What is the term used to describe a sudden or unplanned loading of the crane that increases the stress on rigging and the load?

The term that describes a sudden or unplanned loading of the crane, which increases the stress on rigging and the load, is shock loading. This occurs when a force is applied quickly and unexpectedly, such as when a load falls or is dropped. Shock loading can significantly exceed the normal operational loads and can lead to failure of rigging components or other parts of the lifting system due to the rapid change in load conditions.

Understanding shock loading is crucial for ensuring the safety and integrity of lifting operations. It emphasizes the importance of using appropriate rigging techniques and equipment designed to withstand such unexpected forces. In contrast, cyclic loading refers to repeated loading and unloading over time, while dynamic loading involves forces that change with time but may not necessarily be sudden. Static loading, on the other hand, refers to loads that are constant and not changing, thus not related to sudden or unplanned forces affecting the rigging or load.