For duty cycle operations like skipping concrete, by what percentage must a crane's load chart capacity be reduced?

In duty cycle operations, such as skipping concrete, the dynamic effects and additional stresses placed on the crane require a reduction in the crane's load chart capacity to ensure safety and stability. The correct choice indicates that capacity must be reduced by 20%. This reduction accounts for the inherent risks and operational changes involved in these types of tasks, which can place different demands on the equipment compared to standard lifting operations. By implementing this reduction, operators help to prevent overload situations, which can lead to equipment failure or accidents. Understanding this principle is crucial for ensuring safe crane operations, especially in complex or variable loading conditions encountered during duty cycle work.