Temporary supports installed in an excavation to prevent the walls from caving in on workers.
Temporary or permanent support structures used to prevent the collapse of excavation walls and protect workers and adjacent structures from soil movement. Shoring systems include timber shoring, hydraulic trench boxes, soldier piles with lagging, sheet piling, and soil nail walls. OSHA requires shoring or other protective systems for excavations deeper than 5 feet.
A steel trench box (shoring) was required for all trench excavations exceeding 5 feet in depth to comply with OSHA 29 CFR 1926.652.
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