YC upper rotary bridge crane mainly employs hung girder to hoist long objects like bilets, and is equipped with electromagnetic chuck to hoist. lt is composed of box-shaped bridge, crane crab, trolley travelling mechanism, cab and electric control system.It is also equipped with blackout magnetic system.

The girder is a middle-rail box girder, on which laid rails for crane crab to transversely move. The girder is weld with the box-shaped end girder. At the middle of the end girder are joints which are fastened with bots for fragmented transportation of bridges. The platform is used to place trolley traveling mechanism, electric equipment and for repair. Furnished with protection railing outside. The crane crab consists of upper crab and lower crab. The latter is traveling crab and the former is rotating crab. They are equipped with hosting mechanism and rotary mechanism, respectively. The upper crab is furnished with a circular orbit for rotating, which acts in concert with horizontal wheels to fulfill the purpose of rotating long articles.

The crane has slewing carrier-beam; is applicable to the fixed span at indoors oroutdoors ofsteel mill, yard and storage, etc. lt is used for loading, unloading and carrying steel plate, profile steel, and spool, etc. lt is especially applicable to lift material of different perfications and which needs horizontal rotation. The lower part ofthe carriler-beam can bring special lifting appliances, such as magnetic chuck and tongs, etc.