When do need shoring and egresses when trencing
Shoring systems are required in trenches 4 feet (1.2 meters) deep or greater to protect workers from cave-ins, unless the excavation is made entirely in stable rock. A competent person must inspect excavations daily and after any event that could affect stability. Protective systems must be in place when there is indication of a potential cave-in.
Emergency egresses, such as a stairway, ladder, or ramp, must be located in trench excavations that are 4 feet (1.22 m) or more in depth, ensuring that workers have no more than 25 feet (7.62 m) of lateral travel to reach a safe means of exit. [1] [5] [6] [7] [9] [7]
Factors influencing the selection of an appropriate protective system include soil type, water content, changes due to weather, surcharge loads, and other operations in the area. [2]
Shoring systems must also be implemented when the stability of adjacent structures is endangered by excavation operations. [3] [4] [8] [10]
Important Safety Note:
Always verify safety information with your organization's specific guidelines and local regulations.
References
Page links are approximateSafety and Health Regulations for Construction (OSHA 29 CFR 1926) - 1926.651 - Specific Excavation Requirements
Open DocumentPage 5
Safety and Health Regulations for Construction (OSHA 29 CFR 1926) - 1926.651 - Specific Excavation Requirements
Open DocumentPage 3