The crab unit type DQA is characterised by an ultra-low headroom. This wire rope hoist design with a SWL of up to 40 t adapts to the building contours, even if there is very little clearance above it. The rope drum axis is aligned in the direction of cross travel. The articulated end carriage joints ensure positive contact of all four wheels with the track. The hoist trolley features two direct drive cross travel motors.