Practice question

A protective system for an excavation more than 20 feet deep must be:

Any slope the foreman prefers
Designed by a registered professional engineer, or based on tabulated data approved by a registered professional engineer
A simple 1/2:1 slope in Type C soil without further design
Exempt from OSHA if a ladder is provided

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

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