Design & Sizing第 29 / 110 题
An individual vent serving a lavatory is 1-1/2 in. The vent sizing table limits a 1-1/2 in vent to a maximum developed length of 150 ft at the fixture-unit load carried. If the vent run is 90 ft, is the vent acceptable and why?
a.Yes, 90 ft is within the 150 ft limit
b.No, it exceeds the length limit
c.No, the vent must equal the drain size
d.Yes, vents have no length limit
解析
A 90 ft developed vent length is within the 150 ft maximum allowed for a 1-1/2 in vent at that load, so the vent is acceptable. Vent sizing depends on both the fixture-unit load and the total developed length; exceeding either forces a larger vent. Vents do have length limits, so the no-limit answer is wrong.
法律依据: IPC §906.2免费刷完整 110 道题库 — 无需注册。
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