Casting bridge cranes are the main handling equipment for smelting workshop ofsteel works. They are used for conveying, pouring and hot metal charging of liquid metal in smeting process. Yzs casting bridge 

crane, adopting main crab and auxiliarycrab, and four-girder and four-rail structure, is composed of bridge, main crab, auxliary crab, connecting traverse, trolley travelingmechanism and electric part. 

The trolley travelling mechanism and main electric equipment are installed in the girder. The girder's electric panel roomemploysrock wool for heat insulation, and has an air cooler inside, To reduce heat 

radiation of molten steel to metalstructural membersa thermal baffle is set along the span direction at the bottom ofthe girder.

The trolleytravelling mechanism adopts four-corner drive.

The crane is equipped with a specialelectronic scale, and there are display devices in the cab and on the bridge. 

The main hoistingmechanism is furnished with an overspeed switch.