The thermal baths with sauna, fitness and wellness area replaces a thermal bath from the early 1970s, which had to give way due to functional and technical defects.
The roof of the bathing hall consists of a pointtype supported oval biaxial spanning steel girder grid made of rolled profiles. The load-bearing roof shell was made of three-layer wooden panels and the roof edges cantilevered over the facades were realized with steel cantilever beams. The steel girder grid was mounted on slender steel tube supports and tied to the reinforced concrete roof slab of the adjoining building. The sauna area and the two-storey functional building with the changing, shower, wellness and fitness area were constructed as reinforced concrete solid structures consisting of flat slabs, wall panels and slender steel composite columns. The swimming pools were constructed as reinforced concrete tubs in a waterproof design and additionally sealed with a crack-bridging mineral sealing slurry. The indoor pools were separated from the pool slab by console supports to minimize the constraint stresses on the waterproof components. The outdoor pools made of stainless steel were founded on drilled piles in the load-bearing Lahn gravel, thus minimizing the structural settlements. The basement floors of the bathing hall were designed as a rigid reinforced concrete box in a waterproof construction. Due to the high design water level, additional tieback piles had to be installed under the floor slab to prevent uplift. The basement ceiling is supported by slender reinforced concrete columns, so that the service area is only slightly restricted.
