Drainage, Waste & Vent第 4 / 120 题
A 4 in building drain runs 96 ft from the last fixture connection to the point where it leaves the structure. Installed at the code minimum slope for its size, what is the total fall?
a.6 in
b.12 in
c.24 in
d.48 in
解析
Drainage pipe 3 in and larger may be sloped at a minimum of 1/8 in per ft, so 96 ft x 1/8 in = 12 in of fall. 6 in results from using 1/16 in per ft, which is allowed only for 8 in and larger pipe where approved, and 24 in comes from applying the 1/4 in per ft rate used for 2-1/2 in and smaller pipe.
法律依据: IPC §704.1免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- A horizontal 2 in fixture branch is installed at the code minimum slope. Over a developed run of 18 ft, how much total fall does the pipe have?
- What is the maximum developed length permitted between the trap weir and the vent opening for a 1-1/2 in trap arm?
- Except for traps specifically designed as deep seal traps, what is the required liquid seal depth of a fixture trap?
- A fixture drain serving a lavatory is 1-1/2 in in diameter. What is the smallest vent size that may serve it?
- A horizontal building drain changes direction with a fitting that turns the flow 90 degrees. What does the code require at that point?
- A 2 in trap arm serves a floor-mounted fixture. The trap weir is at elevation 0. What is the greatest amount the trap arm may fall before it reaches the vent connection?