CRSC · California Referenced Standards Code
Which Building Code accessibility sections are commonly linked to detectable warning products?
California’s CRSC (§ 12‑11A.202 / § 12‑11B.202) requires detectable warning products to be independently evaluated and meet CCR Title 24 (CBC) dimensions and performance; products must be DSA/independent‑entity approved and recertified every two years, and installations must match Title 24 numeric rules (dome size, spacing, 36‑inch depths, color/contrast, placement) — check both CRSC product approval sections and CBC § 11B‑705/11B‑247 for the measurable requirements.
Last reviewed: July 6, 2026
What the code requires — plain English
Detectable warning products and directional surfaces installed in California must meet the product-approval and test-method requirements established in the California Referenced Standards Code. The CRSC scope and product-approval rule are set out in § 12-11A.202 and § 12-11B.202: these sections require that detectable warning products comply with the CCR (Title 24) specifications and be evaluated by an approved independent entity for use after January 1, 2001.
Detectable warning products must be approved and evaluated per the CRSC (12‑11A/12‑11B) and installed to the dimensions and performance rules in Title 24 (CBC 11B series).
Requirements in detail
Scope & controlling CRSC sections
- The CRSC defines the scope for product approval and test methods for detectable warnings in § 12-11A.202 and § 12-11B.202. These sections establish that the CRSC requirements and test methods apply to detectable warning products and directional surfaces.
Product approval and linkage to Title 24
- Detectable warning products must comply with Title 24 (California Code of Regulations, Part 2 / CBC accessibility provisions) as referenced by the CRSC (see product requirements in CRSC and the Title 24 sections such as § 11B-705 and § 11B-247). The CRSC explicitly directs compliance with CCR Title 24 for detectable warnings and directional surfaces.
Independent evaluation, certification, and recertification
- An independent entity (not-for-profit product safety testing and certification organization) must evaluate detectable warning products installed after January 1, 2001, to confirm they meet prescriptive and performance standards. This requirement appears in § 12-11A.205 and § 12-11B.205.
- Products must be recertified every two years (no exceptions) per § 12-11A.206 and § 12-11B.206.
Performance / uniformity requirements
- Detectable warning products and directional surfaces must ensure consistency and uniformity in: shape, color fastness, conformation, sound-on-cane acoustic quality, resilience, and attachment for at least five years; the CRSC references these requirements in § 12-11A.209 and § 12-11B.209.
- Significant degradation is defined (CRSC) as maintaining at least 90 percent of approved design characteristics (see § 12-11A.210 / § 12-11B.210).
Fees and administration
- The Division of the State Architect — Access Compliance may impose a manufacturer fee to cover program costs (see § 12-11A.207 / § 12-11B.207) and fees are deposited to the Disability Access Account (§ 12-11A.208 / § 12-11B.208).
Where the Title 24 (CBC) dimensions and installation rules come in
- The CRSC requires Title 24 compliance; for the measurable installation and product dimensions you must refer to CBC accessibility sections such as § 11B-705 (detectable warnings — dome size, spacing, color/contrast, placement and depths) and § 11B-247 (where detectable warnings are required). These CBC sections supply the numeric thresholds used in design/inspection.
Decision-relevant dimensions & values (quick reference table)
| Dimension / requirement | Typical value or rule | Code Reference |
|---|---|---|
| Product approval / independent-evaluation requirement | Required (CRSC link to Title 24; independent entity evaluation for products installed after 1/1/2001) | § 12-11A.202, § 12-11B.202 |
| Recertification interval | 2 years (recertify without exception) | § 12-11A.206, § 12-11B.206 |
| Consistency & performance (shape, color fastness, etc.) | Must ensure uniformity and not significantly degrade for 5 years | § 12-11A.209, § 12-11B.209 |
| Significant degradation definition | Maintain ≥ 90% of approved design characteristics | § 12-11A.210, § 12-11B.210 |
| Dome base diameter (truncated domes) | 0.9 in – 0.92 in | § 11B-705.1.1.1 |
| Dome top diameter | 0.45 in – 0.47 in | § 11B-705.1.1.1 |
| Dome height | 0.2 in (5.1 mm) | § 11B-705.1.1.1 |
| Dome center‑to‑center spacing (square grid) | 2.3 in – 2.4 in | § 11B-705.1.1.2 |
| Detectable surface color / contrast | Yellow (approx. FS 33538) OR ≥ 70% visual contrast with adjacent walking surface | § 11B-705.1.1.3.1, § 11B-705.1.1.3.2 |
| Curb ramp / crossing depth (typical) | 36 inches minimum in direction of travel (exceptions allow 24 inches in limited situations) | § 11B-705.1.2.2.1, § 11B-705.1.2.2.2 |
| Platform edge width | 24 inches (full length of boarding area) | § 11B-705.1.2.1 |
| Placement - edge to curb demarcation | Edge nearest curb 6 in min – 8 in max from demarcation line | § 11B-705.1.2.2.2 |
| Directional texture (transit) | Bars 0.1 in height tapering to 0.04 in; raised bars 0.2 in from surface; bar width 1.3 in; center‑to‑center 3 in; yellow color | § 11B-705.2 |
(See the CRSC for product approval rules and Title 24 (CBC) for numeric installation requirements.)
Exceptions & special cases
- The CRSC requires independent evaluation for products installed after 1/1/2001, but for residential housing the CRSC directs evaluation in consultation with the Department of Housing and Community Development (see § 12-11A.205 / § 12-11B.205).
- CBC (Title 24) contains a number of installation exceptions: for instance, detectable-warning depth may be reduced to 24 inches where it is technically infeasible to provide the normal turning space dimensions; existing installations may be permitted in-kind replacement for limited replacement percentages. See CBC sections § 11B-705.1.2 and related exceptions.
- Where the CRSC demands Title 24 compliance, project teams must read both the CRSC product/approval requirements and the corresponding CBC installation sections (11B‑705, 11B‑247, etc.) to determine whether an exception applies.
Common mistakes
- Installing non‑approved products or failing to verify DSA/independent‑entity approval (CRSC requires evaluation) — check § 12-11A.205 / § 12-11B.205.
- Relying on color alone when the product instead must meet 70% visual contrast when yellow is not used — see § 11B-705.1.1.3.1 / .3.2.
- Ignoring the 2‑year recertification requirement; manufacturers and installers must confirm current certification as required by § 12-11A.206 / § 12-11B.206.
- Incorrect dimensions or placement — common errors include insufficient depth (less than 36 in where required), wrong dome spacing/height, or placement outside the 6–8 in offset at parallel curb ramps. Verify CBC § 11B-705 details.
Worked example — curb ramp detectable warning (numbers)
Scenario: You are specifying detectable warnings for a new perpendicular curb ramp that connects a sidewalk to a street.
- The CBC requires detectable warning surfaces on perpendicular curb ramps to extend 36 inches in the direction of pedestrian travel and to extend the full width of the ramp run less 2 inches maximum on each side. Place the edge nearest the curb 6 in minimum and 8 in maximum from the curb demarcation line. (See § 11B-705.1.2.2.1 and § 11B-705.1.2.2.2.)
- Product approval steps required per CRSC: specify a DSA‑AC / independent‑entity evaluated detectable warning product and confirm the product’s current recertification (every 2 years) per § 12-11A.206 / § 12-11B.206.
- Choose a product whose truncated domes meet CBC geometric requirements (e.g., 0.2 in dome height, 2.3–2.4 in center spacing) and meet color/contrast rules (yellow or ≥ 70% contrast). Cite § 11B-705.1.1.1, § 11B-705.1.1.2, and § 11B-705.1.1.3 when verifying product performance.
Practical checks before acceptance: confirm (1) independent‑entity / DSA‑AC approval documentation that references CRSC/Title 24, (2) product recertification date (≤ 2 years), and (3) as‑built placement and dimensions match § 11B-705 installation rules.
Related provisions (CRSC & Title 24)
- CRSC: § 12-11A.202 / § 12-11B.202 — Scope / test-methods for detectable warnings.
- CRSC: § 12-11A.203 / § 12-11B.203 — Detectable warning products must comply with CCR Title 24.
- CRSC: § 12-11A.204 / § 12-11B.204 — Directional surfaces and Title 24 compliance.
- CRSC: § 12-11A.205 / § 12-11B.205 — Independent entity evaluation.
- CRSC: § 12-11A.206 / § 12-11B.206 — Two‑year recertification.
- CRSC: § 12-11A.209 / § 12-11B.209 — Consistency & uniformity (shape, color fastness, resilience, etc.).
- CBC (Title 24): § 11B-705 — Detectable warnings and directional texture (geometry, color/contrast, locations, placement).
- CBC (Title 24): § 11B-247 — Where detectable warnings and detectable directional texture are required.
(For design, procurement and inspection you must read both the CRSC product‑approval sections and the referenced Title 24/CBC sections together.)
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
DETECTABLE WARNING PRODUCTS
Sections 12-11A.203 and 12-11B.203. Must comply with the California Code of Regulations, Title 24.
DIRECTIONAL SURFACES
Sections 12-11A.204 and 12-11B.204. Must comply with the California Code of Regulations, Title 24.
INDEPENDENT ENTITY
Sections 12-11A.205 and 12-11B.205. Evaluation by an independent entity to confirm the prescriptive and performance standard of detectable warning products or direction surfaces installed after January 1, 2001. An independent entity is a not-for-profit product safety testing and certification organization, dedicated to testing for public safety. An independent entity would operate for the testing, certification and quality assessment of products, systems and services.
TWO-YEAR APPROVAL
Sections 12-11A.206 and 12-11B.206. Detectable warning products and directional surfaces are to be recertified every two years without exception or waiver.
FEE
Sections 12-11A.207 and 12-11B.207. The Division of the State Architect-Access Compliance may impose a fee on manufacturers of the specified products, to cover the cost of detectable warning products and directional surfaces.
DISABILITY ACCESS ACCOUNT
Sections 12-11A.208 and 12-11B.208. The fees received from manufacturers will be placed in the Disability Access Account.
DETECTABLE WARNING PRODUCTS AND DIRECTIONAL SURFACES
Sections 12-11A.209 and 12-11B.209. Detectable Warning Products and Directional Surfaces must ensure consistency and uniformity: (a) Shape, (b) Color fastness,
(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
CRSC § 11B-705.1.2.5 High relevance — show source text
11B-705.1.2.5 Blended transitions. Detectable warnings at blended transitions shall be 36 inches (914 mm) in depth and extend the entirety of the transition separating the walk or sidewalk from the vehicular way.
11B-705.1.2.6 Reflecting pools. When detectable warnings are provided at reflecting pools, it shall be 24 inches (610 mm) mini- mum and 36 inches (914 mm) maximum in width.
11B-705.1.2.7 Track crossings. Detectable warnings at track crossings shall be 36 inches (914 mm) in the direction of pedestrian travel and extend the full width of the circulation path.
11B-705.2 Detectable directional texture. Detectable directional texture at transit boarding platforms shall comply with Figure 11B-705.2 and shall be 0.1 inch (2.5 mm) in height that tapers off to 0.04 inch (1.0 mm), with bars raised 0.2 inch (5.1 mm) from the surface. The raised bars shall be 1.3 inches (33 mm) wide and 3 inches (76 mm) from center-to-center of each bar. This surface shall differ from adjoining walking surfaces in resiliency or sound-on-cane contact. The color shall be yellow and approximate FS 33538 of Federal Standard 595C. This surface will be placed directly behind the yellow detectable warning texture specified in Section 11B- 705.1.2.1, aligning with all doors of the transit vehicles where passengers will embark. The width of the directional texture shall be equal to the width of the transit vehicle’s door opening. The depth of the texture shall not be less than 36 inches (914 mm).
FIGURE 11B-705.2 — DETECTABLE DIRECTIONAL TEXTURE
11B-705.3 Product approval. Only approved DSA-AC detectable warning products and directional surfaces shall be installed as provided in the California Code of Regulations (CCR), Title 24, Part 1, Chapter 5, Articles 2, 3 and 4. Refer to CCR Title 24, Part 12, Chapter 11B, Section 12-11B.205 for building and facility access specifications for product approval for detectable warning products and direc- tional surfaces.
SECTION 11B- 706 — ASSISTIVE LISTENING SYSTEMS
11B- 706.1 General. Assistive listening systems required in assembly areas, conference and meeting rooms shall comply with Section 11B- 706 .
11B- 706.2 Receiver jacks. Receivers required for use with an assistive listening system shall include a [1] / 8 inch (3.2 mm) standard mono jack.
11B- 706.3 Receiver hearing-aid compatibility. Receivers required to be hearing-aid compatible shall interface with telecoils in hearing aids through the provision of neckloops.
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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 § 11B-705.2 High relevance — show source text
The depth of the texture shall not be less than 36 inches (914 mm)._
FIGURE 11B-705.2 — DETECTABLE DIRECTIONAL TEXTURE
11B-705.3 Product approval. Only approved DSA-AC detectable warning products and directional surfaces shall be installed as provided in the California Code of Regulations (CCR), Title 24, Part 1, Chapter 5, Articles 2, 3 and 4. Refer to CCR Title 24, Part 12, Chapter 11B, Section 12-11B.205 for building and facility access specifications for product approval for detectable warning products and direc- tional surfaces.
SECTION 11B- 706 — ASSISTIVE LISTENING SYSTEMS
11B- 706.1 General. Assistive listening systems required in assembly areas, conference and meeting rooms shall comply with Section 11B- 706 .
11B- 706.2 Receiver jacks. Receivers required for use with an assistive listening system shall include a [1] / 8 inch (3.2 mm) standard mono jack.
11B- 706.3 Receiver hearing-aid compatibility. Receivers required to be hearing-aid compatible shall interface with telecoils in hearing aids through the provision of neckloops.
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11B-706.4 Sound pressure level. Assistive listening systems shall be capable of providing a sound pressure level of 110 dB minimum and 118 dB maximum with a dynamic range on the volume control of 50 dB.
11B- 706.5 Signal-to-noise ratio. The signal-to-noise ratio for internally generated noise in assistive listening systems shall be 18 dB minimum.
11B- 706.6 Peak clipping level. Peak clipping shall not exceed 18 dB of clipping relative to the peaks of speech.
SECTION 11B- 707 — AUTOMATIC TELLER MACHINES, FARE MACHINES AND POINT-OF-SALE DEVICES
11B- 707.1 General. Automatic teller machines, fare machines and point-of-sale devices shall comply with Section 11B- 707 .
11B- 707.2 Clear floor or ground space. A clear floor or ground space complying with Section 11B- 305 shall be provided.
Exception: Clear floor or ground space shall not be required at drive-up only automatic teller machines and fare machines.
11B- 707.3 Operable parts. Operable parts shall comply with Section 11B- 309. Unless a clear or correct key is provided, each operable part shall be able to be differentiated by sound or touch, without activation.
Exceptions: 1. Drive-up only automatic teller machines and fare machines shall not be required to comply with Sections 11B- 309.2 and 11B- 309.3.
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,
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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 § 12-10 High relevance — show source text
(f) Release bar deformation. The cross-bar on a 36-inch (914 mm) wide door shall not be permanently set or deformed in excess of [1] / 4 inch (6 mm), by the test; a spacing of at least 1 inch (25 mm) is to be provided and maintained between the cross-bar and the face of the door when the horizontal force is applied against the cross-bar.
MARKING
Sec. 12-10-306. The listee’s name (or approved symbol), type or model designation shall be plainly marked on the releasing assembly. Devices and assemblies which are not listed by an approved listing agency for the intended purpose shall bear a label or other identifying markings as approved by the State Fire Marshal.
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CHAPTERS
12-11A and 11B BUILDING AND FACILITY ACCESS SPECIFICATIONS
Detectable warning products and directional surfaces installed after January 1, 2001, shall be evaluated by an independent entity, selected by the Department of General Services, Division of the State Architect-Access Compliance, for all occupancies, including transportation and other outdoor environments, except that when products and surfaces are for use in residential housing evaluation shall be in consultation with the Department of Housing and Community Development. See Government Code Section 4460.
PRODUCT APPROVAL FOR DETECTABLE WARNING PRODUCTS AND DIRECTIONAL SURFACES
SCOPE
Sections 12-11A.202 and 12-11B.202. These requirements and test methods apply to detectable warning products and directional surfaces.
DETECTABLE WARNING PRODUCTS
Sections 12-11A.203 and 12-11B.203. Must comply with the California Code of Regulations, Title 24.
DIRECTIONAL SURFACES
Sections 12-11A.204 and 12-11B.204. Must comply with the California Code of Regulations, Title 24.
INDEPENDENT ENTITY
Sections 12-11A.205 and 12-11B.205. Evaluation by an independent entity to confirm the prescriptive and performance standard of detectable warning products or direction surfaces installed after January 1, 2001. An independent entity is a not-for-profit product safety testing and certification organization, dedicated to testing for public safety. An independent entity would operate for the testing, certification and quality assessment of products, systems and services.
TWO-YEAR APPROVAL
Sections 12-11A.206 and 12-11B.206. Detectable warning products and directional surfaces are to be recertified every two years without exception or waiver.
FEE
Sections 12-11A.207 and 12-11B.207. The Division of the State Architect-Access Compliance may impose a fee on manufacturers of the specified products, to cover the cost of detectable warning products and directional surfaces.
DISABILITY ACCESS ACCOUNT
Sections 12-11A.208 and 12-11B.208. The fees received from manufacturers will be placed in the Disability Access Account.
DETECTABLE WARNING PRODUCTS AND DIRECTIONAL SURFACES
Sections 12-11A.209 and 12-11B.209. Detectable Warning Products and Directional Surfaces must ensure consistency and uniformity: (a) Shape, (b) Color fastness,
CRSC § 11B-109 High relevance — show source text
Exceptions:
1. Where it is technically infeasible to provide a minimum 108 inches (2743 mm) wide turning space, as measured perpendicular to the curb, the depth of detectable warnings may be reduced to 24 inches (610 mm) minimum.
2. Existing parallel curb ramps with detectable warnings in compliance with the code requirements in effect at the time of installation shall not be required to provide a minimum 36 inches (914 mm) wide portion of the turning space without detectable warnings.
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11B-705.1.2.3 Islands or cut-through medians. Detectable warnings at pedestrian islands or cut-through medians shall be 36 inches (914 mm) minimum in depth extending the full width of the pedestrian path or cut-through less 2 inches (51 mm) maximum on each side, placed at the edges of the pedestrian island or cut-through median, and shall be separated by 24 inches (610 mm) minimum of walking surface without detectable warnings.
Exception: Detectable warnings shall be 24 inches (610 mm) minimum in depth at pedestrian islands or cut-through medians that are less than 96 inches (2438 mm) in length in the direction of pedestrian travel.
11B-705.1.2.4 Bus stops. When detectable warnings are provided at bus stop boarding and alighting areas, the detectable warn- ings shall extend the full width of the boarding/alighting area and shall be 36 inches (914 mm) minimum in depth.
11B-705.1.2.5 Blended transitions. Detectable warnings at blended transitions shall be 36 inches (914 mm) in depth and extend the entirety of the transition separating the walk or sidewalk from the vehicular way.
11B-705.1.2.6 Reflecting pools. When detectable warnings are provided at reflecting pools, it shall be 24 inches (610 mm) mini- mum and 36 inches (914 mm) maximum in width.
11B-705.1.2.7 Track crossings. Detectable warnings at track crossings shall be 36 inches (914 mm) in the direction of pedestrian travel and extend the full width of the circulation path.
11B-705.2 Detectable directional texture. Detectable directional texture at transit boarding platforms shall comply with Figure 11B-705.2 and shall be 0.1 inch (2.5 mm) in height that tapers off to 0.04 inch (1.0 mm), with bars raised 0.2 inch (5.1 mm) from the surface. The raised bars shall be 1.3 inches (33 mm) wide and 3 inches (76 mm) from center-to-center of each bar. This surface shall differ from adjoining walking surfaces in resiliency or sound-on-cane contact. The color shall be yellow and approximate FS 33538 of Federal Standard 595C. This surface will be placed directly behind the yellow detectable warning texture specified in Section 11B- _705.1.2.1, aligning with all doors of the transit vehicles where passengers will embark.
CRSC § 11B-705.1.2.2.2 High relevance — show source text
11B-705.1.2.2.2 Parallel curb ramps. Detectable warnings at parallel curb ramps shall be located so the edge nearest the curb is 6 inches (152 mm) minimum and 8 inches (203 mm) maximum from the demarcation line at the face of the curb between the curb and the gutter, street or highway. Detectable warnings shall extend the full width of the turning space at the demarcation between the street and the sidewalk less 2 inches (51 mm) maximum on each side.
FIGURE 11B-705.1.2.2.2—PARALLEL CURB RAMPS
11B-705.1.2.2.2.1 One entrance/exit point. Where the turning space has one entrance/exit point other than the sloped ramp segments, detectable warnings shall be 36 inches (914 mm) deep, as measured perpendicular to the curb, and the turning space shall provide a minimum 36 inches (914 mm) wide portion without detectable warnings to allow pedestrian travel in the direction of the sidewalk without travelling over the detectable warnings.
Exceptions:
1. Where it is technically infeasible to provide a minimum 72 inches (1828 mm) wide turning space, as measured perpendicular to the curb, the depth of detectable warnings may be reduced to 24 inches (610 mm) minimum.
2. Existing parallel curb ramps with detectable warnings in compliance with the code requirements in effect at the time of installation shall not be required to provide a minimum 36 inches (914 mm) wide portion of the turning space without detectable warnings.
11B-705.1.2.2.2.2 Two entrance/exit points. Where the turning space has two entrance/exit points other than the sloped ramp segments, detectable warnings shall be 36 inches (914 mm) deep at both entrance/exit points, as measured perpen- dicular to the curb, and the turning space shall provide a minimum 36 inches (914 mm) wide portion without detectable warnings to allow pedestrian travel in the direction of the sidewalk without travelling over the detectable warnings.
Exceptions:
1. Where it is technically infeasible to provide a minimum 108 inches (2743 mm) wide turning space, as measured perpendicular to the curb, the depth of detectable warnings may be reduced to 24 inches (610 mm) minimum.
2. Existing parallel curb ramps with detectable warnings in compliance with the code requirements in effect at the time of installation shall not be required to provide a minimum 36 inches (914 mm) wide portion of the turning space without detectable warnings.
2025 CALIFORNIA BUILDING CODE 11B-109
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ACCESSIBILITY TO PUBLIC BUILDINGS, PUBLIC ACCOMMODATIONS, COMMERCIAL BUILDINGS AND PUBLIC HOUSING
11B-705.1.2.3 Islands or cut-through medians. Detectable warnings at pedestrian islands or cut-through medians shall be 36 inches (914 mm) minimum in depth extending the full width of the pedestrian path or cut-through less 2 inches (51 mm) maximum on each side, placed at the edges of the pedestrian island or cut-through median, and shall be separated by 24 inches (610 mm) minimum of walking surface without detectable warnings.
CRSC § 11B-705.1.1.4. High relevance — show source text
Exception: Detectable warning surfaces at curb ramps, islands or cut-through medians shall not be required to comply with Section 11B-705.1.1.4.
11B-108 2025 CALIFORNIA BUILDING CODE
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11B-705.1.2 Locations. Detectable warnings at the following locations shall comply with Section 11B-705.1.
11B-705.1.2.1 Platform edges. Detectable warning surfaces at platform boarding edges shall be 24 inches (610 mm) wide and shall extend the full length of the public use areas of the platform.
11B-705.1.2.2 Curb ramps. Detectable warnings at curb ramps shall comply with Section 11B-705.1.2.2.
11B-705.1.2.2.1 Perpendicular curb ramps. Detectable warnings at curb ramps shall extend 36 inches (914 mm) in the direc- tion of travel. Detectable warnings shall extend the full width of the ramp run less 2 inches (51 mm) maximum on each side, excluding any flared sides. Detectable warnings shall be located so the edge nearest the curb is 6 inches (152 mm) minimum and 8 inches (203 mm) maximum from the demarcation line at the face of the curb between the curb and the gutter, street or highway.
11B-705.1.2.2.2 Parallel curb ramps. Detectable warnings at parallel curb ramps shall be located so the edge nearest the curb is 6 inches (152 mm) minimum and 8 inches (203 mm) maximum from the demarcation line at the face of the curb between the curb and the gutter, street or highway. Detectable warnings shall extend the full width of the turning space at the demarcation between the street and the sidewalk less 2 inches (51 mm) maximum on each side.
FIGURE 11B-705.1.2.2.2—PARALLEL CURB RAMPS
11B-705.1.2.2.2.1 One entrance/exit point. Where the turning space has one entrance/exit point other than the sloped ramp segments, detectable warnings shall be 36 inches (914 mm) deep, as measured perpendicular to the curb, and the turning space shall provide a minimum 36 inches (914 mm) wide portion without detectable warnings to allow pedestrian travel in the direction of the sidewalk without travelling over the detectable warnings.
Exceptions:
1. Where it is technically infeasible to provide a minimum 72 inches (1828 mm) wide turning space, as measured perpendicular to the curb, the depth of detectable warnings may be reduced to 24 inches (610 mm) minimum.
2. Existing parallel curb ramps with detectable warnings in compliance with the code requirements in effect at the time of installation shall not be required to provide a minimum 36 inches (914 mm) wide portion of the turning space without detectable warnings.
CRSC § 11B-246.7 Medium relevance — show source text
11B-246.7 Trails and paths. Trails, paths and nature walk areas, or portions of them, shall be constructed with gradients permitting at least partial use by wheelchair occupants. Buildings and other functional areas shall be served by paths or walks with firm and stable surfaces.
11B-246.8 Nature trails. Nature trails and similar educational and informational areas shall be accessible to individuals with vision impairments by the provision of rope guidelines, raised Arabic numerals and symbols, or other similar guide and assistance devices.
SECTION 11B-247—DETECTABLE WARNINGS AND DETECTABLE DIRECTIONAL TEXTURE
11B-247.1 Detectable warnings.
11B-247.1.1 General. Detectable warnings shall be provided in accordance with Section 11B-247.1 and shall comply with Section 11B-705.1.
11B-247.1.2 Where required. Detectable warnings shall be provided where required by Section 11B-247.1.2.
11B-247.1.2.1 Platform edges. Platform boarding edges shall have detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.1.
11B-247.1.2.2 Curb ramps. Curb ramps shall have detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.2.
11B-247.1.2.3 Islands or cut-through medians. Islands or cut-through medians shall have detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.3.
11B-247.1.2.4 Bus stops. Where detectable warnings are provided at bus stop boarding and alighting areas in compliance with Section 11B-810.2.3, detectable warnings shall comply with Sections 11B-705.1.1 and 11B-705.1.2.4.
11B-247.1.2.5 Blended transitions. Blended transitions shall have detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.5.
11B-247.1.2.6 Reflecting pools. The edges of reflecting pools shall be protected by railings, walls, warning curbs or detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.6.
11B-247.1.2.7 Track crossings. Where it is necessary to cross tracks to reach transit boarding platforms, detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.7 shall be provided.
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11B-247.2 Detectable directional texture. At transit boarding platforms, the pedestrian access shall be identified with a detectable directional texture complying with Section 11B-705.2.
CRSC § 1.1.3.2 Medium relevance — show source text
Exceptions:
1. Replacement of less than 20 percent of existing detectable warnings at a single contiguous location shall be permit- ted to be in-kind at existing curb ramps, islands or cut-through medians with detectable warnings in compliance with the code requirements in effect at the time of installation.
2. Existing installed detectable warnings at curb ramps, islands or cut-through medians may comply with Section 11B- 705.1.1.3.2 in lieu of Section 11B-705.1.1.3.1.
11B-705.1.1.3.1 Detectable warning surfaces shall be yellow and approximate 33538 of SAE AMS-STD-595A.
11B-705.1.1.3.2 Detectable warning surfaces shall provide a 70 percent minimum visual contrast with adjacent walking surfaces. Contrast in percent shall be determined by:
Contrast percent = [(B1-B2)/B1] × 100 where
B1 = light reflectance value (LRV) of the lighter area and
B2 = light reflectance value (LRV) of the darker area.
Exception: Where the detectable warning surface does not provide a 70 percent minimum contrast with adjacent walking surfaces, a 1-inch (25 mm) wide minimum visually contrasting surface shall separate the detectable warning from adjacent walking surfaces. The visually contrasting surface shall contrast with both the detectable warning and adjacent walking surfaces, either light-on-dark or dark-on-light.
11B-705.1.1.4 Resiliency. Detectable warning surfaces shall differ from adjoining surfaces in resiliency or sound-on-cane contact.
Exception: Detectable warning surfaces at curb ramps, islands or cut-through medians shall not be required to comply with Section 11B-705.1.1.4.
11B-108 2025 CALIFORNIA BUILDING CODE
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11B-705.1.2 Locations. Detectable warnings at the following locations shall comply with Section 11B-705.1.
11B-705.1.2.1 Platform edges. Detectable warning surfaces at platform boarding edges shall be 24 inches (610 mm) wide and shall extend the full length of the public use areas of the platform.
11B-705.1.2.2 Curb ramps. Detectable warnings at curb ramps shall comply with Section 11B-705.1.2.2.
11B-705.1.2.2.1 Perpendicular curb ramps. Detectable warnings at curb ramps shall extend 36 inches (914 mm) in the direc- tion of travel. Detectable warnings shall extend the full width of the ramp run less 2 inches (51 mm) maximum on each side, excluding any flared sides. Detectable warnings shall be located so the edge nearest the curb is 6 inches (152 mm) minimum and 8 inches (203 mm) maximum from the demarcation line at the face of the curb between the curb and the gutter, street or highway.
CRSC § 1009.5 Medium relevance — show source text
Platform lift 1009.5 Required 1009.1 Signage 1009.9, 1009.11, 3002.3 Stairways 1009.3 Accessory Occupancies As occupancy exceptions 303.1.2, 303.1.4, 305.1.1, 311.1.1, 312.1 Live/work units 508.5 Mixed occupancy buildings 508.2 Height 508.2.2 Occupancy classification 508.2.1 Separations 508.2.4 Unlimited area buildings 507.1.1 Accreditation Body 2303.1.1, 2303.1.9.1 Addition 101.4.7, D103.1 Means of egress 3301.4, 3310 Address Identification 502.1 Adjusted Construction Costs 11B-106.5, 11B-
202 .4 Administration Chapter 1, Divisions I and II
AAC Masonry 2103.1, 2108.1 Access Openings Attic 1209.2
Crawl space 1209.1 Doors 712.1.13.2 Fire damper 717.4 Fire department 402.7.5 Mechanical appliances 1209.3 Refuse/laundry chutes 713.13.3 Accessibility 1009, Chapter 11A, 11B Accessible means of egress 1009, 11B- 207
Accessible routes Chapter 11A, 11B- 206, Chapter 11B Division 4, 11B-402 Amusement rides 11B-234, 11B-1002 Application 1.9.1, Chapter 11B Division 1 Assembly 1009.1 Assembly areas 11B-221, 11B-802 Assistive listening systems 11B-219, 11B-706 Automatic teller machines, fare machines and point-of-sale devices 11B-220, 11B-707 Bathroom 1127A, 1134A, 11B-806.2.4, 11B-809.10 Benches 11B-903
Bus stops 11B-209 Changes in level 1111A, 1121A, 1131A, 11B-303 Clear floor or ground space Chapter 11A, 11B-305 Covered multifamily dwellings Chapter 11A Curb ramps, blended transitions and islands 1112A, 11B-406 Destination-oriented elevators
11B-206.6, 11B-411 Detectable warnings 1112A.9, 1116A.5, 11B-247, 11B-705 Detention and correctional
facilities 11B-232, 11B-807 Dimensions for adults and
children 11B-102
Frequently asked questions
What is the single most important action to be compliant?
Use only detectable warning products that are DSA‑AC / independently evaluated and currently recertified per the CRSC and install them to the numeric dimensions in Title 24; check recertification and approval documentation.
Do the CRSC sections give the dome sizes and spacing?
No — the CRSC sets product approval and evaluation rules (scope). The detailed dome geometry and installation dimensions are specified in Title 24 (CBC § 11B‑705).
How often must manufacturers recertify products?
Every 2 years without exception, per § 12-11A.206 / § 12-11B.206.
Can an existing detectable warning be partially replaced with a new product?
Yes — limited in‑kind replacements and small replacement percentages are permitted by CBC exceptions; review the CBC replacement exceptions and verify independent‑entity approval if the product is post‑2001.
If a product fades or changes acoustic quality, is that a code issue?
Yes — CRSC requires that detectable warning products ensure color fastness, sound‑on‑cane acoustic quality and resilience and not significantly degrade (≥ 90% retention) over the service life defined in the CRSC.
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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