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U type material handling gantry crane usually have long crane span,heavy loading capacity,large rail distance between beams. This kind of structure is easier to lift big size heavy block material.
More stable, more safe, more efficiency.The crane is combined by the bridge, cart running mechanism, car and electrical equipment. Bridge with box welded structure, cart running mechanism driven respectively. Crane control have the ground operation, remote control and bridge operation. Crane electric power supply have cables and bus bar you can choose any one of when you order it. U type Large Span Gantry Crane have 10-35/10 tons capacity, working environment temperature is 25 ~ 40 ?.Overload capacity is strong, large working area, suitable for large span, heavy rail freight yard, port loading and unloading operation, open storage, container depot, etc.
link:http://www.chinacranemanufacturer.com/gantry-crane/double-girder-gantry-crane/u-type-large-span-dock-yard-material-handling.html
U Type Large Span Dock Yard Material Handling Gantry Crane Installation For Ship Building