MGG road-bridge gantry crane is mainly used for bridge construction which is worked at a low rate. it is composed of gantry, wind lass crab, trolley traveling mechanism, cab and electric control system.

The gantry, of a truss structure and having advantages oflight structure, strong wind resistance and so on, is composed of girder,upper end girder, leg, lower end qirder, traveling trolley and platform railing. The girder is of a triangular truss structure, on which laid rails for crane crab to transversely move along the main girder, The legs are of a box structure or steel tube structure.

The crab is equipped with windlass, which is compact in structure and light in dead weight. The trolley traveling adopts cycloid gearspeed reducer, soft start motor, 4-wheel drive in 8 wheels, so that it can run steadily. The closed cab is employed for operation, where there are adjustable seat, insulating mat on the floor, toughened glass for the window, fire extinguisher, electric fan and auxiliary equipment such as air conditioner, acoustic alarm and interphone which can be furnished as required by users.