Drilling walls: what is behind the mark?
5–10 minute crew discussion · Reviewed September 23, 2026
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Leader: review the source and site procedures before presenting. Adapt this briefing to today’s task and the crew’s language and training needs. This is an original educational talk, not OSHA-issued training or certification.
Start the conversation
A mounting drawing shows a new hole location, but the wall also contains existing building services.
Key talking points
- Review drawings, site information, and the approved locating process before penetrating a wall, floor, or ceiling. A mark on a drawing does not prove that hidden services are absent.
- Have the responsible person resolve uncertainty about electrical circuits and other services. Scanning equipment has limitations; an inconclusive check must not be treated as clearance to proceed.
- Inspect the opposite side when safely accessible and coordinate with affected occupants. Include the drill's travel and anything that could fall or emerge beyond the finished surface.
- Use the approved drilling equipment, dust controls, and work positioning. Confirm that the task can be completed without overreaching or placing another worker in the drilling path.
- Stop if the material or conditions differ from the plan. Report an unexpected void, obstruction, or service rather than forcing the tool through to keep the installation on schedule.
- Crew exercise: apply this discussion to one actual location in today's assignment. Describe the sequence from preparation through cleanup, identify who could be affected, and agree what must be in place before the first person starts. Use a drawing or a safe observation point; do not create an exposure for the demonstration.
- Make the decision practical: name the person who will resolve missing information and confirm the controls. If the planned conditions change, stop the affected activity and obtain a revised plan. At the next briefing, review whether the agreed action was completed and what the crew learned.
Ask the crew
- What is the most important hazard in our version of this task?
- What would make us stop and ask for a revised plan?
Before work starts
Identify one task-specific improvement, assign a responsible person, and confirm it is in place before the affected work begins.
Toolbox talk attendance & action record
Topic: Drilling walls: what is behind the mark?
Date: ____________________
Leader: ____________________
Company / jobsite: __________________________________________
Site hazards and controls discussed:
Follow-up action / responsible person / due date:
| Participant name | Signature / acknowledgment |
|---|---|
Attendance records document this discussion only; they do not certify competency or completion of required training. Complete this blank sheet after printing, or select “Start talk & collect signatures” above to create a private online attendance record.