... double girder overhead crane 1.CE,ISO9001,ISO14001,OHSAS18001 2.Span:7.5-31.5m 3.1 year warranty for mechanical probl LHTG20T double girder overhead ... quality and high-performance work from the car and double girder crane design and high-speed operation 4.Light weight, ... When make inquiry, capacity, crane type(single girder or double girder),length(can omit if the vertical girder is provided by buyer), ...