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What is the difference between floor and roof boarding fire
Mar 04, 2018

The difference between floor board and roof board in fire fighting is mainly: the combustion performance of floor slab of three-level fire-rated building is non-flammable, and the fire resistance limit is not less than 0.75h; The combustion performance of roof bearing components is difficult to burn, and the fire resistance limit is not less than 0.5h. The combustion performance of the floor slab of the four-level fire-resistant grade building is required to be combustible, and the fire resistance limit is not less than 0.5h; The combustion performance of roof bearing components is difficult to burn, and the fire resistance limit is not less than 0.25h.


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