The fire resistance of building materials includes the nature of building materials
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Flame retardant, oxygen index of 20 or more.
The burning performance of a building material refers to all physical and chemical changes that occur during combustion or fire, which is caused by the fire and flame propagation of the material surface, heat, smoke, carbonization, weight loss, and toxicity Produce and other characteristics to measure. China's national standard GB8624-97 will be the burning of building materials into the following grades. Class A: Noncombustible Building Materials B1 Grade: Flammable Building Materials Grade B2: Flammable Building Materials B3 Grade: Flammable Buildings Lawyers Unrestricted Karma Karma Stuck But Stem Material Section 2 Combustion Performance and Fire Resistance of Building Components limit
