Why this matters
Take a few minutes before the task to cover Excavator Swing Radius. The main concern is workers crushed between counterweight and fixed objects, so make sure everyone sees the exposure and knows the plan before work begins. Heavy equipment injuries are rarely about speed alone. Blind spots, changing ground conditions, unexpected pedestrian movement and poor communication put people where operators cannot see them or cannot stop in time.
A scenario to discuss
While performing Excavator Swing Radius, the spotter steps away to handle another task and the operator can no longer see the full travel or swing area. Production is waiting. What is the correct response before movement resumes?
Before work starts
- Walk the equipment route and mark pedestrian separation, blind corners, edges and overhead hazards.
- Complete the operator/pre-use inspection and confirm seat belt, alarms, mirrors/cameras and controls are functional.
- Agree on spotter positions and the stop signal before the machine moves.
- Barricade or control the swing radius and pinch-point area.
- Keep ground workers out of the swing zone unless the operator has stopped and acknowledged them.
Common failure points
- Backing or swinging with a blind area that has not been cleared or controlled.
- Operating near edges/slopes/overhead hazards without a deliberate route and spotter plan.
- Assuming pedestrians will see or hear the machine and stay out of the way.
Safe work sequence / controls
- Barricade or control the swing radius and pinch-point area.
- Keep ground workers out of the swing zone unless the operator has stopped and acknowledged them.
- Plan spoil/loading locations so the machine does not repeatedly swing over workers.
- Use a spotter when clearance is limited and communication is reliable.
- If the setup changes or the control for workers crushed between counterweight and fixed objects is not working, stop the job and fix it before continuing.
Stop and reset the plan if...
- The operator loses a clear travel path, spotter communication or required visibility.
- Ground conditions, slope, overhead hazards or edge conditions are outside the planned operating limits.
- Pedestrians, vehicles or other trades enter the equipment operating zone unexpectedly.
Questions worth asking the crew
- What are the operator's blind spots in today's setup, and exactly where must pedestrians stay out?
- What ground, slope, edge, overhead, or clearance condition could put this machine outside its safe operating limits?
- When visibility is restricted, who is spotting and what exact signal means STOP?
- How does the risk change when the machine is loaded, backing, turning, or using the planned attachment?
- Has anyone had a pedestrian, blind spot or ground condition surprise an operator? What control would have caught it sooner?
Make it real on the job
Stand where a pedestrian could be missed and make sure the operator/crew understand that blind spot.
Close the talk
Before the crew starts, everyone should be able to explain the hazard, point to the control being used today, and name the condition that would make the work stop.
Related authoritative reference
29 CFR 1926.602 - Material Handling Equipment · Open reference ↗
This is a practical discussion guide, not a substitute for required training, a competent person, permits, manufacturer instructions, employer procedures, or applicable federal/state/local requirements. Adapt it to the actual task and conditions.
