Make certain you know the area where the load will be lifted from, the area the load will pass through, and the area the load will be placed.īase lifting capacities on the area with the least load rating according to the working area chart. Over what operating areas will the load be handled? Working Area charts define specific areas of the crane that relate to loading ratings.Īreas such as Over the Side, Over the Rear, Over the Front, and 360-degree Rotation lead you to specific load charts. What are the boom and jib/extension configurations? If the lift will be made with an extension or jib you must locate the load chart that provides ratings for these accessory devices.How much counterweight is installed on the crane?.How is the crane configured? Are the outriggers fully extended and set, partially extended and set, or will the lift be made on rubber tires?.There is specific information you must obtain prior to attempting to lift a load. Load charts have become increasingly complex. The crane load chart in the mobile crane industry is long past the days of a single page load chart. You just have to know what you’re looking for. Similarly, certain information will always be located within a crane’s load rating chart and notes. You do this because you know these controls must exist to operate safely. You locate the speedometer and fuel gauge, then locate windshield wiper, outside mirror, and seat adjustment controls. Just as you may expect to find certain information when you enter an unfamiliar automobile. 4 How to calculate crane load capacity?Īn experienced crane operator enters the cab of an unfamiliar crane expecting to find certain information on the load chart.
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