Technical information

Definition of a "critical lift"

A none-routine crane lift requiring detailed planning and additional or unusual safety precautions

Critical lifts include:

lifts made when the load weight is 75% or more of the rated capacity of the crane; lifts that require the load to be lifted, swung or placed out of the operators view; of lifts made with more than one crane;
lifts using more than one hoist; lifts involving none-routine or technically difficult rigging arrangements: hoisting personnel with a crane or derrick;
lifts involving hazardous materials (e.g., explosives, highly volatile substances); lifts involving submerged loads; lifts without the use of outriggers
using on-rubber load charts; lifts where the centre of gravity could change; or any lift that the crane operator believes should be critical.