Which condition defines the angle of repose in excavation safety?

The angle of repose is defined as the steepest angle at which soil or material can remain stable without additional support. This is a critical concept in excavation safety, as it dictates how steeply the sides of a trench or excavation can be inclined without risking a collapse. When the angle exceeds this stable point, the material can slide down, leading to potential hazards for workers within or around the excavation site.

Choosing this correct condition is essential for ensuring safety in excavation work. Recognizing the angle of repose helps in planning the excavation design, implementing proper shoring or bracing, and maintaining safe working conditions. Understanding this principle ensures that construction activities can proceed without risking the stability of the ground and the safety of workers.