Excavation — A Trench Kills You Two Ways, and Only One of Them Is the Soil
Read this first. This note is awareness and toolbox-talk support — it is not training-of-record. Nothing here authorises an excavation, replaces your site permit-to-work procedure, or substitutes for a competent person's inspection, a designed protective system and a verified services search. Getting a piping lesson wrong over-designs a support. Getting this one wrong has a different consequence class.
A two-man crew is exposing a buried drain in an operating plant. The trench is about 1.8 m deep, a metre wide, and it has stood open since yesterday. It rained overnight. One of them is in it, scraping mud off the…
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design use.
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