SC Water And Sewer Lines Practice Questions - South Carolina Water And Sewer Lines Contractor Examination Exam

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A crew proposes to bench a 10-foot-deep water-main trench in Type C sandy soil instead of sloping it. What does OSHA 1926 Subpart P require?

Benching is not an allowed protective system in Type C soil; slope at 1.5:1 or use a designed support or shield system Simple benches are allowed if the first vertical face is 4 feet or less Multiple benches up to 5 feet high are allowed because the trench is under 20 feet Benching is allowed if the competent person performs a pocket penetrometer test

Correct Answer:

Benching is not an allowed protective system in Type C soil; slope at 1.5:1 or use a designed support or shield system

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