NFPA 257

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Standard on Fire Test for Window and Glass Block Assemblies

This document advances fire safety by establishing test protocols to measure how well window and glass block assemblies prevent or slow the spread of fire, providing a standardized method for comparing the relative performance of different fire window assemblies.

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NFPA members and public sector officials may submit a question on an NFPA code or standard. Responses are provided by NFPA staff on an informal basis.

NFPA 257: News & Research

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