What is the function of a spreader beam in rigging?

A spreader beam is primarily designed to help distribute the load evenly across multiple points, which is crucial for maintaining the stability of the load and ensuring safety during lifting operations. By using a spreader beam, the forces that are applied to the slings are balanced, minimizing side loading. Side loading can be detrimental as it can cause slings to fail or become damaged, leading to unsafe conditions. The spreader beam thus acts as a mediator, allowing for a more controlled and balanced lifting process which is especially important when handling wide or awkward loads. This functionality is critical in rigging scenarios where load integrity and safety are paramount.