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The structure of ship building gantry crane has single girder type and double girder type.Ship building gantry crane steel structure is composed of gantry frame, up trolley,lower trolley,gantry travel mechanism,maintenance crane,elevator and electical devices.Accessory safety related devices suchas rail clamp,anchor,wind proof and lighting proof are provided. And traveling deviation correcting system is provided for longer span crane.

Referenced criterion and standards are as follows,GB/T8504-95 repair&building shipyard gantry crane technical criterion,GB/T14406-93 general gantry crane ,GB6067 lifting equipments safety regulation,GB3811-2008 crane design criterion.