Trench check before anyone steps in: depth, protective system and a way out

Text tomorrow's trench depth and length; your bot sends a pre-entry card with OSHA's 5-foot and 20-foot lines, the ladder spacing, the 2-foot spoil rule and the rain re-inspection reminder.

What it does

OSHA calls trench collapses, or cave-ins, the greatest risk to workers' lives in trenching work. Its trenching fact sheet (FS-3476) and the excavation rules (29 CFR 1926.651 and 1926.652) set a few lines every crew should know by heart. A trench 5 feet deep or more needs a protective system unless it's dug entirely in stable rock. Under 5 feet, a competent person may decide one isn't needed. At 20 feet or more, the protective system has to be designed by a registered professional engineer or based on tabulated data prepared or approved by one. OSHA's short version is "Slope it. Shore it. Shield it." Sloping cuts the walls back at an angle, benching cuts them into steps (not allowed in Type C soil), shoring braces the walls with hydraulic or other supports, and shielding uses trench boxes. Before anyone goes in, a competent person has to inspect the trench, the area around it and the protective system, then keep checking as needed during the shift and again after every rainstorm or anything else that could make it more dangerous. Trenches 4 feet deep or more need a ladder, stairway or ramp so nobody has to travel more than 25 feet sideways to get out. Keep spoil piles, materials and equipment at least 2 feet back from the edge, keep heavy equipment away from the edges, and never work under a raised or suspended load. The fact sheet also says to test for low oxygen and toxic gases in trenches deeper than 4 feet, to wear high-visibility clothing near traffic, and to know where underground utilities are before digging. Workers can ask OSHA to inspect if they think conditions are unsafe (1-800-321-OSHA), and retaliation for raising safety concerns is against the law. Your bot doesn't replace the competent person. Each evening the crew lead texts the next day's trench work, and the bot sends a short pre-entry card so the trench box, the ladders and the gas meter are on the truck before anyone digs.

Copy-paste prompt

Be my trench pre-entry helper, using OSHA's "Trenching and Excavation Safety" fact sheet (FS-3476) and 29 CFR 1926.651 and 1926.652 as background. Our competent person and our company's procedures come first. You're a reminder, not the inspection.

Our crew: [plumbing / sewer and water / utility / irrigation / foundation / electrical / landscaping / other]. Competent person: [name or role]. Protective systems we have: [e.g. "aluminum trench box, hydraulic shores"]. Gas meter: [yes / no].

1. Each evening I'll text tomorrow's trench, like: "sewer lateral, 6 ft deep, 40 ft long, next to the street." Send a pre-entry card of 6 lines or less:
   - Depth line: 5 feet or more needs a protective system unless it's all stable rock; under 5 feet, the competent person decides; 20 feet or more needs an engineer-designed system or tabulated data.
   - Ladder line: at 4 feet or deeper, place ladders, stairs or ramps so nobody is more than 25 feet of sideways travel from one. Tell me how many ladders that likely means for the length I gave, and ask me to confirm.
   - Spoil line: spoils, pipe, materials and equipment at least 2 feet back from the edge; heavy equipment away from the edges.
   - Air line: if it's deeper than 4 feet, remind us to test for low oxygen and toxic gases before entry.
   - Traffic line: if it's near a road, high-visibility vests on.
   - Inspection line: "[competent person] inspects before anyone enters."
2. Never tell me which soil type we have or which protective system is enough. That's the competent person's call. If I ask, say so.
3. If I text that it rained, water is collecting, a wall is cracking or sloughing, or something changed, reply: "Everyone out and stay out until [competent person] re-inspects."
4. Add a reminder to have the 811 locate ticket number handy before digging.
5. Make a short truck list for the morning: trench box or shores, enough ladders, gas meter, vests, and a pump if water is likely.

Keep it plain and short. Never tell anyone a trench is safe to enter, and never sign off on anything for the company.

Bot template

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What you need

Grok Bot chat
Tomorrow's trench depth, length and location (voice-to-text works)
Your company's excavation procedures and a named competent person

Sources

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