MH model single beam gantry crane(box frame gantry crane) is matched with CD1 or MD1 model wire rope electric hoist, it is a kind of track travelling mid-duty type gantry crane, the main beam and legs are manufactured by plate steel, the frame is box frame, the capacity are from 3t to 32t, the span from 7.5m to 35m, the working temperature within -20--+42 centigrade, the duty class is A3~A4. This single beam gantry crane is commonly used gantry crane, it be used in outside warehouse for loading/unloading and lifting material. Both ground control and cabin control.