What is the angle of repose?

The angle of repose is defined as the steepest angle at which a sloped surface formed of a particular material is stable. This angle varies depending on the type of material, its granulation, moisture content, and other factors.

For granular materials like sand or gravel, the angle of repose typically falls between 30 to 45 degrees. A commonly referenced average angle for many types of material is around 34 degrees. This angle indicates the maximum slope at which the material can rest without sliding or collapsing under its own weight.

In practice, it is crucial for safe hoisting and construction operations to understand the angle of repose, as it informs decisions about equipment positioning, safety measures, and the management of piles of materials. Knowing that this angle is around 34 degrees helps ensure that workers maintain a safe working environment and adhere to best practices during construction and lifting operations.