This calculator is for informational and educational purposes only. It does not replace the judgment of a competent person. Always consult a qualified professional for excavation safety planning.
OSHA Soil Classification
Cohesive soil with unconfined compressive strength of 0.5 tsf (48 kPa) or less; granular soils; submerged soil or soil from which water is freely seeping
Trench Dimensions
Trench depth from ground surface
Width at the bottom of the trench
Protection Method
OSHA Slope Ratios Reference
| Soil Type | Slope (H:V) | Max Angle |
|---|---|---|
| Stable Rock | Vertical | 90° |
| Type A | 0.75H : 1V | 53° |
| Type B | 1H : 1V | 45° |
| Type C | 1.5H : 1V | 34° |
Results
Setback Per Side
3.00m
Horizontal distance from bottom to top edge
Top Width
7.00m
Total width at ground level
Cross-Section Area
8.00m²
Trapezoidal excavation area per linear unit
Slope Angle
33.7\u00B0
1.5H:1V ratio
Cross-Section Diagram
<-- 7.00 m -->
\ /
\ 34° / setback: 3.00 m
\ /
\ /
| |
| 1.00 | depth: 2.00 m
| |
+-------+