Trenching and Excavation Safety Training
One of the biggest hazards related to trenching and excavation is the risk of cave-ins. An unstable trench or excavation can collapse, killing or injuring workers by suffocation or crushing when a worker is buried by falling soil. Trench stability is affected by a number of factors such as:
- improper use or installation of support system or trench box
- soil type and moisture content
- depth of the trench
- length of time the trench is left open
- surcharge (excessive weight near the trench)
- adjacent buildings and structures
- existing foundations, and
- previous excavations or soil disturbances.
There are three basic methods of protecting workers against trench cave-ins:
- trench boxes
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