OSHA 10-Hour Construction ReviewFocus Four HazardsMedium
A worker is operating a bulldozer on a construction site. Another worker, acting as a spotter, is positioned near the path of the bulldozer to guide the operator. What is the minimum safe distance the spotter should maintain from the operating bulldozer's swing radius?
- AWithin the operator's line of sight, regardless of distance
- BOutside the swing radius, plus a safe clearance
- CAt least 5 feet
- DAt least 10 feet
Show answer & explanationAnswer & explanation
Correct answer: B. Outside the swing radius, plus a safe clearance
OSHA requires that workers, including spotters, remain clear of the operating equipment's swing radius to prevent 'struck-by' incidents. The 'safe clearance' adds an additional margin of safety beyond the absolute physical reach of the equipment.
Why the other options are wrong
- A. While line of sight is crucial for communication, it does not define a safe physical distance from moving machinery.
- C. 5 feet is generally insufficient for heavy equipment swing radii.
- D. 10 feet might be insufficient depending on the equipment size and swing radius.
Heavy Equipment Swing Radius Safety
Workers must maintain a safe distance from the swing radius of heavy equipment to prevent 'struck-by' injuries.
- Swing radius is the area where the equipment's moving parts can reach.
- Spotters and other personnel must stay clear of this zone.
- Barricades or warning lines may be used to define the safe zone.
Memory trick: Stay outside the swing, or feel the sting!