EN 17020-1:2022 耐火和/或防烟门和可开窗自闭耐久性试验结果的扩展应用 第1部分：铰链和枢轴式钢门自闭耐久性
Extended application of test results on durability of self-closing for fire resistance and/or smoke control doorsets and openable windows - Part 1: Durability of self-closing of hinged and pivoted steel doorsets
This document covers single and double leaf, hinged and pivoted, steel based doorsets as covered by EN 15269-2 and/or EN 15269-20. This document prescribes the methodology for exte...