物理安全检测
BS 1139-4 金属脚手架-预制钢叉架和栈桥
BS 1139-4 金属脚手架-第4部分：预制钢叉架和栈桥—标准名称
BS 1139-4 Metal scaffolding-Part 4: Specification for prefabricated steel splitheads and trestles
BS 1139-4 金属脚手架-第4部分：预制钢叉架和栈桥
BS 1139-4 金属脚手架-第4部分：预制钢叉架和栈桥—适用范围
Scope:
This British Standard specifies requirements for the design and fabrication of steel splitheads and steel trestles for use as supports for temporary platforms.
BS 1139-4 金属脚手架-第4部分：预制钢叉架和栈桥—测试标准和要求
BS 1139-4 Dimension 尺寸
BS 1139-4 Stability 稳定性
BS 1139-4 Vertical load carrying capacity 垂直载荷
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