This course provides supervisors with the technical expertise and legal understanding required to oversee complex excavation projects. The focus is on proactive hazard analysis and the correct design and implementation of protective systems to safeguard against the leading cause of fatalities in excavation work: trench collapse.

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Major Topics Covered

 

• Legal Requirements and Competent Person Role

  • In-depth study of the OHS Act and specific Construction Regulations pertaining to excavations.

  • Defining the Role and Responsibilities of the Competent Person (Excavation Supervisor).

  • Statutory duties related to permits, inspections, and record-keeping.

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• Excavation Hazards and Risk Analysis

  • Analyzing the four major hazards: Cave-ins, Hazardous Atmosphere, Ground/Surface Water, and Mobile Equipment.

  • Case studies on trench failure and accident prevention.

  • Identifying potential overhead and underground utilities.

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• Soil Analysis and Trench Failure

  • Classifying Soil Types (e.g., Stable Rock, Type A, B, and C) to determine protection needs.

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• Protective Systems: Shoring, Shielding, and Sloping

  • Detailed design and application of Sloping and Benching methods.

  • Proper selection and installation of Shoring Systems (materials, placement, and secure fastening).

  • Using Trench Boxes/Shield Systems to protect workers (placement, movement, and restrictions).

  • Inspection and maintenance of all protective materials.

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• Supervision and Safety Protocols

  • Pre-excavation Planning (locating utilities, pre-task meetings).

  • Ensuring safe access and egress (ladders, ramps).

  • Requirements for Atmospheric Testing in deep trenches.

  • Placement of Spoil Piles and control of surface loads (surcharge).

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By the end of this course

learners will be competent to perform the duties of an Excavation Supervisor, including classifying soil types, selecting the appropriate protective system, conducting daily site inspections, and ensuring the absolute safety and regulatory compliance of all excavation and trenching activities.