Throughout the machining shops, overhead electric cranes having capacities from 5 to30 tonnes, depending on the ship and material sizes, are normally used to transport platesand sections to each machine process. Individual machines may have jib cranes mountedon the frame that can be employed to handle the plate during the machining process.Distribution of plates in the shop may also be by means of conveyors or electricpowered trollies running on rails in bays between the plate working machines. Highlymechanized plant systems are also available where conveyor systems, flame cuttingtables, and aligning and clamping equipment are installed as integrated units.