Hook gantry crane is a u-shaped tube double slag according to the working condition of the use of underground construction requirements and, on the basis of general gantry crane developed special door crane, dedicated to flip down during the construction of underground soil and dispatching goods. Crane by car, the door frame, supporting institution, the institution consists of hydraulic station and double slag hook. Beam in the middle of a hook, commonly used for lifting objects. In the form of eight rounds of 4 x4 supporting institutions.Fixed in the car's motor by vertical reducer drive wheels, with wind clip rails, the normal work of the crane, clip of rail clamp left orbit, when the crane to stop working, the operator will clamp down, clamp orbit, to prevent sliding crane. Pour the soil direction according to the construction site. U-shaped hook gantry crane is suitable for open storage or along the railway general loading and unloading and lifting handling operations.With the special container spreader can do homework.U hook gantry crane By the door frame, supporting institutions, vehicles, electrical equipment, etc.Box welding structure is used in door frame cart running mechanism driven by respectively.All the agencies are controlling interior controlling.Conducting form points cable crane and sliding contact line two, choose a kind of when you order it.