11. Sloping Excavation Walls

• Types
  • fully sloped
  • combination slope & straight cut
• Walls must be sloped at a 45° angle (1–to–1 slope).
• For combination slope & straight cut trenches, maximum height of straight cut is 3' (1m).
• Overall allowable depth for a combination & straight cut excavation is 15' (4.5m).
• Keep sides trimmed or scaled to prevent loose material rolling down into the excavation.
• Check excavation slopes daily for movement.