What is the purpose of using a pendant line in crane operations?

Using a pendant line in crane operations is primarily intended to prevent line contact with structures. The pendant line serves to extend the reach of the main hoisting line, which helps keep the load away from obstructions like walls, scaffolding, or other structures. This added distance reduces the risk of snagging or causing damage to both the load and the surrounding environment, thereby enhancing safety on the job site.

While the other options might suggest alternative uses of lines in crane operations, they do not align with the specific purpose of a pendant line. For instance, increasing lifting capacity typically relies on the crane's rigging and design rather than the configuration of the lines. Measuring the weight of loads is generally done using scales or load cells specifically designed for that purpose, not by the use of a pendant line. Similarly, while load signaling is crucial for effective crane operation, it is managed through other dedicated means, such as hand signals or communication devices, rather than the pendant line itself.