Stuttgart Main Station (S21)

The project “Stuttgart 21” includes various building developments in the city of Stuttgart. This includes new construction of an underground train station with 8 tracks as well as a re-furbishment of the subway station “Staatsgalerie”, the partial demolition of the amendments to the old station, new design of plazas and accesses around the station as well as the re-development of the historical Bonatz Building. The new underground station, which is developed in the course of the project “Stuttgart 21”, consists of a hall, approx. 447 m in length and 80 m in width. The roof structure of the hall consists of a shell structure which is supported by chalice-shaped columns made of concrete. These create a horseshoe-shaped support of the flat roof parts. The freeform structural shell columns are opened upwards and are covered by filigree steel-glass structures. A very interesting video about the complex requirements of planning and realization of the shell columns can also be found at the following link:

tuttgarter Hauptbahnhof Stuttgart 21 Kelchstützen

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Ingenhoven Architects, Düsseldorf/Germany

Planning time
2010 − 2020

Construction time
2011 − 2025

Services by Werner Sobek
Structural engineering of the station (WP 4 − 6, 7 + 8 acc. to HOAI/Design development through site supervision)
Facade engineering (construction design)

50,000 m²

DB Projektbau GmbH, Stuttgart/Germany

Ingenhoven Architects, Düsseldorf/Germany
Werner Sobek, Stuttgart/Germany
HG Esch, Hennef/Germany
Achim Birnbaum, Stuttgart/Germany
Aldinger und Wolf, Stuttgart/Germany
Peter Wels, Hamburg/Germany

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