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In this example, the load of concrete pipe is on the truck waiting to be set next to the trench. Before lifting a load with a crane, the operator must check the boom angle indicator, which will provide the angle of the boom from horizontal. You should never lift a load if the cable is at an angle.īy referring to the load chart, a crane operator can determine what angle the boom will have to be to ensure that he or she is directly above the load. If the load will be lifted from a point above ground level, you will also need to know from what height it will be lifted to ensure that the boom can be placed high enough above the load and still ensure a safe lift. One thing to remember is that if you are measuring from the front of the crane as is often done, be sure to add the distance to the center of the boom turntable. Before a lift can be made safely, the operator must know the weight of the load and how far the load is from the center of the boom turntable which is referred to as the load radius.
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This rule does not always apply to excavators. For example, the closer a crane is to the load and the higher the boom angle, the greater the lifting capacity. Although the basic concepts are the same, there are differences. For example, the weights of hooks, blocks, buckets, slings and other handling devices must be added to the load or deducted from the equipment lift capacity.Ĭrane load charts are different than excavator and backhoe load charts. Don’t forget to include adjustments for buckets, boom extensions, load blocks, hoisting rope and other attachments that will alter the lifting capacity of the crane or equipment used to perform the lift. The load charts are specific to the make, model and configuration of a specific piece of equipment.
#Crane lift charts manual#
Only load charts that are found in the equipment operation manual or posted by the manufacturer in the equipment should be used. Job specific training is required to ensure that operators are qualified to operate machinery. NOTE: This article is NOT intended to provide the necessary training required for operators or anybody responsible for lifting and rigging.
#Crane lift charts how to#
Before operating cranes or equipment, all operators must be fully trained in how to read and use the load charts and to safely operate the machine. This article is intended to provide operators and managers with a basic understanding of how to read and understand load charts. Operators will not have to be certified, but they still need to know how to use the appropriate load charts to ensure safe handling of loads. Although excavator and backhoes are exempt from the new rule, they will continue to be frequently used by underground utility contractors to lift pipe and materials.