Weight of the Headache ball or overhaul ball.The Gross Capacity must include the weight of anything and everything that is mounted or stowed on the boom of the crane or hanging from the boom tip. The maximum load must never exceed the crane's Net Capacity! The actual load the crane can lift is referred to as the 'Net Capacity'. The values given in the charts are 'Gross Capacities' or 'Rated Capacities'. The capacities listed in a cranes load chart are not the actual loads that can be lifted on the hook. The 'Stowed jib deductions' row is what you would deduct if the jib was stowed on the base of the boom for the particular boom length. The gross capacity of this crane can be determined by either following the radius column and interesting boom length, or following the boom angle column and intersecting the radius or boom length column. Loaded boom angle (means the boom's angle and radius is being measured with the boom loaded with the weight indicated in the chart)

The numbers in the left column represent operating radius The numbers on top row represent boom lengths of the crane This chart illustrates the gross or rated capacities of a crane. Ignoring these differences may lead to the overturning or structural failure of the crane. Whether you are operating a boom truck such as a Terex, National, Manitex, Pioneer, or Altec, a rough terrain crane such as a Grove, Link-Belt, Manitowoc, Kato, or Tadano, it is important to keep in mind that though many cranes have similarities in their load charts, they also have many differences. With all of the different crane manufacturers out there, it is imperative that the crane's load chart be well understood. A crane's load chart is the most important resource a crane operator should know for ensuring crane safety, and for determining what a particular crane is capable of lifting.

Crane lifting chart