Materials must be placed and vehicles kept more than 1.5 m away to prevent collapse. The spoil
pile must be sloped not more than a 45° angle and placed at least 1 m away from the edge of the
excavation or trench. Exposed cables/piping will be supported.
A safe point of access/egress must be provided not more than 8 m from the worker. All ladders
must be securely anchored at the top and bottom and provide one-foot clearance behind the rungs.
Steps benched into the slopes may not be adequate for access.
Excavations must be inspected by the supervisor daily and the inspection recorded at all
access/egress points before work starts.
Trenches or excavations less than 3 m (10 ft.) in depth must be supported, sloped or shored as
specified by OH&S Code. This shoring must be installed from a ladder working from the top down
and removed from a ladder working from the bottom up.
If sloping is used, then the slope must start from the bottom of the excavation….
If the walls of an excavation are cut back, the following conditions apply based on soil conditions:
- “Hard and compact soil”, the walls must be sloped to the base of the excavation at an angle of not less than 30° measured from the vertical
- “Likely to crack or crumble soil” the walls must be sloped to the base of the excavation at an angle of not less than 45° measured from the vertical
- “Soft, sandy or loose soil” the walls are sloped from the base of the excavation at an angle of not less than 45° measured from the vertical.
To be continued……
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