梯子　第4部分：铰链梯 Ladders—Part 4: Hinged ladders  ICS  13.110 CCS  J 09   中华人民共和国国家标准 GB/T 17889.4—2024 代替 GB/T 17889.4－2012 2024-08-2 3发布 2024-08-2 3实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 引言   ·····································································································   Ⅴ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     功能尺寸   ······························································································   4      4.1     一般要求   ·························································································   4      4.2     铰链梯用作倚靠式梯子或自立式梯子   ···························································   5      4.3     多铰链梯用作平台   ···············································································   5      4.4     多铰链梯用作支座   ···············································································   6 5     要求   ··································································································   7      5.1     一般要求   ·························································································   7      5.2     台板件   ···························································································   7 6     试验方法   ······························································································   7      6.1     一般要求   ·························································································   7      6.2     铰链梯强度试验   ·················································································   7      6.3     多铰链梯的附加强度试验   ········································································   8      6.4     铰链循环试验   ····················································································   9      6.5     铰链梯用作平台时的试验   ········································································   9 7     使用信息   ····························································································   11      7.1     一般要求   ························································································   11      7.2     标志   ·····························································································   11      7.3     使用说明书   ·····················································································   11 附录A （规范性）    铰链梯试验顺序   ··································································   13 参考文献   ································································································   15 GB/T 17889.4—2024     Ⅰ