NFPA 257: Standard on Fire Test for Window and Glass Block Assemblies
Current Edition: 2012 Next Edition: 2017

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NFPA 257: Standard on Fire Test for Window and Glass Block Assemblies, 2012 EditionNFPA 257: Standard on Fire Test for Window and Glass Block Assemblies
Use the latest criteria to measure how well fire window assemblies prevent or slow the spread of fire.
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