Angles of Repose
Tipping or dumping angles for common materials like ashes, sand, earth, shingles and more. The angle of repose is the steepest angle of descent relative to the horizontal plane to which a material can be piled without slumping.
| Material | Angle of Repose (degrees) |
|---|---|
| Alfalfa, ground | +45 |
| Alum, lumpy | 30 - 45 |
| Alum, pulverized | 30 - 45 |
| Alumina | 30 |
| Asbestos, shredded | 30 |
| Ashes, dry | 33 |
| Ashes, moist | 36 |
| Ashes, wet | 30 |
| Asphalt | 45 |
| Bagasse | 45 |
| Baking powder | 30 - 45 |
| Bark, wood refuse | 45 |
| Bauxite, crushed | 30 - 45 |
| Bentonite | 45 |
| Bicarbonate of Soda | 42 |
| Borax, fine | 30 - 45 |
| Bran | 30 - 45 |
| Brewers grain | 45 |
| Brick | 40 |
| Calcium Carbide | 30 - 45 |
| Chalk, fine | 45 |
| Chalk, lumpy | 45 |
| Chromic acid, flake | 25 |
| Chromium ore | 30 - 45 |
| Cinders, dry | 33 |
| Cinders, moist | 34 |
| Cinders, wet | 31 |
| Cinders and Clay | 30 |
| Clay | 45 |
| Clover seed | 28 |
| Coal, hard | 24 |
| Coal, soft | 30 |
| Coconut, shredded | 45 |
| Cofee, fresh beans | 35 - 45 |
| Coke | 23 |
| Concrete | 30 |
| Cork, ground | 45 |
| Corn, grits | 30 - 45 |
| Cottonseed, cake lumpy | 30 - 45 |
| Cryolite | 30 - 45 |
| Cullet | 30 - 45 |
| Dolomite, lumpy | 30 - 45 |
| Earth, loose | 28 |
| Earth, compact | 50 |
| Feldspar, pulverized | 45 |
| Fish, meal | 45 |
| Flour, wheat | 45 |
| Fluorspar, lumps | 45 |
| Garbage | 30 |
| Gluten, meal | 30 - 45 |
| Graphite, flake | 30 - 45 |
| Gravel | 40 |
| Gypsum, pulverized | 45 |
| Hops, moist | 45 |
| Ilemenite | 30 - 45 |
| Iron oxide pigment | 40 |
| Kaolin, green crushed | 35 |
| Lignite, dry | 30 - 45 |
| Lime, hydrated | 30 - 45 |
| Limestone, pulverized | 45 |
| Linseed, meal | 30 - 45 |
| Malt | 30 - 45 |
| Marble, broken | 30 - 45 |
| Mica, broken | 30 - 45 |
| Milk. powdered | 45 |
| Oats | 32 |
| Oats, rolled | 30 - 45 |
| Ore, dry | 30 |
| Ore, damp or fresh mined | 37 |
| Oyster shells, ground | 30 - 45 |
| Peanuts, shelled and not shelled | 30 - 45 |
| Potassium chloride | 30 - 45 |
| Rice grits | 30 - 45 |
| Rice, rough | 30 - 45 |
| Rubber, ground scrap | 45 |
| Rubble | 45 |
| Salt, coarse | 30 - 45 |
| Salt, fine | 30 - 45 |
| Saltpeter | 30 - 45 |
| Sand, dry | 35 |
| Sand, damp | 40 |
| Sand, with crushed stone | 27 |
| Shale, broken | 30 - 45 |
| Shingles | 40 |
| Slate, pulverized | 30 - 45 |
| Soap, chips | 30 - 45 |
| Soap. powder | 30 - 45 |
| Soda ash | 30 - 45 |
| Stone | 30 |
| Stone, broken | 27 |
| Stone, crushed | 30 |
| Sugar, granulated | 30 - 45 |
| Sugar, raw cane | 45 |
| Sulfur | 30 - 45 |
| Tobacco | 45 |
| Wheat | 28 |
| Zinc oxide | 45 |