Incombustible

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Incombustible

Material that does not burn in a standard test in a furnace.

noncombustible

1. In building construction a material of which no part will ignite and burn when subjected to fire.
2. A building material having a structural base of noncombustible material, as defined above, with surfacing not over ? in. (0.32 cm) which has a flame-spread rating not higher than 50.
3. A material, other than those falling into the above two categories, which has a flame-spread rating not higher than 25 and which shows no evidence of continued progressive combustion.
References in periodicals archive ?
Incombustibility of fire-retardant paint-coated wood panels.
This will be followed by a focus on cell structure and raw materials in water blown foams as important factors for foam strength and incombustibility. The session will wrap up with an analysis of the evolution of 365mfc and blends in PIR foams to provide optimum performance with an assessment of future potential in Europe and the U.S.
The method of manufacturing incombustible wood includes performing plural times of individual drying steps for drying wood (for example, board material B), decompression steps for decompressing the wood, decompression impregnation steps for impregnating the wood with an incombustibility treatment agent in a decompressed state, and compression impregnation steps for impregnating the wood with the incombustibility treatment agent in a compressed state, wherein two times of the individual decompression steps, individual decompression impregnation steps, and compression impregnation steps are performed, and three times of the drying steps are performed.