What does the term "shock load" mean in rigging?

The term "shock load" in rigging refers to an unexpected load that exceeds the normal working load. This situation arises when a load experiences a sudden and often significant increase in force, typically due to dynamic events such as a sudden stop, a drop, or a jerking motion. This type of load can arise in various scenarios, such as when a load being lifted encounters an obstruction or when a rigging system is suddenly released or stopped.

Shock loads can result in higher forces than the equipment is rated for, potentially leading to equipment failure or accidents. Understanding shock loads is crucial for riggers since it underscores the importance of properly assessing and managing loads, ensuring that rigging equipment has suitable safety factors to accommodate these unexpected forces. Proper techniques, such as using cushioning methods or maintaining control while lifting, are vital to mitigate the risks associated with shock loads.