Spoil piles must be placed so that:
- They are kept at least 1 m (3 ft.) from the edge of the excavation or trench for excavations or trenches that are less than 3 m (10 ft.) in depth, or
- They are kept at least 3 m (10 ft.) from the edge of the excavation or trench for excavations or trenches that are more than 3 m (10 ft.) in depth.
- The slope of the spoil pile is at an angle not less than 45° to the vertical
- Loose materials are scaled and trimmed from the spoil pile.
Trenches or excavations deeper than 3 m (10 ft.) must have temporary protective structures designed, constructed and installed in accordance with the specifications of a professional engineer.
Trenches or excavations that may affect the stability of a foundation or other support structure must have a temporary supporting structure installed that is designed, constructed and installed in accordance with the specifications of a Professional Engineer. This structure must be installed prior to proceeding with the work. All temporary protective structures must be inspected and tagged by a field engineer upon completion and every 7 days thereafter.
Subsequently, all persons entering the excavation must check for correct tag and obvious defects immediately prior to every entry. Excavations and trenches deeper than 1.5 m (5 ft.) may be considered as a confined space by some client and subject to permit control, both on existing and greenfield sites. A hazard assessment must be completed to determine the control requirements needed. Gas testing is required if there is possibility for: introduction of hazardous products from existing facilities, or excavating is being done in contaminated soils; use of fuel gas for heating innhoardings; use of inert gases for welding or other purposes; the accidental introduction of any other hazardous gas. If this is the case then Confined Space Entry Procedure shall be followed, with an emphasis on recorded gas testing, extrication of persons in medical emergencies and fire protection emergencies. A procedure must be developed for identifying possible soil contamination and assessing health hazards with precautions to be taken.
Share This Article
Subscribe to our RSS Feed. What is RSS?