At what depth does an excavation generally require a protective system such as sloping, shoring, or shielding to protect workers from cave-ins?
a.3 feet or more
b.5 feet or more
c.2 feet or more
d.10 feet or more
Explanation
1926.652 and T8 §1541.1 require cave-in protection for excavations 5 feet deep or more, unless made entirely in stable rock. A protective system may also be required shallower if a competent person sees potential for cave-in.
Law Reference: 29 CFR 1926.652(a) / T8 CCR §1541.1This topic, taught in full in the CSLB Law & Business guide. CSLB Law & Business — Complete Study Guide (2026) — PDF + EPUB, $24.99 · 14-day refund →
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- Who must inspect an excavation for hazardous conditions before employees enter and as conditions change?
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Reviewed by Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — verify)