Practice question

Per OSHA 29 CFR 1926.652, when an excavation is 20 feet deep or greater, the protective system must be:

Any commercially available aluminum hydraulic shore, without further review
Designed by a registered professional engineer, or based on tabulated data prepared or approved by a registered professional engineer
Sloped at 1:1 regardless of soil type
Omitted if a competent person classifies the soil as Type A

Answer: B — Designed by a registered professional engineer, or based on tabulated data prepared or approved by a registered professional engineer

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