Under OSHA regulations, a competent person must inspect excavations daily. At what depth does OSHA require a protective system for excavations?
Correct Answer
C) 5 feet
OSHA 29 CFR 1926.652 requires protective systems for excavations 5 feet or deeper, unless the excavation is made entirely in stable rock. This protects workers from cave-ins and other excavation hazards.
Why This Is the Correct Answer
OSHA 29 CFR 1926.652(a) specifically requires protective systems for excavations 5 feet or deeper to protect workers from cave-ins. This regulation applies unless the excavation is made entirely in stable rock. The 5-foot threshold is a critical safety standard that contractors must follow to prevent excavation-related injuries and fatalities on construction sites.
Why the Other Options Are Wrong
Option A: 4 feet
4 feet is below the OSHA threshold. While excavations at 4 feet can still be dangerous, OSHA's protective system requirement doesn't kick in until 5 feet depth. This creates a false sense that 4-foot excavations automatically require protective systems under federal regulation.
Option B: 6 feet
6 feet exceeds the actual OSHA requirement by one foot. This misconception could lead contractors to believe they have an extra foot of leeway before implementing protective systems, potentially exposing workers to unnecessary cave-in risks during that critical 5-6 foot depth range.
Option D: 8 feet
8 feet is significantly higher than the actual 5-foot requirement. This major misconception could result in contractors failing to implement required protective systems for three full feet of excavation depth, creating serious safety violations and worker endangerment from 5-8 feet deep.
Memory Technique
Remember 'FIVE to STAY ALIVE' - at 5 feet deep, protective systems keep workers alive by preventing cave-ins.
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