What type of loading is the application of horizontal force on a boom due to a load not directly underneath the hoist hook?

The application of horizontal force on a boom due to a load not directly underneath the hoist hook is referred to as side loading. In rigging and hoisting operations, side loading occurs when a load is placed in such a way that it creates a force that is perpendicular to the main axis of the boom or jib. This situation can arise when a load is lifted at an angle or off-center, causing additional stress and forces on the lifting equipment.

Understanding side loading is critical because it can lead to structural failure if the boom or supporting structures are not designed to handle such forces. Proper training and knowledge help riggers recognize when side loading might occur and implement necessary precautions, such as repositioning the load or using properly rated equipment, to mitigate the risks associated with this type of loading.