Angle of Repose
Tipping or dumping angles for some common materials like ashes, sand, earth, shingles
The angle of repose, or critical angle of repose, of a granular material is the steepest angle of descent or dip relative to the horizontal plane to which a material can be piled without slumping. At this angle, the material on the slope face is on the verge of sliding. Angle of repose - angle where materials will slide out of the tipped body - for some typical products:
Material | Angle of Repose (degrees) |
---|---|
Ashes, dry | 33 |
Ashes, moist | 36 |
Ashes, wet | 30 |
Asphalt | 45 |
Brick | 40 |
Cinders, dry | 33 |
Cinders, moist | 34 |
Cinders, wet | 31 |
Cinders and Clay | 30 |
Clay | 45 |
Coal, hard | 24 |
Coal, soft | 30 |
Coke | 23 |
Concrete | 30 |
Earth, loose | 28 |
Earth, compact | 50 |
Garbage | 30 |
Gravel | 40 |
Ore, dry | 30 |
Ore, damp or fresh mined | 37 |
Rubble | 45 |
Sand, dry | 35 |
Sand, damp | 40 |
Sand, with crushed stone | 27 |
Shingles | 40 |
Stone | 30 |
Stone, broken | 27 |
Stone, crushed | 30 |
- repose angle - the angle between the horizontal plane and the side of the pile
Download and print Stockpile Height vs. Diameter and Angle of Repose Chart
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