(In co-operation with Foster and partners, Architects and Designers, London) - With its lightweight lens-shaped curved facades, the high rise appears as a prominent landmark, easily visible above the city from some distance. The stacked arrangement of the floors imposes its rhythm on the external appearance of the building. Each group of six purely office floors is separated from the next by a twostorey garden and one of the local building services areas. In total there are 32 storeys. A second glass skin was constructed in front of the inner façade.
In the intermediate space of this double façade, there is a ventilation chamber extending over seven storeys, which provides natural thermal air movements. All offices have opening windows. The core areas at each end are clad with external ceramics panels, and between are the transparent glazed office and garden floor zones. The division of the office units produces arrangement with a high degree of reversibility. Open internal staircases link a maximum of three office storeys, each floor having a connection to a maximum of one stairway. This allows short cuts to be used even within large departments.