... span structure,easy operation Introduction of electric double girder overhead cranes system1.Capacity:1- 250T2.Lifting mechanism: trolley/electric ... )7.Steel track recommended:QU70/80,p43 etcDouble girder cranes can provide more lift, because the hoist is placed ... in switching to double girders.Technical data of overhead cranes CapacityT50/1075/20100/20Spanm10.5~31.5Lifting heightMain hookm122022Aux. ...