Which statement best defines noncombustible material for NFPA 101 based on ASTM E136 testing?

• A. Any material that passes ASTM E136.
• B. Any material that passes NFPA 259.
• C. Any material that fails ASTM E136 but passes E84.
• D. Any material that is water resistant.

Answer: (A)

In NFPA 101, whether a material is considered noncombustible is determined by the material’s behavior in the ASTM E136 test. This test specifically assesses whether a material will ignite and sustain combustion under standardized high-temperature exposure. If the specimen does not ignite or continue to burn under the E136 conditions, it is classified as noncombustible for code purposes. That’s why the best choice is the one stating that any material that passes ASTM E136 is noncombustible.

The other tests don’t define noncombustibility for NFPA 101: NFPA 259 measures ignitability from direct flame but isn’t the NFPA 101 criterion for noncombustible; E84 evaluates flame spread on surfaces rather than the material’s ability to resist ignition in E136; and water resistance has no bearing on combustibility.