Trenching and Excavating – Module ID 27306-14

Trenching and Excavating – Module ID 27306-14


Module 27306-14 introduces trainees to the techniques required for working in and around excavations, particularly when preparing building foundations, including the types and bearing capacities of soils; procedures used in shoring, sloping, and shielding trenches and excavations; trenching safety requirements; and mitigation of groundwater and rock when excavating foundations.

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Learning Objective 1 – List safety considerations for trenches and excavations.

  • List safety guidelines when working in and around foundation excavations.
  • Identify safety hazards when working in and around trenches.
  • Describe various shoring, shielding, and sloping systems used for trenches and excavations.

Learning Objective 2 – Identify the different types, bearing capacities, and classifications of soils.

  • Explain how soils are classified.
  • Describe soil composition and how it relates to density.
  • Explain the purpose of fill in a construction project.

Learning Objective 3 – Describe the methods of compacting and testing soil.

  • Describe how moisture content affects soil compaction.
  • Explain why soil is compacted in lifts.
  • Describe how soil compaction is tested.

Learning Objective 4 – Explain surface water, groundwater, and rock mitigation as related to concrete.

  • Describe how surface water and groundwater are mitigated.
  • Describe how rock is mitigated.

Performance Tasks

Performance Task 1 (Learning Objective 1) – Draft a job hazard/safety analysis for an excavation according to instructor’s specifications.

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