Referring to the load capacity of hooks, as the load is moved toward the tip, what happens to the SWL?

• A. It remains the same
• B. It increases
• C. It decreases
• D. It becomes unstable

Answer: (C)

When the load is moved toward the tip of a hook, the Safe Working Load (SWL) decreases. This phenomenon occurs due to the mechanics of leverage and the distribution of weight. As the load shifts closer to the tip, it creates a longer lever arm and places additional stress on the hook. The hook is designed to support a specified maximum load when the weight is centered and balanced. However, moving the load toward the tip can lead to an unstable situation, increasing the risk of the hook failing or the load slipping.

Maintaining the load as close to the center of the hook as possible ensures optimal weight distribution and supports the intended SWL. Therefore, understanding how the placement of the load affects the SWL is crucial for safe rigging practices in pipefitting and other applications involving lifting equipment.