The Unionhilfswerk Foundation is constructing a new administration building in Berlin. The office building has five upper floors and a basement.
The main structure was designed as a reinforced concrete skeleton construction with a bracing core. With ceiling spans between 5.8 and 8.1m, flat slabs can be realized economically. The vertical loads are transferred via reinforced concrete columns, core walls and a load-bearing masonry facade. The load-bearing outer facade is planned as a double-shell masonry wall with a load-bearing inner shell (42.5 cm) and a non-load-bearing outer shell (12 cm). A vertically perforated brick with a very low density of 550-600 kg/m³ is used.
The building bracing is provided by the continuous reinforced concrete cores. The building will be founded flat with a WU floor slab. The existing staircase will be extended with a two-story addition.