The MG double-girder gantry crane, also known as the A or U-shaped double-girder gantry crane, is composed of the main girder, end girder, saddle, outriggers, lower crossbeam, trolley running mechanism, small trolley, electrical equipment and other parts. Lifting capacity: 5 to 200 tons, working environment: -20 to +40℃, working level: A1 to A8. The trolley of this crane is powered by flexible cables, while the large trolley is powered by sliding contact lines or cable drums. All mechanisms are operated from the driver's cab and are equipped with rainproof devices. It is applicable to the loading, unloading and handling of various materials in open-air warehouses, freight (material) yards, railway stations and port terminals. Features of this crane: The bridge frame adopts a box-type bridge frame structure, which is heavy in weight, relatively expensive, and has a large windward area. However, the crane has high strength and rigidity, a long service life, and runs smoothly. All mechanisms are equipped with safety protection devices. The cantilever length of the gantry crane is generally less than one-third of the span.