BS 476-7：建筑材料和构件的防火测试.第7部分:测定产品火焰表面蔓延分类的测试方法
日期:2010-09-26 00:00
system based on the rate and extent of the spread of flame.
This standard provides data suitable for comparing the end-use performances of essentially flat materials, composites or assemblies, which are used primarily as the exposed surfaces of walls or ceilings.
Guidance to operators carrying out this method of test, the effect of thermal characteristics on the performance of assemblies, advice on the construction and preparation of test specimens, and information on the validation of this
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