26 of ASCE 7 is 1.0 or where_Kzt_ is incorporated in the
basic wind speed in Section 1609.
f. For Exposure D, add 8 inches (203 mm) to the parapet height required for Exposure C and the parapet height shall not be less than 12 inches (305 mm).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Parapet height is measured vertically from the top surface of the coping down to the surface of the roof covering in the field of the roof adjacent to the parapet and outbound
of any cant strip.
b. Interpolation shall be permitted for wind speed, mean roof height and parapet height. Extrapolation is not permitted.
c. Basic wind speed,V, and wind exposure shall be determined in accordance with Section 1609.
d. Where the minimum required parapet height is indicated to be 2 inches (51 mm), a gravel stop shall be permitted and shall extend not less than 2 inches (51 mm) from the roof
surface and not less than the height of the aggregate.
e. The tabulated values apply only to conditions where the topographic factor (Kzt) determined in accordance with Chapter 26 of ASCE 7 is 1.0 or where_Kzt_ is incorporated in the
basic wind speed in Section 1609.
f. For Exposure D, add 8 inches (203 mm) to the parapet height required for Exposure C and the parapet height shall not be less than 12 inches (305 mm).|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
a. Parapet height is measured vertically from the top surface of the coping down to the surface of the roof covering in the field of the roof adjacent to the parapet and outbound
of any cant strip.
b. Interpolation shall be permitted for wind speed, mean roof height and parapet height.
Frequently asked questions
When does a referenced standard become mandatory?
A referenced standard is mandatory when the CRSC (or a Title 24 code chapter) explicitly adopts it for a specified application or device and links it to a code section; see the CRSC scope sections such as Sec. 12-16-101 (§12-16-101) and the chapter reference tables for adopted standards.
Where can I find the exact scope for a particular standard?
Look up the CRSC chapter for the subject (for example, the earthquake-actuated gas shutoff standard in Sec. 12-16-101 §12-16-101 or radiation shielding in Sec. 12-31C-101 §12-31C-101) and the corresponding tables that list which code sections reference the standard.
What if a referenced standard conflicts with a California code provision?
California code provisions take precedence where the code and an incorporated standard overlap or conflict; this hierarchy is explained in the California code framework (see, for example, R102.4 on referenced codes and standards).
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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