Watch these practical demonstrations to learn proper manual and mechanical trenching techniques:
Whether you are installing a French drain or laying electrical cables , follow these steps:
: Trenches 5 feet or deeper must have a protective system like shoring or a trench box .
: Keep excavated soil ("spoils") at least 2 feet away from the trench edge to prevent cave-ins.
: Requires a ladder or ramp for exit, located within 25 feet of workers.