Crane load indicating device

Cranes may have built-in safety devices or warning devices. One type of device is a load indicating device (LID). It measures load weight and displays a reading for the operator. It may include an overload warning signal if a load exceeds some predetermined weight. 

Falling loads pose an extreme hazard to operators and nearby workers. Never exceed the load size and weight capacity of the crane. If you re unsure about your crane s capacity for size and weight, calculate the weight to ensure it meets the safety parameters. Load-indicating devices (called load moment devices) can prevent an accidental overload. Be sure to properly secure the loads to be lifted. Before the work begins, inspect the slings, chains, and hooks that will be used to lift and secure the load. 

Boom cranes have special safety devices for their unique hazards. One device is a boom angle indicator or boom radius indicator. A reading from this device provides the operator with information to help determine if a load is within safe Umits. There are also devices, called load-moment indicators, that combine boom angle and load. If there is a load with the boom set at a certain angle, the moment may exceed the allowed moment and cause a crane to tip over. The device sounds an alarm for the operator when approaching or exceeding the limit. 

B) Cranes with telescoping booms shall be equipped with a device to indicate clearly to the operator, at all times, the boom s extended length or an accurate determination of the load radius to be used during the lift shall be made prior to hoisting personnel. 

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