The new building for the HDI-Gerling property insurance group is a reinforced concrete skeleton structure. Its individual six-storey office “fingers” are arranged around a central atrium. The bracing of the above-ground building complex was provided solely by the central access cores. The ceilings of the upper floors were designed as reinforced concrete flat slabs with thicknesses of 30 and 50 cm.
Optimal Structural Engineering for Maximum Transparency
For this purpose, the standard ceilings transverse to the span direction of the fingers and other areas with large spans were prestressed by means of monostrands without bond to limit deflection. To realise the 50 cm column offset of the standard office columns on the ground floor, intercepting structures in the ceiling above the ground floor were also used, prestressed by means of monostrands. The above-ground office fingers are arranged on a large-scale single-storey underground car park with maximum dimensions of approx. 160 x 160 m.
Ingenhoven Architekten, Düsseldorf/Germany
2008 − 2009
2009 − 2011
Services by Werner Sobek
Structural engineering for shell construction and special
structures (WP 1 − 8 acc. to § 64 HOAI)
AmpegaGerling Immobilien Management GmbH, Cologne/Germany
H.G. Esch, Hennef/Germany