Exzenterhaus Bochum

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Height: Architectural 88.6 m / 291 ft
Height: Occupied 79.5 m / 261 ft
Height: To Tip 90.5 m / 297 ft
Height: Observatory 83.5 m / 274 ft
Floors Above Ground 25
Floors Below Ground 1
Tower GFA 10,400 m² / 111,945 ft²
Development GFA 12,450 m² / 134,011 ft²
# of Parking Spaces 120


Official Name Exzenterhaus Bochum
Structure Type Building
Status Completed
Country Germany
City Bochum
Street Address & Map Universitätsstraße 60
Postal Code 44789
Building Function office
Structural Material concrete
Construction Start 2009
Completion 2013

Companies Involved

Owner/Developer Exzenterhaus Bochum GmbH & Co. KG
Design Gerhard Spangenberg
Structural Engineer
Design Drees & Sommer Advanced Building; GuD Planungsgesellschaft für Ingenieurbau mbH; Schlaich Bergermann und Partner
MEP Engineer
Design HHP Nord / Ost; Ing. Büro Landwehr GmbH; Kleinmann Engineering GmbH
Project Manager Arte-Baumanagement GmbH
Other Consultant
• Wind Wacker Ingenieure
Material Supplier
• Cladding FKN - Fassaden GmbH & Co. KG

About Exzenterhaus Bochum

The Exzenterhaus is a major orientation point for the city of Bochum, Germany. Its shape, with 15 polycentric rings set atop the solid foundation of a 22-meter, World War-II-era bomb shelter, would probably make it a landmark at any height. Each floor contains rounded, rentable office space, offering 360-degree views and copious natural light through full-height windows and balconies up to 1.6 meters deep. Communicating spiral staircases between floors in single-tenant spaces are also an option. Further uses may include light displays and use as a projection screen.

The bunker shaft provides a two-story reception area at the base. The remaining bunker floors serve as archival and storage space. The structural design of the building is a tour-de-force. The concrete structure’s floor slabs cantilever up to 4.5 meters but are only 250 mm thick. This is supported by a conical spatial form activating membrane action in the slabs, as well as unbounded, pre-stressed tendons around the slab edges, to counteract cracking.

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