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.
