In multiple crane lifts, what is the maximum percentage of capacity each crane should not exceed?

In multiple crane lifts, it is essential to ensure that each crane operates within a safe limit to maintain stability and prevent accidents during the lift. The safest practice is to limit the load on each crane to a maximum of 75% of its rated capacity. This allows for a margin of safety that accounts for potential dynamic forces, load shifts, and the variations in capacity that can occur due to factors such as operator error, environmental conditions, and the mechanical wear of the cranes.

By adhering to this 75% guideline, the risk of overloading any one crane is minimized, which is crucial in a multi-crane operation where the interaction between cranes can create complex load dynamics. Additionally, keeping each crane at or below this percentage helps ensure that the overall structure being lifted remains stable and that the cranes can react appropriately if an emergency or unexpected situation arises during the operation. This level of caution is a fundamental aspect of safe rigging and lifting practices.