Lập kế hoạch & Dự toánCâu 297 / 360
When planning a trench for a building sewer, what does the CPC require regarding the bottom of the trench?
a.It may contain sharp rocks as long as the pipe is strong
b.The pipe must rest on a firm bed for its entire length, with bell holes provided at joints
c.The trench must be filled with water first
d.The bottom can slope backward toward the building
Giải thích
CPC 313.0 requires piping to be laid on a firm bed throughout its length, with bell holes excavated at joints so the barrel bears evenly. Point loading on rocks or unexcavated bell holes can crack pipe or throw off the slope. Planning proper bedding protects the line and keeps the required fall to the main.
Trích dẫn luật: 2022 California Plumbing Code (CPC) §314.0Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
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