GB/T 17889.5-2019
梯子第5部分:伸缩梯
Ladders—Part 5: Telescopic ladders
2019-08-30 发布
2020-03-01 实施
目 次
前言...........................................1
引言..........................................1
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........................................3
4.1基本尺寸......................................3
4.2顶部踏棍/踏板间隙.................................3
4.3平衡杆.......................................4
5要求.........................................4
5.1 一般要求.....................................4
5.2踏棍/踏板间距...................................4
5.3倚靠式梯子顶部的附加要求...............................4
5.4踏棍/踏板梯段的锁定..................................5
5.5 设计..........................................5
6 试验.............................................5
6.1 总则...........................................5
6.2倾倒试验........................................5
6.3梯框强度试验......................................6
6.4梯框弯曲试验 ......................................7
6.5梯框侧向挠度试验.................................7
6.6梯框底端试验....................................7
6.7踏棍/踏板/平台的垂直载荷试验 ...........................7
6.8踏棍/踏板扭转试验..................................8
6.9踏棍/踏板拉拔试验..................................8
6.10自立式梯子张开限制和钗链试验...........................9
6.11倚靠式梯子的底部滑移试验.............................9
6.12锁定机构试验...................................10
6.13梯脚拉拔试验...................................12
6.14梯子长度方向扭转试验..............................12
6.15塑料梯的附加试验.................................13
6.16塑料踏棍/踏板支架试验..............................13
6.17自立式梯子耐久性试验..............................13
6.18 开合循环试验 ...................................15
7标识与使用说明书....................................15
7.1 一般要求......................................15
GB/T 17889.5—2019
7.2 标识...............................................15
7.3使用说明书.............................................16
附录A （规范性附录）试验顺序.......................................17
参考文献..................................................18