The suspension crane is a very good option for the handling in a column free space, or in a low hall, or in the case of large building spans, such as a hangar.
The single girder suspension crane requires very little space and runs on the bottom flange of the runway, which is mounted on roof beams or directly on the ceiling.  Meanwhile, the distance between the load hook and sidewall is extremely small, which make it possible to utilize almost full width of a building.