Hardscape & Grading第 48 / 100 题
Finished grade around a building should slope away from the foundation at approximately what minimum for the first several feet?
a.Flat, with no slope
b.About 5 percent (roughly 6 inches of fall over 10 feet)
c.Sloping toward the building
d.A 45-degree drop
解析
A common standard is to slope soil away from a foundation about 6 inches over the first 10 feet, roughly a 5 percent grade, to carry surface water away from the structure. Sloping toward the building or leaving it flat allows water to pond against the foundation. Positive drainage protects the structure from moisture damage.
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