Offline. Sign-offs save on this phone.

Toolbox Talks

Demo floors: holes, weak spots, and the drop zone

Falls 5 min 29 CFR 1926.850 · 29 CFR 1926.853 · 29 CFR 1926.855 · 29 CFR 1926.856

Demolition, Carpentry

Why it matters

Demolition opens holes in floors all day, and it weakens the floors that are left. Workers fall through openings left uncovered, through floors that were cut too wide, and get hit under spots where debris is being dropped.

The talk

On a gut job, the floor changes by the hour. Someone cuts out a section for a new stair. The plumber pulls a toilet and leaves the flange hole. A laborer tears up rotted subfloor by the tub. By lunch there are holes nobody knew about when the shift started. Add dust, bad light, and a wheelbarrow piled too high to see over, and it is easy to step right into one. Floors also get weaker as joists, beams, and arches get cut. A spot that held you yesterday might not hold you and a skid steer today.

Floor openings that are not being used to drop material must be covered with something strong enough for the load, and the cover has to be secured so it can't slide. If debris is dropped through a hole without a chute, the area below gets barricades at least 42 inches high and at least 6 feet back from the edge of the opening above, with warning signs on every level. Nobody works in that lower area until dropping stops. Holes cut for dropping material can't be more than 25 percent of the floor area unless the floor's side supports stay in place. Weakened floors get shored. Equipment does not go on a floor that can't carry the weight, and openings need curbs or stop logs so a machine can't roll in.

Here is how to keep it under control. The person who makes a hole covers it or guards it before walking away. Covers get marked and screwed or cleated down. Talk at the start of each shift about what gets opened today and where the drop zone is. Never pull a cover to dump a load without warning the crew below. Check with the competent person before running a skid steer or mini excavator on an upper floor. If a floor feels soft, bounces, or cracks, get off it and report it. Do not stand under a floor that is being broken out.

Key points

  1. Demo opens new floor holes all day.
  2. Cover any hole not used for dropping material, and secure the cover.
  3. Barricade the drop zone below at least 42 inches high and 6 feet back.
  4. Post warning signs on every level where material is dropped.
  5. Nobody works below until the dropping stops.
  6. Shore floors that demo has weakened.
  7. Machines go only on floors strong enough to hold them, with curbs or stop logs at openings.

Do this

  • Cover or guard any hole you make before you walk away.
  • Mark covers and fasten them down.
  • Warn the crew below before material goes down a hole.
  • Ask the competent person before putting equipment on an upper floor.
  • Report floors that feel soft, bounce, or crack.

Do not do this

  • Do not leave a hole open, even for a minute.
  • Do not pull a cover to dump debris without warning.
  • Do not walk into a barricaded drop zone.
  • Do not cut openings bigger than the plan allows.
  • Do not stand under a floor that is being broken out.

Talk about it

  1. What floor openings will we make today, and who covers each one?
  2. Where is today's drop zone, and how will we keep people out of it?

This is a short crew briefing. It does not replace a competent person, training, or the law.

Training aid only. This talk is not legal advice. It does not replace your company's safety program, a competent person, the equipment maker's instructions, or the OSHA standard itself.

Sign as a group Crew sign-off

Listens with this phone's voice. Nothing is sent out.

Send to the crew

The crew link opens the talk so each person can read it and sign on their own phone.

Scan at the jobsite. It opens the crew sign-off.

Scan at the jobsite. It opens the crew sign-off.