UNDERSTANDING LOAD DIAGRAMS FOR HIAB CRANE OPERATORS

Every HIAB model comes with lifting information you should familiarize yourself with. One key starting point is the LOAD CHART. While it might be obvious, understanding how to read this diagram is required for your crane operators’ training certification.

Load diagrams are graphs. They show the crane’s ability to handle a load in different positions. The numbers at the top of the graph show horizontal reach. The figures on the left side show the crane’s height or vertical reach from its mounted position. The figures at the bottom of the diagram are examples of load capacities at specific reaches.

The white area represents your crane’s working zone. The curves define the maximum load you can safely lift at a specific reach and height.

How to use a HIAB load chart to determine safe load capacity

Look at this load chart for a HIAB X-HiDUO 082E-2, for example.

To determine your maximum load capacity, follow the numbers at the top to a specific radius. Follow that graph line down to where it intersects with the hook height on the left side of the diagram. The intersection of those graph lines shows the position of the hook. Follow the graph lines to find the appropriate load capacity. If your hook lies between the bold lines of the graph, the lesser capacity is the maximum load. The net capacity is the maximum weight that can be lifted minus the weight of specific load-handling accessories, such as pallet forks or slings. This video will help you even further.

Whatever HIAB crane you choose, knowing your crane and understanding how to operate it will maximize productivity and protect you, your load and your equipment.