NFPA 257窗及玻璃隔斷的火災試驗 – 標準名稱
NFPA 257：Standard on Fire Test for Window and Glass Block Assemblies
NFPA 257：絕緣軟套管規(guī)范-第2部分：試驗方法
NFPA 257窗及玻璃隔斷的火災試驗 – 適用范圍
該標準規(guī)定了適用于評估防火窗組件（包括窗戶，玻璃塊和其他透光組件）的標準化防火和軟管流測試程序，這些組件旨在阻止防火通過耐火等級墻壁中的開口蔓延。
該標準不應解釋為確定防火窗組件在著火后能否繼續(xù)使用的適合性。
該標準提供了比較防火窗組件性能的標準化方法。
This standard prescribes standardized fire and hose stream test 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.
