Electromagnetic beam crane is mainly used for hoisting and transporting steel plate in shipyard. The safe working load of this crane including the weight of electromagnetic beam. This crane is constituted by girder, traveling mechanisms, lifting trolley, electric parts and electromagnet spreader. The electromagnetic suction force of this crane can last 10 minutes after power off. The SWL the crane ranges from (10 +10) tons to (60+60) tons, with work duty A6 and A7.