An toànCâu 1272 / 1605
Supported scaffold poles, legs, or uprights must be plumb and braced, and generally must rest on:
a.Loose bricks
b.Stacked scaffold planks
c.Wet soil
d.Base plates and mud sills (adequate firm foundation)
Giải thích
1926.451(c)(1) requires supported scaffolds to bear on base plates and mud sills or another adequate firm foundation. Unstable objects like loose bricks or blocks must not support scaffolds or platforms.
Trích dẫn luật: 29 CFR 1926.451(c)(1)Luyện miễn phí toàn bộ 1605 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Who must inspect a scaffold before each work shift and after any occurrence that could affect its structural integrity?
- Scaffold platforms must be fully planked or decked, and generally the gap between planks or between the platform and uprights must not exceed:
- When a scaffold platform is more than 2 feet above or below a point of access, what must be provided?
- When a portable ladder is used to access an upper landing surface, the side rails must extend at least how far above the landing?
- For a non-self-supporting (leaning) portable ladder, what is the proper setup angle?
- While climbing or working on a ladder, an employee must:
Cập nhật gần nhất: · quy trình kiểm tra
Sen Lin, Người sáng lập PrepPass · Đối chiếu với California CSLB Contractor License Law & Business Exam · Quy trình kiểm tra
Người kiểm duyệt Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — kiểm tra)