Worksite Communication, Teamwork, Signage and Exclusion Zones
Communication is a control
Clear communication prevents collisions, dropped loads and crush injuries. Brief the team before the lift: roles, signals, radio channel, exclusion zone and emergency stop. Use standard hand signals or agreed radio calls. Confirm understanding by repeat-back. One person directs the lift; the operator stops for anyone who calls emergency stop.
Teamwork
Riggers, doggers, spotters and operators share responsibility. Speak up about hazards; a near miss is information. Fatigue, noise and distance degrade communication - use radios and repeat-backs.
Signage and exclusion zones
Exclusion zones keep people out from under and near the load. Mark them with barriers, tape, cones and signage. Signage must be visible, legible and understood; it does not replace physical barriers where risk is high. Pedestrian routes and traffic management plans keep people and vehicles clear.
Traps
Questions test whether signage alone is enough (usually not for high-risk lifts), whether an unauthorised person can signal, and whether the exclusion zone moves with the load. It does - the zone follows the load path, not just the crane.
Worked example
A gantry crane lifts over a walkway. You close the walkway, erect barriers and signage, brief the team, designate a signaler and spotter, and reopen only when the load is set down and the area is clear.
Rule of thumb
If someone can walk under the load, the exclusion zone has failed. Barriers first, signage second, briefing always.