Excavation and Excavation Supports
In many construction jobs deep excavations must be made before the structure can be built.
When excavations have the potential to endanger lives or adjacent properties, bracing to support the soil must be designed.
The Occupational Safety and Health Act (OSHA) requires that all trenches exceeding 5 feet in depth be shored.
In large construction areas, excavation walls may be sloped, instead of providing structural support.