Single girder gantry crane 20t is medium and small type lifting equipment which runs at rails. It is mainly composed of gantry frame (girder, leg, lower cross beam, etc), hoisting mechanism, travelling mechanism and electric control part. With the electric hoist as hoisting mechanism, it runs along the lower flange of the I-steel of the girder.
MH model single girder gantry crane have box-shape structure and truss structure two kinds of gantry frame, the former have good techniques and easy fabrication, and the latter is light in dead weight and strong in wind resistance. The complete machine features light dead weight, simple structure and easy installation and maintenance, so that it is applicable to outdoor operational sites of medium and small lifting load for general handing such as factories and mines, freight yard and warehouses.