What is the primary concern when luffing down during a multi-crane lift?

When luffing down during a multi-crane lift, the primary concern revolves around load capacity. Luffing refers to the action of raising or lowering a load while altering the angle of the crane's boom. When the cranes luff down, the effective angle of the load can change rapidly, which may impact how the load is balanced and the ability of each crane to support it safely.

If the load is luffed down too aggressively or without proper coordination among the cranes, it can lead to situations where the distributed load exceeds the safe lifting capacities of the cranes. This could cause potential overload situations, compromising safety and risking equipment failure. Therefore, ensuring that the coordinated efforts of all cranes maintain load capacity within safe limits is crucial during this maneuver to avoid accidents and maintain operational safety during complex lifts.

Maintaining awareness of how shifts in angle and load distribution affect the cranes' lifting capabilities is pivotal in executing a multi-crane lift successfully while minimizing risks.