Architectural challenge

While the roof ceiling is designed as a reinforced concrete flat ceiling with spherical hollow bodies for weight reduction, the false ceiling is constructed as a combination of steel and wood supporting elements. The steel girders are suspended from the solid roof with steel rods and cross-plywood panels stretched between them. In order to meet the high architectural demands, the two-storey concrete columns are designed as slim, highly reinforced spun concrete columns. The existing reinforced concrete walls and an X-bracing made of concrete are used for bracing. The existing garage underneath the library building was strengthened statically, among other things, with CFRP slats and underground DSV bodies.