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Excavation Slopes

Calculating excavation slope.

excavation slope

Excavation Slopes

Excavation Slopes vs. Type of Soils
Type of SoilSlope
(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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