What is a "spreader bar," and why is it used in rigging?

A spreader bar is an essential component in rigging, utilized primarily for the purpose of load distribution. Its design allows it to provide an even spread of the load across multiple lifting points, which is crucial for maintaining stability and safety during a lift. By distributing the weight of a load evenly, the spreader bar helps to prevent excessive stress on any single point of attachment, reducing the risk of equipment failure or accidents that can occur if a load is improperly balanced.

When lifting heavy or wide loads, such as beams, pipes, or industrial equipment, utilizing a spreader bar can greatly enhance safety and efficiency. It allows the lifted item to hang evenly, promotes a more controlled lift, and minimizes the risk of tipping or swaying. In situations where a load has an uneven weight distribution or unique shape, the effectiveness of a spreader bar becomes even more significant.

In contrast, devices like those for lowering loads quickly or measuring load weight serve different purposes in rigging operations and do not contribute to load distribution.