Ship Building Gantry Crane is a special lifting device in ship building dock site. Ship Building Gantry Crane is with large tonnage in capacity and used in lifting huge structure of main hull. Weihua can manufacture DPT cranes form 50t+50t to 900t+900t in capacity. Ship Building Gantry Cranes trolleys can lifting hull structures separately or cooperatively.The distance of hooks of the two trolley can easily adjust in working. It’s adjustable manner make it lifting efficient.