Gantry crane use can be divided into three categories

Use can be divided into three categories:① cargo handling portal crane : mainly used in ports and open stockyard, handling with grab or hook. From the weight of not more than 25 tons, not with the magnitude of the change. Higher operating speeds, it is often an important indicator of productivity.② portal crane manufacturer， shipbuilding gantry crane: mainly used for berth, floating docks and outfitting scene, performed splicing hull, outfitting equipment and other lifting work, with a hook as a spreader. Maximum lifting capacity of 300 tons, from the weight of large amplitude is reduced accordingly. How stall lifting speed, light weight lifting when lifting speed can be increased. Some agencies also work with micro-devices to meet the installation requirements. Gantry height greater, can be adapted to the requirements of large lifting height and substantial job, but the operating speed is low, job productivity is not high.

③ construction and installation with portal cranes: mainly used in irrigation dam hydropower station, hoisting equipment and prefabricated parts, usually with hooks. From the weight and the operating speed is generally between two cranes before. It has good transport machine disassembly, spreader decentralization depth, can better adapt to temporary work and work on the bridge and other features.