On both ends of the bridge by running the device directly support in the elevated bridge type crane on the tracks

On both ends of the bridge by running the device directly support in the elevated bridge type crane on the tracks, referred to as the "bridge crane". Shaped like a two-terminal bracing in overhead gantry crane parallel two overhead orbit running single span slab bridge. Lifting mechanism is used for vertical lifting objects, the classification of the bridge crane, gm bridge crane. To grab bridge crane are gm bridge crane. Grab bridge crane, laying track crane truss string directly. The construction bridge gantry crane shall be the same as the continuous crane beam. Heavy duty crane beam, the flange and the column or brake on bit plane passing horizontal force of friction type appropriate USES high strength bolt connections, and BuYi flange connection with brake beam, friction type high strength bolt connection can be used or weld connections.