CRSC · California Referenced Standards Code

Standards for insulating materials (Chapter 12‑13)

Chapter 12‑13 of the CRSC sets testing, labeling, certification and enforcement rules to ensure insulation sold or installed in California meets declared thermal and safety standards.

Last reviewed: July 6, 2026

Overview

Chapter 12‑13 of the California Referenced Standards Code sets statewide quality, testing, labeling, and certification requirements for insulation sold or installed in California. It defines which products are covered (e.g., foil, cellular glass, cellulose, mineral fiber, polystyrene, polyurethane, polyisocyanurate, urea‑formaldehyde, vermiculite) and the basic scope and application rules in §12‑13‑1551.

The chapter establishes definitions and test methods (see §12‑13‑1552 and the Quality Standards at §12‑13‑1553) that manufacturers must follow when reporting thermal performance (R‑values, conductivity) and other product characteristics, including conditioning and test‑sample requirements. These provisions underpin product labeling and the tolerances allowed between measured and declared performance.

Chapter 12‑13 also prescribes manufacturer certification and identification procedures (§12‑13‑1555 and §12‑13‑1557), and authorizes inspections and independent performance testing by the Commission (§12‑13‑1558, §12‑13‑1559). These enforcement and information‑release rules support consumer protection, code compliance, and consistent energy performance across buildings.

In this section

Code references

Grounded in the retrieved California Referenced Standards Code — click a citation to read the verbatim passage:

  • CRSC § 12-11 High relevance — show source text

    (c) Conformation, (d) Sound-on-cane acoustic quality, (e) Resilience, and (f) Attachment will not degrade significantly for at least five years.

    SIGNIFICANT DEGRADATION

    Sections 12-11A.210 and 12-11B.210. Significant degradation means that the product maintains at least 90 percent of its approved design characteristics.

    SELECTION OF INDEPENDENT ENTITY

    Sections 12-11A.211 and 12-11B.211. The independent entity selected by the Division of the State Architect-Access Compliance shall be recognized as having appropriate expertise in determining whether products comply with the California Code of Regulations, Title 24.

    Authority: Government Code Sections 4450, 4460 and Health & Safety Code Section 18949.1.

    Reference: Government Code Section 4460.

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    12-13 STANDARDS FOR INSULATING MATERIAL

    (See Part 6, Title 24, CCR)

    DEPARTMENT OF CONSUMER AFFAIRS

    Bureau of Household Goods and Services

    ARTICLE 3. STANDARDS FOR INSULATING MATERIAL

    APPLICATION AND SCOPE

    Sec. 12-13-1551.

    (a) This article establishes standards governing the quality of insulation sold within the state after September 22, 1981, including those properties which affect the safety and thermal performance of insulation during application and in the use intended.

    (b) The provisions of this article shall apply only to the following types of insulating material:

    1. Aluminum foil (reflective foil);

    2. Cellular glass (board form);

    3. Cellulose fiber (loose fill and spray applied);

    4. Mineral aggregate (board form);

    5. Mineral fiber (blankets, board form, loose fill);

    6. Perlite (loose fill);

    7. Polystyrene (board form, molded and extruded);

    8. Polyurethane (board form and field applied);

    9. Polyisocyanurate (board form and field applied);

    10. Urea formaldehyde foam (field applied);

    11. Vermiculite (loose fill).

    (c) The provisions of this article shall apply to the sale of insulating material within the state. The provisions of this article shall not apply to insulating material manufactured in California, but sold outside the state, nor to insulating material manufactured outside California and sold wholesale in California for final retail sale outside the state. For the purpose of this article, the sale of a building or an appliance which contains installed insulating material is not considered the sale of the insulating material.

    (d) Any type of insulating material not listed in subsection (b) may be sold within California notwithstanding any other provision of this article.

    Authority: Sections 25920 and 25922, Public Resources Code.

    Reference: Sections 25910, 25920, 25921 and 25922, Public Resources Code.

  • CRSC § 12-13 High relevance — show source text

    ARTICLE 3. STANDARDS FOR INSULATING MATERIAL

    APPLICATION AND SCOPE

    Sec. 12-13-1551.

    (a) This article establishes standards governing the quality of insulation sold within the state after September 22, 1981, including those properties which affect the safety and thermal performance of insulation during application and in the use intended.

    (b) The provisions of this article shall apply only to the following types of insulating material:

    1. Aluminum foil (reflective foil);

    2. Cellular glass (board form);

    3. Cellulose fiber (loose fill and spray applied);

    4. Mineral aggregate (board form);

    5. Mineral fiber (blankets, board form, loose fill);

    6. Perlite (loose fill);

    7. Polystyrene (board form, molded and extruded);

    8. Polyurethane (board form and field applied);

    9. Polyisocyanurate (board form and field applied);

    10. Urea formaldehyde foam (field applied);

    11. Vermiculite (loose fill).

    (c) The provisions of this article shall apply to the sale of insulating material within the state. The provisions of this article shall not apply to insulating material manufactured in California, but sold outside the state, nor to insulating material manufactured outside California and sold wholesale in California for final retail sale outside the state. For the purpose of this article, the sale of a building or an appliance which contains installed insulating material is not considered the sale of the insulating material.

    (d) Any type of insulating material not listed in subsection (b) may be sold within California notwithstanding any other provision of this article.

    Authority: Sections 25920 and 25922, Public Resources Code.

    Reference: Sections 25910, 25920, 25921 and 25922, Public Resources Code.

    HISTORY:

    1. Repealer of Article 3 (Sections 1551-1561) filed 8-11-78; effective thirtieth day thereafter (Register 78, No. 32). For prior history, see Registers 76, No. 16; 78, Nos. 2 and 26.
    2. New Article 3 (Sections 1551-1565) filed 1-16-79; effective thirtieth day thereafter (Register 79, No. 3).
    3. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    DEFINITIONS

    Sec. 12-13-1552. For purposes of this article, the following definitions shall apply:

    (a) “Approved laboratory” means any testing facility including a facility owned or operated by a manufacturer which has been approved pursuant to Section 1554 of this article.

    (b) “ANSI” means the American National Standards Institute.

    (c) “ASTM” means ASTM International.

    (d) “Building materials” means materials used in walls, ceilings, roofs and floors of buildings.

    (e) “Exposed application” means any interior application of the product in which it is not used in a construction assembly imposing a material which meets the requirements of Chapter 8 of the California Building Code in substantial contact with the facing or membrane surface.

    (f) “Installed design density” means the proven density for loose fill insulation other than cellulose which has been determined by the manufacturer to constitute the density whereby settlement of no more than 2 percent shall occur over the first three years, or no more than 4 percent over the first 15 years of installation.

  • CRSC § 12-7 High relevance — show source text

    Fire tests of building
    construction and materials.|SFM|Part 2, Section 703| |Chapter 12-7-2|Reserved||| |Chapter 12-7-3|Fire-resistive standards.
    Fire testing furnaces.|SFM|Part 9, Section 3001| |Chapter 12-7-4|Fire-resistive standards.
    Fire door assembly tests.|SFM|Part 2, Section 716| |Chapter 12-7-5|Fire-resistive standards. Interior
    finish of decorative material.|SFM|Part 2, Chapter 8
    Part 9, Chapter 8| |Chapter 12-7A|Materials and construction methods for
    exterior wildfire exposure|SFM|Part 7, Chapter 5| |Chapter 12-8-1|Fire-resistive standards for fire protection|SFM|Part 2, Sections 408.14 and 435.6.2| |Appendix 12-8-1A|Calculation of the total rate of heat and carbon
    monoxide or carbon dioxide production|SFM|| |Appendix 12-8-1B|Guide to mounting techniques for wall and
    ceiling interior finish material|SFM|| |Chapter 12-10-1|Exits. Power-operated exit doors.|SFM|Part 2, Sections 408.4.2, 1010.1.4.2, 1010.1.9.1| |Chapter 12-10-2|Exits. Single-point latching or locking devices.|SFM|Part 2, Section 1010.2.2
    Part 9, Section 1010.2.2| |Chapter 12-10-3|Exits. 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.

  • CRSC § 25921.1 High relevance — show source text

    Reference: Sections 25921 and 25921.1, Public Resources Code.

    HISTORY:

    1. Amendment of subsections (a), (b) (4), (b) (6) and (f) filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    QUALITY ASSURANCE (RESERVED)

    Sec. 12-13-1556.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25921.1, Public Resources Code.

    HISTORY:

    1. Repealer filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    IDENTIFICATION

    Sec. 12-13-1557.

    (a) Except as specified in subsection (b), Item 3, of this section, no insulation shall be sold in California on or after September 22, 1981, unless the insulating material, container, bundle or similar packaging material bears a visible Commission approved statement certifying that a representative sample of the insulation material has been tested and approved by an approved laboratory and complies with the requirements of this article.

    (b) The Commission-approved statement shall consist of either:

    1. A design or statement approved by the Executive Director, or

    2. An identification of the manufacturer and any statement that the material meets the quality standards of the State of California.

    3. A statement that the material meets the quality standards of the State of California included in the bill of lading shall meet the requirements of this section only if the product is being shipped in bulk, or the container or product is not otherwise labeled by the manufacturer and the product is being sold to its ultimate user.

    (c) Any representation of thermal performance which appear on any label, literature, advertising or any other writing intended for the public shall be consistent with the certification testing results and derating required by this article.

    (d) Any insulation with facings and membranes for which the flame spread exceeds 25 when tested with facings and membranes exposed to the flame during the ANSI/ASTM E84-79 test must be clearly labeled with a statement that the product may be highly combustible if used in an exposed application. This subsection shall not apply to any product meeting the requirements of Sections 2602.1-2602.6 of the 1994 Uniform Building Code.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Section 25921, Public Resources Code.

    HISTORY:

    1. Amendment of subsections (a) and (c) filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    INSPECTIONS

    Sec. 12-13-1558.

    After September 22, 1981, the Commission may, upon the consent of the owner or lessee, or upon securing a search warrant, have access, during normal working hours, to the premises of manufacturers, distributors and retailers of insulating material sold for installation within the state for the purpose of determining compliance with the standards promulgated pursuant to Chapter 10.5 of the California Public Resources Code . Such access shall be for the purposes of obtaining representative samples of subject insulation and inspecting records and documents pertaining to tests by approved testing labs.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25926, Public Resources Code.

    HISTORY:

  • CRSC § 2602.1 High relevance — show source text

    (c) Any representation of thermal performance which appear on any label, literature, advertising or any other writing intended for the public shall be consistent with the certification testing results and derating required by this article.

    (d) Any insulation with facings and membranes for which the flame spread exceeds 25 when tested with facings and membranes exposed to the flame during the ANSI/ASTM E84-79 test must be clearly labeled with a statement that the product may be highly combustible if used in an exposed application. This subsection shall not apply to any product meeting the requirements of Sections 2602.1-2602.6 of the 1994 Uniform Building Code.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Section 25921, Public Resources Code.

    HISTORY:

    1. Amendment of subsections (a) and (c) filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    INSPECTIONS

    Sec. 12-13-1558.

    After September 22, 1981, the Commission may, upon the consent of the owner or lessee, or upon securing a search warrant, have access, during normal working hours, to the premises of manufacturers, distributors and retailers of insulating material sold for installation within the state for the purpose of determining compliance with the standards promulgated pursuant to Chapter 10.5 of the California Public Resources Code . Such access shall be for the purposes of obtaining representative samples of subject insulation and inspecting records and documents pertaining to tests by approved testing labs.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25926, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    PERFORMANCE TESTS

    Sec. 12-13-1559.

    The Commission may conduct, or may contract with others to conduct, independent performance tests of representative samples of insulation sold in the state to determine compliance with standards adopted pursuant to Chapter 10.5 of the California Public Resources Code . Such tests shall form the basis for instituting enforcement proceedings.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25926, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

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    STANDARDS FOR INSULATING MATERIAL

    COSTS OF INSPECTION AND TESTING (RESERVED)

    Sec. 12-13-1560.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25926, Public Resources Code.

    HISTORY:

    1. Repealer filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    ENFORCEMENT (RESERVED)

    Sec. 12-13-1561.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25931, Public Resources Code.

    HISTORY:

    1. Repealer filed 6-26-79; effective thirtieth day thereafter (Register 79, No. 26).

    RELEASE OF INFORMATION

  • CRSC § 1009.12 High 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||

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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 § 8-10 Medium relevance — show source text

    (b) Up to and including September 30, 1982, laboratories shall be approved either upon accreditation by the United States Department of Commerce National Voluntary Laboratory Accreditation Program or as stated in the preceding paragraph, at the manufacturer’s option. After September 30, 1982, laboratories shall only be approved upon accreditation by the United States Department of Commerce National Voluntary Laboratory Accreditation Program.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Sections 25915(a) and 25921, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81, designated effective 9-22-81 (Register 81, No. 33).

    CERTIFICATION

    Sec. 12-13-1555.

    (a) No insulating material shall be sold or installed in California on or after September 22, 1981, unless the manufacturer has certified that the material complies with the provisions of this article.

    (b) The manufacturer shall submit a certification statement to the Executive Director for each type of insulating material. Such statement shall contain the following information:

    1. Name of the manufacturer.

    2. A description of the type of insulating material being certified in sufficient detail to permit its identification. The description may include information sheets, brochures, a sample label for the product or similar information.

    3. Test results from an approved laboratory.

    4. A description of the basis for ensuring that all the insulating material of the type being certified complies with the requirements of this article. Such description shall include, but not be limited to a description of the frequency of testing of the material, the quality assurance program, and any third-party inspections or testing used by the manufacturer.

    5. A declaration that the insulating material complies with the requirements of this article.

    6. The wording of the certification seal, if such seal consists of a statement pursuant to Section 1557 (b) (2) of this article.

    (c) Every certification statement shall be dated and signed by the manufacturer attesting to its truth and accuracy. Where the manufacturer is either a corporation or a business association, the certification statement shall be dated, signed and attested to by a responsible official thereof.

    (d) Within 45 days after receipt of a certification statement, the Executive Director shall forward, to the manufacturer, an acknowledgment that the statement has been received and that it is complete and accurate on its face.

    (e) Certification of the insulation material shall be deemed to occur upon forwarding of the acknowledgement by the Executive Director. If acknowledgment is not forwarded in a timely manner, certification shall be deemed to occur on the 45th day after receipt of the certification statement.

    (f) The statement of test results required in the certification may be based upon tests conducted prior to the adoptive date of this article if: (1) the same test was conducted within two years of the date of adoption, (2) the laboratory at which the tests were

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    STANDARDS FOR INSULATING MATERIAL

    conducted has been approved for those tests as of the date of the certification statement, and (3) the laboratory certifies that the test and product are the same as the test and product referred to in the statement of test results.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Sections 25921 and 25921.1, Public Resources Code.

    HISTORY:

  • CRSC § 12-13 Medium relevance — show source text

    PERFORMANCE TESTS

    Sec. 12-13-1559.

    The Commission may conduct, or may contract with others to conduct, independent performance tests of representative samples of insulation sold in the state to determine compliance with standards adopted pursuant to Chapter 10.5 of the California Public Resources Code . Such tests shall form the basis for instituting enforcement proceedings.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25926, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

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    STANDARDS FOR INSULATING MATERIAL

    COSTS OF INSPECTION AND TESTING (RESERVED)

    Sec. 12-13-1560.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25926, Public Resources Code.

    HISTORY:

    1. Repealer filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    ENFORCEMENT (RESERVED)

    Sec. 12-13-1561.

    Authority: Section 25218 (e), Public Resources Code.

    Reference: Section 25931, Public Resources Code.

    HISTORY:

    1. Repealer filed 6-26-79; effective thirtieth day thereafter (Register 79, No. 26).

    RELEASE OF INFORMATION

    Sec. 12-13-1562.

    Persons submitting information to the Commission who wish information to be kept confidential shall comply with the provisions of Sections 2501-2511 of the Public Resources Code.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Sections 25223 and 25921.1, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    LIABILITY

    Sec. 12-13-1563.

    Nothing in this article shall be construed as imposing responsibility on manufacturers for misuse of properly labeled insulation.

    Authority: Section 25218(e), Public Resources Code.

    Reference: Sections 25926 and 25931, Public Resources Code.

    HISTORY:

    1. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    INSULATING EXISTING BUILDINGS

    Sec. 12-13-1564.

    (a) On or after March 25, 1982, if insulating material is installed in an existing building, in any of the applications specified in California Code of Regulations, Title 24, Part 6, Section 118, the installing contractor shall certify that the amount of insulation installed meets or exceeds the requirements of Part 6, Section 118 for that application. Such certification shall be made on completion of the installation by posting in a conspicuous location a certificate signed under penalty of perjury.

  • California Referenced Standards Code Medium relevance — show source text

    |100 psf|1 hr
    23 min|||7|1, 2|11/3| |F/C-4-RC-9|4″|4″ deep (4370 psi);1/4″ reinforcement bars
    at 6″ pitch with3/4″ cover;1/4″ main rein-
    forcement bars at 4″ pitch perpendicular
    with1/2″ cover; 13′1″ span restrained.|150 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-10|4″|4″ thick (5140 psi) deck;1/4″ reinforce-
    ment bars at 71/2″ pitch with7/8″ cover;3/8″
    main reinforcement bars at 33/4″ pitch
    perpendicular with1/2″ cover; 13′1″ span
    restrained.|140 psf|1 hr
    16 min|||7|1, 5|11/4| |F/C-4-RC-11|4″|4″ thick (4000 psi) concrete deck;
    3″ × 11/2″ × 4 lbs R.S.J.; 2′6″ C.R.S.; flush
    with top surface; 4″ × 6″ x 13 SWG mesh
    reinforcement 1″ from bottom of slab; 6′6″
    span restrained.|150 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-12|4″|4″ deep (2380 psi) concrete deck;
    3″ × 11/2″ × 4 lbs R.S.J.; 2′6″ C.R.S.; flush
    with top surface; 4″ × 6″ x 13 SWG mesh
    reinforcement 1″ from bottom surface;
    6′6″ span restrained.|150 psf|1 hr
    3 min|||7|1, 2|1| |F/C-4-RC-13|41/2″|41/2″ thick (5200 psi) deck;1/4″ reinforce-
    ment bars at 71/4″ pitch with7/8″ cover;3/8″
    main reinforcement bars at 33/4″ pitch
    perpendicular with1/2″ cover; 13′1″ span
    restrained.|140 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-14|41/2″|41/2″ deep (2525 psi) concrete deck;1/4″
    reinforcement bars at 71/2″ pitch with7/8″
    cover;3/8″ main reinforcement bars at
    33/8″ pitch perpendicular with1/2″ cover;
    13′1″ span restrained.|150 psf|42 min|||7|1, 5|2/3| |F/C-4-RC-15|41/2″|41/2″ deep (4830 psi) concrete deck;
    11/2″ × No.

  • CRSC § 0.027 Medium relevance — show source text

    B. 0.027-inch (0.7 mm) steel or 0.032-inch (0.8 mm) nonferrous metal for a hole having a 1 [3] / 8 -inch (35 mm) maximum dimension.

    1. A closure for a hole larger than 1 [3] / 8 -inch (35 mm) diameter shall have a thickness equal to that required for the enclosure of the device or a standard knockout seal shall be used. Such plates or plugs shall be securely mounted.

    2. A knockout in a sheet metal enclosure shall be reliably secured but shall be capable of being removed without undue deformation of the enclosure.

    3. A knockout shall be provided with a surrounding surface adequate for proper seating of a conduit bushing, and shall be so located that installation of a bushing at any knockout likely to be used during installation will not result in spacings between uninsulated live parts and the bushing of less than those indicated under spacings. The figures in parentheses are the galvanized sheet gage numbers (GSG) (for zinc-coated steel), the manufacturers’ standard gage numbers (MSG) (for uncoated steel), and the American wire gage numbers (AWG) (for a nonferrous metal) which provide the required minimum thickness of metal.

    4. An enclosure or parts of an enclosure of nonmetallic material shall have the mechanical strength and durability and be so formed that parts will be protected against damage. The mechanical strength of an enclosure shall be at least equivalent to a sheet metal enclosure of the minimum thickness specified in Table 12-72-3B. See Section 12-72-205 for performance tests on plastic materials and enclosures.

    5. (No requirements.)

    6. The continuity of the grounding system shall not rely on the dimensional integrity of the nonmetallic material.

    7. Ventilating openings in an enclosure, including perforated holes, louvers and openings protected by means of wire screening, expanded metal or perforated covers, shall be of such size or shape that no opening will permit passage of a rod having a diameter of 3 [3] / 64 inch (77 mm). An enclosure for fuses or other overload protective device and provided with ventilating openings shall afford adequate protection against the emission of flame or molten metal. The opening shall be designed to permit cleaning without damage to functional enclosed parts.

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    PROTECTIVE SIGNALING SYSTEMS

    1. Except as noted in the following paragraph, perforated sheet metal and sheet metal employed for expanded metal mesh shall be not less than 0.042 inch (1 mm) in average thickness, 0.046 inch (1.1 mm) if zinc coated.
    2. If the indentation of a guard or enclosure will not alter the clearance between uninsulated live parts and dead metal parts so as to affect performance adversely or reduce spacings below the minimum values given under spacings, 0.021 inch (0.5 mm) expanded metal mesh [0.024 inch (0.6 mm) if zinc coated] may be employed, provided that (1) the exposed mesh on any one side or surface of the device so protected has an area of not more than 72 square inches (46 451 mm [2] ) and has no dimension greater than 12 inches (305 mm), or (2) the width of an opening so protected is not greater than 3 [1] / 2 inches (89 mm).
  • CRSC § 1551-1561 Medium relevance — show source text

    HISTORY:

    1. Repealer of Article 3 (Sections 1551-1561) filed 8-11-78; effective thirtieth day thereafter (Register 78, No. 32). For prior history, see Registers 76, No. 16; 78, Nos. 2 and 26.
    2. New Article 3 (Sections 1551-1565) filed 1-16-79; effective thirtieth day thereafter (Register 79, No. 3).
    3. Amendment filed 8-10-81; designated effective 9-22-81 (Register 81, No. 33).

    DEFINITIONS

    Sec. 12-13-1552. For purposes of this article, the following definitions shall apply:

    (a) “Approved laboratory” means any testing facility including a facility owned or operated by a manufacturer which has been approved pursuant to Section 1554 of this article.

    (b) “ANSI” means the American National Standards Institute.

    (c) “ASTM” means ASTM International.

    (d) “Building materials” means materials used in walls, ceilings, roofs and floors of buildings.

    (e) “Exposed application” means any interior application of the product in which it is not used in a construction assembly imposing a material which meets the requirements of Chapter 8 of the California Building Code in substantial contact with the facing or membrane surface.

    (f) “Installed design density” means the proven density for loose fill insulation other than cellulose which has been determined by the manufacturer to constitute the density whereby settlement of no more than 2 percent shall occur over the first three years, or no more than 4 percent over the first 15 years of installation.

    (g) “Insulating material” or “insulation” means any material listed in Section 1551 (b) of this article and placed within or contiguous to a wall, ceiling, roof or floor of a room or building, or contiguous to the surface of any appliance or its intake or outtake mechanism, for the purpose of reducing heat transfer or reducing adverse temperature fluctuations of the building room or appliance.

    2025 CALIFORNIA REFERENCED STANDARDS CODE 89

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    STANDARDS FOR INSULATING MATERIAL

    (h) “Manufacturer” means any person who either:

    1. Produces insulating material in the final composition either for use in the form sold or to be further dimensionally modified; or
    2. In the case of polyurethane, polyisocyanurate and urea formaldehyde foam formed at the installation site, produces the primary components of the material.

    “Manufacturer” shall not include any building contractor or any other person whose sole activity is to install insulation at the installation site.

    (i) “Quality assurance program.” (Reserved)

    (j) “Recommended wall density” means the density used for pressure fill retrofit wall applications to prevent settling.

    (k) “Representative sample” means a sample of insulating material with the same characteristics (other than thickness) and using the same facing imposed on the insulating material manufactured for final use.

    (l) “Representative thickness” means a thickness of insulating material at which the change in thermal performance per inch will vary no more than plus or minus 2 percent with increases in thickness.

    (m) “TAPPI” means Technical Association of Pulp and Paper Industry.

  • CRSC § 12-7 Medium 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

Frequently asked questions

Which insulating products are covered by Chapter 12‑13?

Chapter 12‑13 lists the covered types in §12‑13‑1551(b) (aluminum foil, cellular glass, cellulose, mineral aggregate/fiber, perlite, polystyrene, polyurethane, polyisocyanurate, urea‑formaldehyde foam, vermiculite). Products not listed may still be sold, but the chapter’s testing and labeling rules specifically apply to the listed types.

What must manufacturers do to sell insulation in California?

Manufacturers must submit a certification statement with test results from an approved laboratory and describe their quality‑assurance basis (§12‑13‑1555). Packaged insulation must carry a Commission‑approved identification or certification statement on the label or shipping documents per §12‑13‑1557.

How does the state verify compliance?

The Commission may inspect manufacturers, distributors, and retailers to obtain samples and records (§12‑13‑1558) and may conduct or contract independent performance tests (§12‑13‑1559) to support enforcement actions.

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