Excavations less than how many feet in depth do not require shoring or sloping if examination of the ground finds no indication of a cave-in?

Excavations less than how many feet in depth do not require shoring or sloping if examination of the ground finds no indication of a cave-in?

• A. 3 feet
• B. 5 feet
• C. 7 feet
• D. 9 feet

Answer: (B)

Protective systems for trenches depend on how deep the excavation is. The rule uses a five-foot threshold: excavations deeper than five feet require shoring, sloping, or another protective system, unless a competent person has inspected the trench and found stable soil with no signs of a cave-in. If the trench is shallower than five feet and the soil shows no indicators of movement or instability, no protective system is required. The key idea is that the risk of a cave-in increases with depth, so five feet marks the standard point at which protection becomes mandatory, assuming the ground has been evaluated and found safe. If conditions change or indicators of instability appear, protective measures would then be needed even at lesser depths.

Protective systems for trenches depend on how deep the excavation is. The rule uses a five-foot threshold: excavations deeper than five feet require shoring, sloping, or another protective system, unless a competent person has inspected the trench and found stable soil with no signs of a cave-in. If the trench is shallower than five feet and the soil shows no indicators of movement or instability, no protective system is required. The key idea is that the risk of a cave-in increases with depth, so five feet marks the standard point at which protection becomes mandatory, assuming the ground has been evaluated and found safe. If conditions change or indicators of instability appear, protective measures would then be needed even at lesser depths.