Girder crane is a gantry crane specially designed for bridge construction. It is equipped with leg walking, crane walking and crane lifting equipment, which can realize all-round mechanized action. It is often used in conjunction with transporting girder vehicle and bridge girder erection machine to complete the laying of the bridge. The girder crane is used in the transportation of prefabricated beams of the bridge factories. The beam is lifted from the ground to the transporting girder vehicle, and then transported by the transporting girder vehicle to the bridge laying site. Finally, the prefabricated beams are transported by the bridge girder erection machine to the pier to complete the laying of the bridge. Besides, the girder crane can be used as lifting equipment to complete the assembly and disassembly of bridge girder erection machine, and can also be used to erectdrybridges withlowpiers. The girder crane usually adopts truss structure, mostly in the form of pergola gantry crane, which can be used to lift prefabricated beams with two girder cranes or with double slings for a single cranetolift prefabricatedbeams. The girder crane is mainly composed of assembled main girder, flexible legs, walking mechanism of cart, lifting mechanism, electric control system, hydraulic system, driver’s cab, railing bar, ladder, walking platform, special slings, etc. The components are connected by pins and high-strength bolts, which are easy to disassemble, assemble and transport. Compared with ordinary gantry crane, the installation is convenient, fast, economical and practical. It is suitable fortheconstructionofroadandbridgeconstructionunitsthatareconstantlyflowing.