Shipbuilding gantry cranes

Hull assembly for berth, wall mount jib crane standing with two lifting car: There are two main hook of a run on the track on the bridge flange; another has a main hook and an auxiliary hook, flange under bridge running on the track, in order to flip and hoisting large hull blocks. Weight is generally from 100 to 1500 tons; single girder bridge cranes span of 185 meters; lifting speed of 2 to 15 m / min, and 0.1 to 0.5 m / min jog speed