For trenches not excavated entirely in stable rock, which pairing correctly identifies the egress-depth trigger and the depth at which the shallow-excavation exception to cave-in protection no longer applies?
Correct Answer
B) Egress at 4 feet under 1926.651; a protective system at 5 feet under 1926.652
For trenches, safe egress is required at 4 feet or deeper under 1926.651(c)(2). At 5 feet or deeper, cave-in protection is required unless the excavation is entirely in stable rock. Below 5 feet, the exception also requires a competent person to find no indication of a potential cave-in. Protective systems are not limited to shoring. Source: https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.652
Why This Is the Correct Answer
For trenches, safe egress is required at 4 feet or deeper under 1926.651(c)(2). At 5 feet or deeper, cave-in protection is required unless the excavation is entirely in stable rock. Below 5 feet, the exception also requires a competent person to find no indication of a potential cave-in. Protective systems are not limited to shoring. Source: https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.652
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