NFPA 251 建筑结构和材料耐火试验方法标准
日期:2012-02-10 14:35
nt integral parts of a finished building.
1-1.2* It is the intention of this standard that classifications be based on performance during the period of exposure and shall not be used to determine suitability for use after fire exposure.
1-1.3 The results of these tests are one factor in assessing fire performance of building construction and assemblies. These methods prescribe a standard fire exposure for comparing the performance of building construction assemblies. Application of these test
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