What happens to the links of a chain if they are overloaded?

When a chain is overloaded, the most common observable effect is that the links will elongate due to the excessive force being applied. This stretching occurs because the material of the chain is being pushed beyond its intended capacity. As the links are pulled, the shape can become distorted, sometimes resembling figure eights or other unusual forms, depending on the severity of the overload and the type of load applied.

This elongation is a critical safety concern, as it can indicate that the chain is compromised and may fail under load if not addressed. The chain’s ability to bear weight effectively diminishes, which underscores the importance of adhering to the manufacturer's rated load limits for safety during hoisting and rigging operations.