Toolbox Talk - Heavy Machine Communication and Flagmen

In South Africa, struck-by accidents account for nearly 1 in 3 construction injuries. Poor communication and blind spots around heavy machinery are leading causes. Using spotters and clear signals saves lives.

Key Points

1. Blind SpotsHeavy machinery has large blind spots.
2. If you can’t see the operator, the operator can’t see you.
3. Use of Flagmen/SpottersA flagman directs the movement of machinery and traffic around the site.
4. Must use standard hand signals or radios for clear communication.
5. Should always wear high-visibility clothing.
6. Communication RulesAgree on signals before work starts.
7. Never assume the operator sees you — wait for acknowledgement.
8. Radios are preferred over mobile phones on site — instant, reliable, and hands-free.
9. Safety RemindersKeep safe distance from operating machinery.
10. Do not walk behind moving equipment unless cleared by the flagman.
11. Operators must stop work if communication is lost.

Real Example

On many sites, workers have been struck because they entered a machine’s blind spot without signaling. With a spotter in place, these incidents are preventable.

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