Excavation Slopes
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Excavation Slopes
| Type of Soil | Slope (x : y) |
|---|---|
| Solid rock, shale or cemented sand and gravels | 0 : 1 |
| Compact angular gravels | 1/2 : 1 |
| Recommended slope for average soils | 1 : 1 |
| Compact sharp sand | 1 1/2 : 1 |
| Well-rounded loose sand | 2 : 1 |
Example - An Excavation in Sharp Sand, 10 ft deep
Excavation in sharp sand should be sloped 1 1/2 unit for each unit depth.
(10 feet) (1 1/2 feet/foot) = 15 feet
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