Due to a lack of space in the existing ÖGK headquarters at Salzburg Central Station, an expansion of the dental outpatient clinic and the administration was carried out. For structural as well as technical reasons, it was decided to build over the underground parking ramps of the shopping center and the residential building, which allowed synergy effects to be exploited and prevented further ground works. In terms of urban planning, the project is positioned next to an existing 9 storey high-rise building which, due to the difficult ground conditions and the non-load-bearing capacity of the existing ramp structure, can only be implemented in lightweight construction from a structural point of view and was therefore erected as a timber hybrid high-rise building with a height of approx. 37 meters. The skeleton structure consists of glulam columns and a wood-concrete composite ribbed floor, whereby the purlin layer is bolted to a prefabricated, component-activated steel concrete slab and can be detached again. The nine floors cover an area of around 2,000 m². Approximately 450 m³ of glulam was used for the skeleton structure and the wood-concrete composite ribbed ceiling and given a white glazing surface finish. The components were delivered to the construction site in Salzburg virtually as a kit, already with all installation parts and fasteners.