安全第 1273 / 1605 题
When a portable ladder is used to access an upper landing surface, the side rails must extend at least how far above the landing?
a.5 feet
b.6 inches
c.3 feet
d.1 foot
解析
1926.1053(b)(1) requires the ladder side rails to extend at least 3 feet above the upper landing surface, or be otherwise secured/gripped so the user can maintain a firm handhold.
法律依据: 29 CFR 1926.1053(b)(1)免费刷完整 1605 道题库 — 无需注册。
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