MG type double beam gantry crane project is mainly composed of the door frame, including cars, supporting institutions, cab and electrical control system Door frame for flower structure, with light structure, was strong, etc.Including main girder, the upper beam, leg and lower beam, travel car and walk the railing, etc.Girder using triangular flower structure, laying a track above, for lifting the car along the direction of the main girder lateral movement.Leg to the flower structure, by the steel compound.Walk for electrical equipment and maintenance, is equipped with protective railing.