Which device provides information about the crane's load moment?

Which device provides information about the crane's load moment?

• A. Load moment indicator
• B. Rated capacity limiter
• C. Anti-two-block device
• D. Lifting hook

Answer: (A)

The crucial idea is monitoring the load moment, which is the weight being lifted times the distance from the crane’s center of rotation to the load. A load moment indicator gives real-time information about this value, often displaying the current moment and warning as it approaches the crane’s safety limits. It uses inputs like load weight, radius, and boom configuration to compute the moment and helps the operator keep everything within safe operating ranges. The other devices serve different roles: a rated capacity limiter uses the moment information to prevent overloading by limiting operations, but it isn’t primarily a display of the moment itself; an anti-two-block device prevents the hook block from contacting the crane structure; and the lifting hook is just the connection point for the load.

The crucial idea is monitoring the load moment, which is the weight being lifted times the distance from the crane’s center of rotation to the load. A load moment indicator gives real-time information about this value, often displaying the current moment and warning as it approaches the crane’s safety limits. It uses inputs like load weight, radius, and boom configuration to compute the moment and helps the operator keep everything within safe operating ranges.

The other devices serve different roles: a rated capacity limiter uses the moment information to prevent overloading by limiting operations, but it isn’t primarily a display of the moment itself; an anti-two-block device prevents the hook block from contacting the crane structure; and the lifting hook is just the connection point for the load.