Excavation protection
Protect excavations deeper than 1.2 m before entry; keep spoil and equipment at least 1 m back.
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Workers can't enter an excavation deeper than 1.2 m unless its walls are sloped, shored or protected by a trench box. Keep spoil (dug-out soil) and equipment at least 1 m back from the edge.
O. Reg. 213/91 ↗
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