Trenching and excavation toolbox talk
A cubic yard of soil weighs about as much as a small car, and a collapse gives no warning. The two things that keep people alive are knowing what is buried before you dig, and having real protection in the trench.
Run the talk
- Before the ground opens, we establish where the underground installations are. That means contacting the utilities and owners, not guessing from the drawings.
- Nobody goes into an unprotected excavation. Sloping, shoring or a shield — one of them, in place, before anyone is in there.
- The competent person makes the call on the ground conditions, and that call can change after rain, after vibration, or after the spoil pile grows.
- Spoil, plant and materials belong back from the edge, not on it.
- If the trench changes character while you are in it, you get out first and discuss it from up here.
Ask the crew
- What is buried in the area we are opening today, and how do we know?
- What protective system is going in, and who checked it this morning?
- What would make you climb out of a trench without being told to?
Check before you leave the huddle
- Confirm underground installations were located and utilities contacted.
- Confirm the protective system is in place before anyone enters.
- Check spoil and equipment are set back from the excavation edge.
The requirements behind it
From SiteSafetyDocs clause bank 2026.08.28-ai3. The talking points above are prompts for a conversation; the rows below are the requirements. Each row condenses the cited provisions — follow the citation for the exact regulatory text. Rows marked practice are recognised good practice, not a CFR duty.
| Clause | Requirement | Citation |
|---|---|---|
| CTL-EXC-003 | Daily inspections of excavations, the adjacent areas, and protective systems shall be made by a competent person for evidence of a situation that could result in possible cave-ins, indications of failure of protective systems, hazardous atmospheres, or other hazardous conditions; where such conditions are found, exposed employees shall be removed from the hazardous area until the necessary precautions have been taken. | 29 CFR 1926.651(k)(1); 29 CFR 1926.651(k)(2) |
| CTL-EXC-004 | Employees shall be protected from excavated soil, other materials, and equipment that could pose a hazard by falling or rolling into an excavation, by keeping such materials or equipment at least 2 feet from the edge of the excavation, by using retaining devices, or by a combination of both. | 29 CFR 1926.651(j)(2) |
| CTL-EXC-001 | Before opening an excavation, the estimated location of underground utility installations shall be determined, and utility owners shall be contacted within established or customary local response times. | 29 CFR 1926.651(b)(1); 29 CFR 1926.651(b)(2) |
| CTL-EXC-002 | Each employee in an excavation shall be protected from cave-ins by an adequate protective system unless the excavation is made entirely in stable rock or is less than 5 feet deep and a competent person finds no indication of a potential cave-in. | 29 CFR 1926.652(a)(1) |
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