A construction site has an excavation 8 feet deep. According to OSHA 29 CFR 1926.651, what is required for worker protection?
Correct Answer
A) Protective systems are required for excavations 5 feet or deeper
OSHA 29 CFR 1926.651 requires protective systems (sloping, benching, or shoring) for excavations 5 feet or deeper where workers may be exposed to cave-ins.
Why This Is the Correct Answer
OSHA 29 CFR 1926.651(k)(1) specifically states that employees working in excavations 5 feet or deeper must be protected from cave-ins by an adequate protective system. This regulation applies to all excavations where employees could potentially be exposed to cave-ins, regardless of soil type or conditions. Since the excavation in question is 8 feet deep, it exceeds the 5-foot threshold and therefore requires protective systems such as sloping, benching, shoring, or shielding. The 5-foot rule is a fundamental safety requirement that contractors must know and implement on all job sites.
Why the Other Options Are Wrong
Option B: Protective systems are required for excavations 6 feet or deeper
This is incorrect because OSHA requires protective systems at 5 feet, not 6 feet. Waiting until 6 feet would expose workers to unnecessary risk for that additional foot of excavation depth, which could still result in serious cave-in injuries or fatalities.
Option C: Protective systems are required for excavations 8 feet or deeper
This is incorrect because it suggests protective systems are only required at 8 feet or deeper, which would leave workers unprotected in excavations between 5-7 feet deep. This violates OSHA standards and creates significant safety hazards.
Option D: No protective systems required for excavations under 10 feet
This is completely incorrect and dangerous. OSHA absolutely requires protective systems for excavations 5 feet and deeper, and a 10-foot threshold would expose workers to extreme cave-in risks that could easily result in fatalities.
Memory Technique
Remember 'Five to Stay Alive' - protective systems are required at 5 feet or deeper to keep workers alive and safe from cave-ins.
Reference Hint
OSHA Construction Standards 29 CFR 1926 Subpart P - Excavations, specifically section 1926.651(k)(1)
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