MG model double girder gantry crane (heavy dMG model double girder gantry crane (heavy duty gantry crane) is applied in outside plant or railway sideways to conduct common lifting and loading unloading works. This double girder gantry crane is composed of two beams, four support legs, crane travelling systems, trolley and electric equipment. The beams and legs adopts box-type welding frame, the crane travelling mechanism adopts separate drive. All motions are operated in the drivers cabin or wireless remote control, the power supply of crane adopts cables or sliding wires, select one when ordering. The MG model double girder gantry crane is heavy duty type crane, the duty grade is A3~A7, the temperature of working environment within -25~+42 degree. The capacity from 5t to 250t, the span from 12m to 35m, the standard lifting height from 6m to 30m.