NFPA 257 窗及玻璃隔断的火灾试验方法
日期:2020-03-26 10:12
st procedures that apply to the evaluation of fire window assemblies, including windows, glass block, and other light-transmitting assemblies intended to retard the spread of fire through openings in fire resistance-rated walls.
This standard is not to be construed as determining the suitability of fire window assemblies for continued use after fire exposure.
This standard provides a standardized method for comparing the performance of fire window assemblies.
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