General Load Chart: Manufacturer's operating notes supplied with the machine
contain important information concerning proper set-up, operation and additional
points that need to be considered when calculating load handling capacities
of cranes. Mistakes in calculating capacity can cause accidents.
Several factors to be considered when calculating a cranes load capacity, including the following:
Load Radius: the horizontal distance between the center of the crane rotation to center of gravity of the load.
Boom length: including the jib, swing away extension or any other attachments that may increase length of the boom.
Parts of line:
Quadrant of operation: the area of operation that the lift is being made in; note different quadrants usually have lower lifting capacities.
Boom angle: the angle formed between the horizontal plane of rotation and center line of the boom.
Weight of any attachments: jib, lattice extension or auxiliary boom point.
Weight of handling devices: ball, block, and/or any necessary rigging.