A trench for a site utility is 5 ft 6 in. deep in soil that has not been classified as stable rock. What OSHA protective-system trigger controls the trench work?
Correct Answer
B) A protective system is required at 5 ft or more unless the excavation is entirely in stable rock
OSHA 1926.652(a)(1) requires each employee in an excavation to be protected from cave-ins by an adequate protective system, except when excavations are made entirely in stable rock or are less than 5 ft deep and a competent person finds no cave-in potential. Other choices delay or waive the OSHA trigger incorrectly.
Why This Is the Correct Answer
OSHA 1926.652(a)(1) requires each employee in an excavation to be protected from cave-ins by an adequate protective system, except when excavations are made entirely in stable rock or are less than 5 ft deep and a competent person finds no cave-in potential. Other choices delay or waive the OSHA trigger incorrectly.
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