Lift Execution and Supervision
Lift Execution and Supervision tests the sequence, communication, and stop-work judgment that turn a plan into a safe lift.
Before the load leaves the ground
Hold a pre-lift meeting with the operator, rigger, signal person, and supervisor. Confirm load weight, rigging, hitch, and balance; inspect slings and hardware; rig tag lines. The operator makes a test lift of a few inches to verify stability, brake holding, and rigging, then stops for inspection before continuing.
Signals and communication
Use one designated signal person and standard signals under ASME B30.5 and OSHA 1926.1411; anyone may give an emergency stop. Radio communication needs a dedicated channel, clear identification, and a confirmed understanding before movement. Never accept conflicting signals.
Controlling the load
Keep the load line vertical; side loading is outside the chart. Start and stop smoothly, avoid rapid swing and brake shock, and monitor boom angle, radius, and load moment indicator if fitted. Tag lines control rotation from outside the swing area; no one stands under the load or within the swing radius. Travel with a suspended load only where the manufacturer's chart and procedures expressly permit it; most lattice boom truck cranes require the boom lowered for travel.
Worked example
A load begins to drift as the operator swings. The correct action is to stop the swing, let the load settle, and use the tag line to control it-not to increase swing speed or reverse abruptly, which can side-load the boom.
Traps
Multiple signal givers; riding the load or hook; leaving a load suspended while taking a break; using boom hoist to drag a load; and continuing after an unexpected contact or shock load.