The construction of the office towers represented the last stage in the completion of the station. Both buildings are 46 metres high and thus higher than the nearby Federal Chancellor's Office with a height of 36 metres. The arched structures tower above the east-west glass roof of the station, forming arches across the tracks.

Zoom in to start a simulation of the tilting manoeuvre

Enlarge image: Zoom in to start a simulation of the tilting manoeuvre

First, two bracing cores on both the south side and the north side rised to a height of some 48 metres. The steelwork for the seven-storey high towers were then added, on which the half sections of the arches were to be placed vertically, resulting in a total height of 70 metres. In this construction phase, the structures resembled bascule bridges with their arms in the raised position ready to be swung downwards in a spectacular tilting manoeuvre and secured in position over the east-west roof.

Enlarge image:

Between them, the arched structures support another glass roof, the north-south roof of the station hall. The east-west roof was intersected at an oblique angle by the 210-metre long and 42-metre wide north-south roof. At the intersection point of the two roofs, a flat cupola was built. The two arched structures comprising a total of 12 storeys, which have been designed for office use, provide some 50,000 square metres of gross surface area.