abus overhead travelling cranes lift loads up to 100 tonnes swl and transport them to any point chosen within the building area. they are available in 4 different versions for a variety of applications: single girder cran......abus overhead travelling cranes lift loads up to 100 tonnes swl and transport them to any point chosen within the building area. they are available in 4 different versions for a variety of applications: single girder cranes, double girder cranes, underslung cranes and single girder wall travelling cranes.