Barriers & Fall Protection at Excavation Edges
An open excavation is a hole in the ground that people, vehicles and equipment can fall into. The edge is also where the soil is weakest. Barriers keep people and equipment back, and they protect the public as well as your crew.
- Construction
- Excavation
- Utilities
What OSHA requires
- Employees at the edge of an excavation 6 feet or more in depth must be protected from falling by guardrail systems, fences, barricades or covers (29 CFR 1926.501(b)(7)).
- Employees at the edge of a well, pit, shaft or similar excavation 6 feet or more deep must be protected the same way. Wells, holes and covers have their own rules. See Holes & Floor Openings.
- Where the excavation is hard to see because of plants, snow or other cover, fall protection is required, since people can step into it without noticing.
- Spoil piles and equipment must be kept at least 2 feet from the edge, or retained so they can’t roll in (1926.651(j)(2)). See Access, Egress & Spoils.
- Warning systems such as barricades, hand or mechanical signals or stop logs are required when mobile equipment operates near the edge and the operator can’t see it clearly (1926.651(e)).
Shallower excavations can still injure people. Many employers and states set barriers for any open excavation where people or the public could fall in, so follow the stricter rule.
Types of protection
| Method | Good for | Watch for |
|---|---|---|
| Guardrails | Walkways and places people work near the edge | Top rail about 42 inches high, a mid rail, and strong enough posts. See Guardrails |
| Fences and barricades | Keeping people and the public back from a long open trench | Must be solid, set back from the edge and visible. Flimsy tape alone isn’t a barrier |
| Covers | Small pits, shafts and holes, and overnight | Strong enough for the load, secured, and clearly marked. See Holes & Floor Openings |
| Stop logs and berms | Keeping vehicles from driving into the excavation | Must stop the heaviest vehicle that will approach |
Where guardrails aren’t practical, a fall arrest or restraint system may be needed. See Fall Protection Basics.
Working near the edge
- Keep the barrier between you and the edge, and don’t lean over or reach past it.
- Stay back from the edge, which can crumble under your weight. See Cave-In Warning Signs.
- Use a spotter when equipment works or backs near the edge. See Backing & Spotters.
- Keep materials, tools and spoil away from the edge so they can’t fall onto people below.
- Keep walkways and access ladders clear. See Walkways & Crossings Over Trenches.
Public, night and weekend protection
- Protect the public with fences, barricades, lights and signs around any excavation near sidewalks, roads or homes. Children and pedestrians fall in more than workers do.
- Cover or fence the excavation at the end of each day, and light it if it’s near traffic. See Work Zones.
- Snow, tall grass and darkness can hide an open hole. Check your barriers after a storm.
- Don’t leave an excavation open longer than necessary. See Backfilling & Compaction.
If someone falls in
Call 911. Don’t enter an unprotected excavation to rescue someone. A second collapse can trap rescuers. See Trench Emergencies.
Edge checklist
- Guardrails, fences, barricades or covers at every excavation 6 feet or deeper
- Spoil and equipment at least 2 feet back, or retained
- Spotter and warning system where equipment works near the edge
- Public protected with fencing, lights and signs
- Excavation covered or fenced at the end of the day and checked after storms
Standards & references
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