CWUIC · California Wildland-Urban Interface Code
Which surface‑burning tests (tunnel/30‑min) are used by the CWUIC?
The CWUIC points to the 30‑minute extended tunnel test (ASTM E2768) for extended surface‑burning evaluation under § 503.2.4, uses UL‑723/ASTM E84 where the classic tunnel classification is referenced in § 202, and requires calorimetry (ASTM E1354) when heat‑release metrics are called for (see § 503.2.4.3.2). The code references SFM decking procedures (with HRR acceptance) for specific assemblies; check the controlling § to know which standard to run.
Last reviewed: July 6, 2026
What the code requires
The California Wildland‑Urban Interface Code (CWUIC) references the standard test method ASTM E2768 — Extended Duration Surface Burning Characteristics (30‑minute tunnel test) for extended surface‑burning evaluation under § 503.2.4. The code also references the classic surface‑burning tunnel method (UL 723 / ASTM E84) and other test standards for heat‑release / combustibility where those measurements are required (§ 202, § 501.4.1, § 503.2.4.3.2).
The single most important rule: the CWUIC points you to the 30‑minute tunnel method (ASTM E2768) for extended surface‑burning testing and to calorimetry (ASTM E1354) where heat‑release information is required.
Requirements in detail
Which test standards are cited by the CWUIC
| Test standard (name) | Test type / duration | Purpose ( decision‑relevant ) | Code Reference |
|---|---|---|---|
| ASTM E2768 — Extended Duration Surface Burning Characteristics | 30‑minute tunnel (extended‑duration) | Evaluates extended surface burning behavior of materials (longer exposure than standard Steiner tunnel) | § 503.2.4 |
| UL 723 / ASTM E84 — Surface Burning Characteristics (Steiner tunnel) | Tunnel (standard surface‑burning test) | Classic surface‑burning index (flame spread / smoke) used widely for classification | § 202, § 503.2.4 |
| ASTM E1354 — Oxygen‑consumption calorimetry | Lab calorimeter test (heat release rate measured) | Required where the code or referenced standards require heat‑release (HRR) or effective net peak HRR measurements | § 503.2.4.3.2 |
| (Supplemental / application‑specific) SFM standards — e.g., SFM 12‑7A‑4 (Decking) | Multiple parts (under‑deck burner + wind‑driven brand exposure) | Sets HRR and sustained combustion acceptance for decking assemblies; uses calorimetry and brand tests | See § 504 cross‑references (decking standards referenced by CWUIC) |
Notes:
- The CWUIC’s references to these standards appear in the document's referenced‑standards list and in the material/assembly test requirements. The direct citation linking ASTM E2768 to § 503.2.4 is explicit in the CWUIC referenced standards.
- Where the code requires heat‑release data rather than only flame‑spread/smoke, it points to calorimetry (ASTM E1354) via section § 503.2.4.3.2.
How CWUIC uses tunnel vs. calorimeter methods
- Use the 30‑minute tunnel test (ASTM E2768) when the code or a referenced standard calls for an extended‑duration surface‑burning evaluation (explicit tie to § 503.2.4).
- Use UL 723 / ASTM E84 where the standard calls for the traditional surface‑burning classification, often referenced through the CWUIC definitions and referenced standards list (§ 202).
- Use ASTM E1354 (calorimetry) when the acceptance criteria are stated in terms of heat‑release rate (HRR) or effective net peak HRR (for example, decking Part A acceptance uses HRR thresholds in the SFM standard that the CWUIC references).
Exceptions & special cases
- Decking and certain exterior assembly tests are governed by SFM test procedures (SFM 12‑7A‑4 and variations). Those SFM procedures require calorimetry and brand/wind tests and set HRR‑based acceptance criteria (e.g., effective net peak HRR ≤ 25 kW/ft² for the SFM Part A deck HRR criterion). This is in the SFM referenced standards incorporated by the code — not in § 503.2.4 itself.
- The CWUIC references multiple standards (E2768, UL 723/ASTM E84, E1354, plus others). Which test to run depends on the specific CWUIC section or the referenced SFM/appendix method invoked by the authority having jurisdiction. The code text links the tests to sections rather than restating full acceptance tables.
- If a section requires heat‑release numbers or effective net peak HRR, the CWUIC points to calorimetry or SFM procedures — do not substitute an E84 number unless the section explicitly calls for the E84/UL‑723 classification.
If you need a numeric pass/fail from CWUIC for a specific application (e.g., siding vs. decking), the retrieved CWUIC snippets do not include a universal flame‑spread or smoke threshold for E2768 — those thresholds are in the referenced SFM standards or in the applying section (not in the snippets retrieved). I cannot invent a numeric pass/fail that the CWUIC text does not supply.
Common mistakes
- Confusing the two tunnel tests: treating ASTM E84 / UL 723 (classic Steiner tunnel) as equivalent to ASTM E2768 (30‑min extended). The CWUIC explicitly references E2768 for extended‑duration surface burning under § 503.2.4; use the standard the section cites.
- Omitting calorimetry when the referenced method or SFM criterion requires effective net peak HRR or other HRR metrics — the CWUIC points you to ASTM E1354 for that purpose (see § 503.2.4.3.2).
- Relying on manufacturer literature that cites an unrelated test standard (e.g., an E84 report) when the code section or local SFM requirement actually calls for E2768 or calorimetry. Always confirm the exact standard listed in the controlling §.
Worked example — decking / HRR calculation (concrete numbers)
This example uses the SFM decking procedure that the CWUIC references (SFM 12‑7A‑4), which combines a Part A calorimetry requirement with a Part B burning‑brand exposure. The code references the SFM method in its referenced standards.
Scenario:
- A decking material is tested in the SFM Part A heat‑release test. The test lab records a peak heat release rate (HRR) of 100 kW for the 3‑minute burner exposure period.
- Deck test specimen area = 4 ft² (net assembled deck surface area).
- Part A procedure requires calculation of effective net peak HRR during the first 5 minutes as: (peak HRR − 80 kW) / (deck surface area). The SFM Conditions of Acceptance require effective net peak HRR ≤ 25 kW/ft².
Calculation:
- Effective net peak HRR = (100 kW − 80 kW) / 4 ft² = 20 kW / 4 ft² = 5 kW/ft².
Conclusion:
- At 5 kW/ft², the specimen meets the SFM Part A HRR acceptance (≤ 25 kW/ft²) as cited in the SFM procedure referenced by the code. Note: this acceptance criterion comes from the SFM standard that CWUIC references for decking; it is not a generic CWUIC § 503.2.4 numeric requirement.
Related provisions
- § 202 — definitions and referenced surface‑burning standards (UL 723 / ASTM E84 referenced).
- § 501.4.1 — referenced standards for combustibility/combustion assessment (lists several test standards).
- § 503.2.4 — explicit reference to ASTM E2768 (30‑minute tunnel / extended surface‑burning test).
- § 503.2.4.3.2 — directs use of calorimetry standard references (ASTM E1354) where HRR is needed.
- SFM test methods referenced (e.g., SFM 12‑7A‑4 for decking) — used for specific assemblies (decking, eaves) and carry HRR/brand‑exposure acceptance criteria that CWUIC incorporates by reference.
Code references
Grounded in the retrieved California Wildland-Urban Interface Code — click a citation to read the verbatim passage:
CWUIC § 501.3 High relevance — show source text
501.3, 504.3, 504.3.1, 504.5, 504.7, 504.7.1
E136— 2024a : Standard Test Method for Assessing Combustibility of Materials Using a Vertical Tube Furnace at 750 Degrees C
501.4.1
E1354— 2023 : Standard Test Method for Heat and Visible Smoke Release Rates for Materials and Products Using an Oxygen Consumption Calorimeter
503.2.4.3.2, 503.2.4.3.3
E2632—2020: Standard Test Method for Evaluating the Under-Deck Fire Test Response of Deck Materials
504.7.3.2, 504.7.3.3, 504.7.3.3.1, 504.7.3.4
E2652—2022: Standard Test Method for Assessing Combustibility of Materials Using a Tube Furnace with a Cone-shaped Airflow Stabilizer, at 750°C
501.4.1
E2707—2022: Standard Test Method for Determining Fire Penetration of Exterior Wall Assemblies Using a Direct Flame Impingement Exposure
504.5, 504.9, 504.9.3
E2726/E2726M—2012a(2017): Standard Test Method for Evaluating the Fire Test Response of Deck Structures to Burning Brands
504.7.3.2, 504.7.3.3, 504.7.3.3.2
E2768—11(2018): Standard Test Method for Extended Duration Surface Burning Characteristics of Building Materials (30 min Tunnel Test)
503.2.4
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REFERENCED STANDARDS
E2886/E2886M—20: Standard Test Method for Evaluating the Ability of Exterior Vents to Resist the Entry of Embers and Direct Flame Impingement
504.10.1
E2957—2017 : Standard Test Method for Resistance to Wildfire Penetration of Eaves, Soffits and Other Projections
504.3, 504.7, 504.7.1, 504.7.2
G155—2021: Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials
504.9.2
ICC International Code Council, Inc., 200 Massachusetts Avenue, NW, Suite 250, Washington, DC 20001
CBC—2025: California Building Code
CWUIC § 504.9 High relevance — show source text
E2707—2022: Standard Test Method for Determining Fire Penetration of Exterior Wall Assemblies Using a Direct Flame Impingement Exposure
504.5, 504.9, 504.9.3
E2726/E2726M—2012a(2017): Standard Test Method for Evaluating the Fire Test Response of Deck Structures to Burning Brands
504.7.3.2, 504.7.3.3, 504.7.3.3.2
E2768—11(2018): Standard Test Method for Extended Duration Surface Burning Characteristics of Building Materials (30 min Tunnel Test)
503.2.4
2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE 7-3
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REFERENCED STANDARDS
E2886/E2886M—20: Standard Test Method for Evaluating the Ability of Exterior Vents to Resist the Entry of Embers and Direct Flame Impingement
504.10.1
E2957—2017 : Standard Test Method for Resistance to Wildfire Penetration of Eaves, Soffits and Other Projections
504.3, 504.7, 504.7.1, 504.7.2
G155—2021: Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials
504.9.2
ICC International Code Council, Inc., 200 Massachusetts Avenue, NW, Suite 250, Washington, DC 20001
CBC—2025: California Building Code
1.1.7.3.1, 1.11.2.1.2, 1.11.3.4, 1.11.6 – 1.11.10, 101.3.1, 102.8, 105.1, 105.3, 106.3, 202, 404.10.3, 501.1, 501.3, 503.1, 503.2.2, 503.2.3, 504.2.1.2, 504.3, 504.3.1, 504.5, 504.5.2, 504.6, 504.7, 504.7.3.2, 504.8, 504.11, 504.11.1
CEBC—2025: California Existing Building Code
1.11.3.4, 102.8, 201.3
CFC—2025: California Fire Code
1.11.3.4, 1.11.9, 1.11.10, 102.8, 105.1, 201.3, 202, 402.1.1, 402.1.2, 402.2.1, 402.2.2, 403.2.4, 404.2, 404.4, 404.5, 404.10.3, 606.1, 606.2
CRC—2025: California Residential Code
1.1.7.3.1, 102.8
NFPA National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471
CWUIC § 7.1. High relevance — show source text
- Procedure.
7.1. Ignition. Ignite the burner, controlling for a constant 80 ± 4 kW output. 7.2. Flame exposure. Continue the exposure for a 3-minute period. Extinguish the burner.
7.3. Continued combustion. Continue observation for an additional 40 minutes or until all combustion has ceased.
- Observations. Note physical changes of the deck boards during the test, including structural failure of any deck board, location of flaming and glowing ignition, and loss of material (i.e., flaming drops of particles falling from the deck). It is desirable to capture the entire test with a video recorder to allow review of the details of performance.
12-7A-4.7.4 Report. The report shall include a description of the deck board material and the time of any degradation (effective net peak heat release rate, structural failure, flaming drops or particles falling from the deck) during the test.
- Calculated rate of heat release. The effective net peak heat release rate (HRR) shall be calculated as follows: 1.1. During the first 5 minutes of the test (the 3 minutes during which the ignition source burner is operating and the immediately following 2 minutes) the effective net peak HRR of the test assembly shall be reported as: effective net peak HRR = (peak heat release rate – 80 kW) / (deck surface area). 1.2. During the remaining test duration the effective net peak heat release rate of the test assembly shall be reported as: effective net peak HRR = (peak heat release rate) / (deck surface area).
12-7A-4.7.5 Conditions of Acceptance. Should one of the three replicates fail to meet the Conditions of Acceptance, three additional tests may be run. All of the additional tests must meet the Conditions of Acceptance.
- Effective net peak heat release rate of less than or equal to 25 kW/ft [2] (269 kW/m [2] ).
- Absence of sustained flaming or glowing combustion of any kind at the conclusion of the 40-minute observation period.
- Absence of falling particles that are still burning when reaching the burner or floor.
12-7A-4.8 PART B. Burning brand exposure.
12-7A-4.8.1 Equipment.
- Wind tunnel. The wind tunnel shall have the capability of providing 12 mph (5.4 m/s) airflow over the deck assembly.
- Anemometer. Device for measuring airflow across the deck.
- Burner. Gas-fueled burner for brand ignition.
12-7A-4.8.2 Test system preparation. See Figure 2. The ASTM E108 “A” brand roof test apparatus is to be used, with the following modifications:
- Deck support. The deck shall be supported horizontally with the center 60 inches (150 mm) from the front opening of the wind tunnel and the joists parallel to the airflow and resting on two transverse metal supports. The top surfaces of these supports, no more than 3 inches (75 mm) wide, are at the same height as the floor of the wind tunnel.
- Fragments. Burning fragments shall be free to fall to the floor of the room.
12-7A-4.8.3 Conduct of tests.
- Number of tests. Conduct the test on three replicate assemblies.
- **Moisture content.
CWUIC § 12-7 High relevance — show source text
12-7A-4.8 PART B. Burning brand exposure.
12-7A-4.8.1 Equipment.
- Wind tunnel. The wind tunnel shall have the capability of providing 12 mph (5.4 m/s) airflow over the deck assembly.
- Anemometer. Device for measuring airflow across the deck.
- Burner. Gas-fueled burner for brand ignition.
12-7A-4.8.2 Test system preparation. See Figure 2. The ASTM E108 “A” brand roof test apparatus is to be used, with the following modifications:
- Deck support. The deck shall be supported horizontally with the center 60 inches (150 mm) from the front opening of the wind tunnel and the joists parallel to the airflow and resting on two transverse metal supports. The top surfaces of these supports, no more than 3 inches (75 mm) wide, are at the same height as the floor of the wind tunnel.
- Fragments. Burning fragments shall be free to fall to the floor of the room.
12-7A-4.8.3 Conduct of tests.
- Number of tests. Conduct the test on three replicate assemblies.
- Moisture content. Measure the moisture content of the wooden members of the assembly using a moisture meter (ASTM D4444).
- Procedure. Adhere to ASTM E108 “Standard Test Methods for Fire Tests of Roof Coverings” (burning brand test, “A” brand), with apparatus modified as described above in “Test system preparation” and the following procedure: 3.1. The air velocity shall be calibrated using the 60-inch (1.5 m) framework spacing, with a smooth noncombustible calibration deck at a 5-inch (127 mm) per 12-inch (305 mm) horizontal incline positioned 60 inches (1.5 m) from the front opening of the wind tunnel. All other measurement details shall be followed as specified in Sections 4.4.2, 4.4.3 and 4.4.4 of ASTM E108. Although ASTM E108 specifies calibration to be conducted with the 33-inch (840-mm) framework spacing used for the intermittent flame test set up, tests have shown that at the nominal 12 mph
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setting, there was not difference in measured velocity between the 33- and 60-inch (838 mm and 1524 mm) framework spacing. 3.2. Mount the test specimen at a zero horizontal incline positioned 60 inches (1.5 m) from the front opening of the wind tunnel.
3.3. Ignite the “A” brands as specified in Section 9.4 of ASTM E108 as reprinted here:
- Each 12- x 12-inch (300 x 300 mm) face for 30 seconds.
- Each 2.25- x 12-inch (57 x 300 mm) edge for 45 seconds.
- Each 12- x 12-inch (300 x 300 mm) face again for 30 seconds. 3.4. Center the burning brand laterally on the deck with the front edge 2.5 inches (64 mm) from the entering air edge of the deck.
CWUIC § 0.5 High relevance — show source text
** The horizontal airflow, measured at a horizontal distance of 20 inches (0.5 m) from the edge of the wall assembly, shall not exceed 1.64 ft/s (0.5 m/s). 3. Placement of test frame. Prior to testing, and without the test specimen in place, position the frame assembly under the exhaust hood and set the gas burner for the prescribed level of output. 4. Placement of specimen. Once the burner output is verified, position the specimen holder assembly at the desired test location under the collection hood.
- Test specimen. Insert the test specimen into the frame assembly, sealing all edges with ceramic wool.
- Ignition. Simultaneously ignite the gas burner and start the timer marking the beginning of the test. Control the burner to a constant 150 ± 8 kW output. Control the hood duct flow to collect all products of combustion.
- Flame exposure. Continue the flame exposure until flame penetration of the test specimen and sustained flaming on the unexposed side occurs or for a period of 10 minutes, then extinguish the burner.
- Observation. If sustained flaming on the unexposed side of the test specimen has not occurred, observe the unexposed side of the test specimen for an additional 60 minutes for evidence of sustained flaming or glowing combustion on the unexposed side. Terminate the observation prior to the completion of the 60-minute observation period if all evidence of flame, glow and smoke has disappeared.
Note: An infrared thermometer has been found to be useful to detect the increase of temperature on the unexposed side of the test assembly. 9. Documentation. Perform photographic and/or video documentation before, during and after each test.
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12-7A-1.10 Report. The report shall include the following:
Name and address of the testing laboratory.
Name and address of test sponsor.
Description of the test specimen including construction details of the wall system, including details of individual components (such as type, thickness and installation method of any sheathing) and the manufacturer’s installation details and limitations as applicable.
Number of specimens tested.
Description of weathering, as applicable.
Moisture content of hygroscopic elements of wall system construction at the time of testing.
Details of the burner verification, including heat supply rate.
Date of test, test identification number and date of report.
The test results shall include:
9.1. A notation of the time and location of sustained flaming on the unexposed side of the test specimen during the test, along with the sequence number of the test specimen. 9.2. A determination of the presence of glow on the unexposed side of the test specimen at the end of the 60-minute observation period. 9.3. Observations of the burning characteristics of the exposed surface of the test wall during and after the flame
exposure.
12-7A-1.11 Conditions of Acceptance. Should one of the three replicates fail to meet the Conditions of Acceptance, three additional tests may be run. All of the additional tests must meet the Conditions of Acceptance.
- Absence of flame penetration through the wall assembly at any time.
- Absence of evidence of glowing combustion on the interior surface of the assembly at the end of the 70-minute test.
CWUIC § 4.4.2 High relevance — show source text
All other measurement details shall be followed as specified in Sections 4.4.2, 4.4.3 and 4.4.4 of ASTM E108. Although ASTM E108 specifies calibration to be conducted with the 33-inch (840-mm) framework spacing used for the intermittent flame test set up, tests have shown that at the nominal 12 mph
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MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE
setting, there was not difference in measured velocity between the 33- and 60-inch (838 mm and 1524 mm) framework spacing. 3.2. Mount the test specimen at a zero horizontal incline positioned 60 inches (1.5 m) from the front opening of the wind tunnel.
3.3. Ignite the “A” brands as specified in Section 9.4 of ASTM E108 as reprinted here:
- Each 12- x 12-inch (300 x 300 mm) face for 30 seconds.
- Each 2.25- x 12-inch (57 x 300 mm) edge for 45 seconds.
- Each 12- x 12-inch (300 x 300 mm) face again for 30 seconds. 3.4. Center the burning brand laterally on the deck with the front edge 2.5 inches (64 mm) from the entering air edge of the deck.
3.5. Continue the exposure for a 40-minute period or until all combustion of the deck boards ceases. The test shall be terminated immediately if flaming combustion accelerates uncontrollably (runaway combustion) or structural failure of any deck board occurs. Heat Release Rate is not monitored because of the impracticability with the specified airflow. 4. Observations. Note physical changes of the deck boards during the test, including deformation from the horizontal plane, location of flaming and glowing combustion, and loss of material (i.e., flaming drops of particles falling from the deck). It is desirable to capture the entire test with a video recorder to allow review of the details of performance.
12-7A-4.8.4 Report. The report shall include description of the deck board material, and the time of any degradation (accelerated combustion, board collapse, flaming drops or particles falling from the deck).
12-7A-4.8.5 Conditions of Acceptance. Should one of the three replicates fail to meet the Conditions of Acceptance, three additional tests may be run. All of the additional tests must meet the Conditions of Acceptance:
- Absence of sustained flaming or glowing combustion of any kind at the conclusion of the 40-minute observation period.
- Absence of falling particles that are still burning when reaching the burner or floor.
FIGURE 1 — DECK TEST ASSEMBLY (UNDER DECK-FLAME)
FIGURE 2 — DECK TEST ASSEMBLY (BURNING-BRAND)
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MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE
DECKING ALTERNATE METHOD A
SFM STANDARD 12-7A-4A
CWUIC § 12-7 High relevance — show source text
504.8
12-7A-3: Horizontal Projection Underside. A fire resistance test standard consisting of a 300 kW intensity direct flame exposure for a 10-minute duration
504.3, 504.7, 504.7.1
12-7A-4: Decking. A two-part test consisting of a heat release rate (Part A) deck assembly combustion test with an under deck exposure of 80 kW intensity direct flame for a 3-minute duration, and a (Part B) sustained deck assembly combustion test consisting of a deck upper surface burning ember exposure with a 12 mph wind for 40 minutes using a 2.2 lb (1kg) burning “Class A” size 12" × 12" × 2.25" (300 mm × 300 mm × 57 mm) roof test brand
504.7.3.2
12-7A-4A: Decking Alternate Method A. A heat release rate deck assembly combustion test with an under deck exposure of 80 kW intensity direct flame for a 3-minute duration
504.7.3.2
State Fire Marshal’s Guidelines for Fire Hydrant Markings Along State Highways and Freeways, May 1988
404.8
UL UL LLC, 333 Pfingsten Road, Northbrook, IL 60062-2096
9—2009: Fire Tests of Window Assemblies—with Revisions through March 2020
504.8
10B—2008: Fire Tests of Door Assemblies—with Revisions through May 2020
504.9
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REFERENCED STANDARDS
10C—2016: Positive Pressure Fire Tests of Door Assemblies—with Revisions through May 2021
504.9
94—2023: Tests for Flammability of Plastic Materials for Parts in Devices and Appliances
504.9.2
263—2011: Fire Tests of Building Construction and Materials—with Revisions through March 2022
501.3, 504.3, 504.3.1, 504.5, 504.7, 504.7.1
723—2018: Test for Surface Burning Characteristics of Building Materials
202, 501.4.1, 503.2.4, 504.7.3.2, 504.7.3.3
790— 2022 : Standard Test Methods for Fire Tests of Roof Coverings
504.2, 504.2.1.2, 504.11.6
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CALIFORNIA WILDLAND-URBAN INTERFACE CODE – MATRIX ADOPTION TABLE
APPENDIX A – GENERAL REQUIREMENTS
CWUIC § 709A.4 High relevance — show source text
E2726/E2726—12a: Standard Test Method for Evaluating the Fire-Test-Response of Deck Structures to Burning Brands
709A.3, 709A.4, 709A.4.2
E2751/E2751M—2017A: Practice for Design and Performance of Supported Laminated Glass Walkways
2409.1
E2768—11(2018): Standard Test Method for Extended Duration Surface Burning Characteristics of Building Materials (30 min Tunnel Test)
2303.2.1
E2837—2013(2017): Standard Test Method for Determining the Fire Resistance of Continuity Head-of-Wall Joint Systems Installed Between Rated Wall Assemblies and Nonrated Horizontal Assemblies
715.6
E2925—19a: Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function
2510.6.2
E3121—17: Standard Test Methods for Field Testing of Anchors in Concrete or Masonry
1901.3.4.3, 1910A.5.2, 1909.2.6.2, 1909.2.6.5, 1910A.5.5
F547—2017: Terminology of Nails for Use with Wood and Wood-Base Materials
Table 2506.2
F606/F606M—21: Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
2213.1, 2213A.1
F1292—99: Standard Specification for Impact Attenuation of Surface Systems Under and Around Playground Equipment
11B-1008.2.6.2
F1292—04: Standard Specification for Impact Attenuation of Surface Systems Under and Around Playground Equipment
11B-1008.2.6.2
F1487—01: Standard Consumer Safety Performance Specification for Playground Equipment for Public Use
202-USE ZONE
F1667—21a: Specification for Driven Fasteners: Nails, Spikes and Staples Table 721.1(2), Table 721.1(3), Table 1404.5.3.1, Table 1404.5.3.2, 1507.2.5, 1507.16.5, 2303.6, Table 2304.10.2, 2304.10.6, Table 2506.2
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REFERENCED STANDARDS
F1951—99: Standard Specification for Determination of Accessibility of Surface Systems Under and Around Playground Equipment:
11B-1008.2.6.1
F2006—21: Standard Safety Specification for Window Fall Prevention Devices for Non-emergency Escape (Egress) and Rescue (Ingress) Windows
1015.8
F2090—21: Specification for Window Fall Prevention Devices with Emergency Escape (Egress) Release Mechanisms
1015.8.1, 1015.8
F2200—2017: Standard Specification for Automated Vehicular Gate Construction
3110.2
CWUIC § 11.3.4 Medium relevance — show source text
CEBC—2025: California Existing Building Code
1.11.3.4, 102.8, 201.3
CFC—2025: California Fire Code
1.11.3.4, 1.11.9, 1.11.10, 102.8, 105.1, 201.3, 202, 402.1.1, 402.1.2, 402.2.1, 402.2.2, 403.2.4, 404.2, 404.4, 404.5, 404.10.3, 606.1, 606.2
CRC—2025: California Residential Code
1.1.7.3.1, 102.8
NFPA National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471
252—2022: Standard on Fire Test of Door Assemblies
504.9
257—2022: Standard on Fire Test for Window and Glass Block Assemblies
504.8
CEC—2025: California Electrical Code
201.3
SFM State of California, Department of Forestry and Fire Protection, Office of the State Fire Marshal, P.O. Box 944246, Sacramento, CA 94246-2460
12-7A-1: Exterior Wall Siding and Sheathing. A fire resistance test standard consisting of a 150 kW intensity direct flame exposure for a 10-minute duration
504.5, 504.9
12-7A-2: Exterior Windows. A fire resistance test standard consisting of a 150 kW intensity direct flame exposure for an 8-minute duration
504.8
12-7A-3: Horizontal Projection Underside. A fire resistance test standard consisting of a 300 kW intensity direct flame exposure for a 10-minute duration
504.3, 504.7, 504.7.1
12-7A-4: Decking. A two-part test consisting of a heat release rate (Part A) deck assembly combustion test with an under deck exposure of 80 kW intensity direct flame for a 3-minute duration, and a (Part B) sustained deck assembly combustion test consisting of a deck upper surface burning ember exposure with a 12 mph wind for 40 minutes using a 2.2 lb (1kg) burning “Class A” size 12" × 12" × 2.25" (300 mm × 300 mm × 57 mm) roof test brand
504.7.3.2
12-7A-4A: Decking Alternate Method A. A heat release rate deck assembly combustion test with an under deck exposure of 80 kW intensity direct flame for a 3-minute duration
504.7.3.2
State Fire Marshal’s Guidelines for Fire Hydrant Markings Along State Highways and Freeways, May 1988
404.8
UL UL LLC, 333 Pfingsten Road, Northbrook, IL 60062-2096
9—2009: Fire Tests of Window Assemblies—with Revisions through March 2020
CWUIC § 0.6 Medium relevance — show source text
D.|Column: 0.6″ minimum metal thickness;
protection: 11/2″ Portland cement plaster on
high ribbed metal lath,1/2″ broken air space.|—|3 hrs||1|||3| |C-11-CI-4|11″ O.D.|Column: 0.6″ minimum metal thickness;
protection: 2″ concrete other than siliceous
aggregate.|—|2 hrs
30 min||1|||21/2| |C-12-CI-5|12.5″
O.D.|Column: 7″ O.D. 0.6″ minimum metal thick-
ness; protection: 2″ porous hollow tile,3/4″
mortar between tile and column, outside
wire ties.|—|3 hrs||1|||3| |C-7-CI-6|7.6″ O.D.|Column: 7″ I.D.3/10″ minimum metal thick-
ness; concrete filled; unprotected.|—|30 min||1|||1/2| |C-8-CI-7|8.6″ O.D.|Column: 8″ I.D.3/10″ minimum metal thick-
ness; concrete filled reinforced with four
31/2″ ×3/8″ angles, in fill; unprotected
outside.|—|1 hr||1|||1|For SI: 1 inch = 25.4 mm.
RESOURCE A-76 2025 CALIFORNIA EXISTING BUILDING CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
NUMBER OF ASSEMBLIES
10
5
0
RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES
FIGURE 2.3
STEEL COLUMNS—GYPSUM ENCASEMENTS
Col1 The number in each box is
keyed to the last number in the
Item Code column in the Table.
For example:
C-SG-13
11 12
9 8
5 10 6
1 3 2 7 4 13Col3 Col4 Col5 Col6 Col7 Col8 Col9 Col10 Col11 Col12 Col13 Col14 Col15 Col16 Col17 11 11 11 11 12 12 12 12 12 12 12 12 9 9 9 9 8 8 8 8 8 8 8 8 5 5 10 10 6 6 6 6 6 6 6 6 1 1 3 2 2 7 7 4 4 4 13 13 13 13 13 0 1 2 3 4 5 6
7 8 9 10
FIRE-RESISTANCE RATING (HOURS)
CWUIC § 1407.2 Medium relevance — show source text
1407.2
E2570/E2570M—07(2019): Standard Test Methods for Evaluating Water-Resistive Barrier (WRB) Coatings Used under Exterior Insulation and Finish Systems (EIFS) or EIFS with Drainage
1407.4.1.1, 1705.17.1
E2573—19: Standard Practice for Specimen Preparation and Mounting of Site-fabricated Stretch Systems to Assess Surface Burning Characteristics
803.10
E2579—21: Standard Practice for Specimen Preparation and Mounting of Wood Products to Assess Surface Burning Characteristics
803.11
E2599—2018: Standard Practice for Specimen Preparation and Mounting of Reflective Insulation, Radiant Barrier and Vinyl Stretch Ceiling Materials for Building Applications to Assess Surface Burning Characteristics
2614.3
E2632/E2632M—13: Standard Test Method for Evaluating the Under-Deck Fire Test Response of Deck Materials
709A.3, 709A.4, 709A.4.1, 709A.5
E2634—2018: Standard Specification for Flat Wall Insulating Concrete Form (ICF) Systems
1903.3
E2652—18: Standard Test Method for Assessing Combustibility of Materials Using a Tube Furnace with a Cone-shaped Airflow Stabilizer, at 750 [o] C
703.3.1
E2707—15: Standard Test Method for Determining Fire Penetration of Exterior Wall Assemblies Using a Direct Flame Impingement Exposure
707A.3, 707A.3.1, 708A.3
E2726/E2726—12a: Standard Test Method for Evaluating the Fire-Test-Response of Deck Structures to Burning Brands
709A.3, 709A.4, 709A.4.2
E2751/E2751M—2017A: Practice for Design and Performance of Supported Laminated Glass Walkways
2409.1
E2768—11(2018): Standard Test Method for Extended Duration Surface Burning Characteristics of Building Materials (30 min Tunnel Test)
2303.2.1
E2837—2013(2017): Standard Test Method for Determining the Fire Resistance of Continuity Head-of-Wall Joint Systems Installed Between Rated Wall Assemblies and Nonrated Horizontal Assemblies
715.6
E2925—19a: Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function
2510.6.2
E3121—17: Standard Test Methods for Field Testing of Anchors in Concrete or Masonry
1901.3.4.3, 1910A.5.2, 1909.2.6.2, 1909.2.6.5, 1910A.5.5
F547—2017: Terminology of Nails for Use with Wood and Wood-Base Materials
Table 2506.2
F606/F606M—21: Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
2213.1, 2213A.1
CWUIC § 7-4 Medium relevance — show source text
7-4 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
REFERENCED STANDARDS
10C—2016: Positive Pressure Fire Tests of Door Assemblies—with Revisions through May 2021
504.9
94—2023: Tests for Flammability of Plastic Materials for Parts in Devices and Appliances
504.9.2
263—2011: Fire Tests of Building Construction and Materials—with Revisions through March 2022
501.3, 504.3, 504.3.1, 504.5, 504.7, 504.7.1
723—2018: Test for Surface Burning Characteristics of Building Materials
202, 501.4.1, 503.2.4, 504.7.3.2, 504.7.3.3
790— 2022 : Standard Test Methods for Fire Tests of Roof Coverings
504.2, 504.2.1.2, 504.11.6
2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE 7-5
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
7-6 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
CALIFORNIA WILDLAND-URBAN INTERFACE CODE – MATRIX ADOPTION TABLE
APPENDIX A – GENERAL REQUIREMENTS
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
(Not adopted by the State Fire Marshal)
Adopting Agency BSC BSC-
CGSFM Col5 HCD Col7 Col8 DSA Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC Adopting Agency BSC BSC-
CGT-24 T-19* 1 2 1/AC AC SS 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 below[California Code of Regulations,
Title 19, Division 1]Chapter / Section
Frequently asked questions
What is the single test I always run for surface burning under the CWUIC?
If the CWUIC section you are applying points to § 503.2.4, run the ASTM E2768 (30‑minute tunnel) extended‑duration surface burning test; if the section calls instead for classic surface‑burning classification, the referenced standard will be UL 723 / ASTM E84.
When do I need calorimetry (ASTM E1354) instead of a tunnel test?
When the code or an incorporated SFM procedure requires heat‑release metrics or effective net peak HRR, the CWUIC points you to calorimetry via § 503.2.4.3.2 (ASTM E1354).
Does ASTM E2768 replace ASTM E84 for all exterior materials?
No. ASTM E2768 is an extended‑duration tunnel method cited by § 503.2.4, but some provisions or jurisdictions may still require the traditional E84/UL‑723 classification (see § 202 and the referenced‑standards list). Always confirm which standard is named by the controlling §.
Are numeric pass/fail flame‑spread values in § 503.2.4?
The retrieved CWUIC snippets reference the test standards but do not contain a universal numeric flame‑spread pass/fail in § 503.2.4 itself. Numeric acceptance criteria are found in the applicable referenced standard or SFM procedure invoked by the specific CWUIC application (for example, decking SFM criteria).
If I have an E84 report, is that sufficient evidence for § 503.2.4?
Not necessarily. § 503.2.4 specifically cites E2768 for extended testing; use the exact standard the controlling section cites unless the authority having jurisdiction accepts an alternative.
More in California Wildland-Urban Interface Code
- Administration and Definitions
- Board of Appeals, Administration & Enforcement (permits, code official duties, appeals process)
- Wildland‑Urban Interface Area Designation & Mapping
- Fire Service Access & Water Supply (fire apparatus roads, driveways, hydrants, draft sites, standby power)
- Wildland‑Urban Interface Area Requirements (access, water, premises identification, key boxes)
- Referenced Standards & Test Methods
- Special Building Construction Regulations (ignition‑resistant construction, roof/vent/assembly requirements)
- Appendices and Model Ordinances (vegetation plans, severity‑zone adoption, home‑hardening guidance)
- Fire Protection Requirements (fire protection plans, systems, safety element provisions)
- Referenced California Documents & Matrix (CCR/Title 14 & 19 cross‑references, statutory references)
- Vegetation Management & Defensible Space (vegetation plans, maintenance, fire‑smart characteristics)
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