1999 KStreet

The 1999K Street office building in Washington D.C.’s central business district features several special facades. These include a lobby facade and several “screen walls“. The lobby facade consists of a post-and-beam construction in which the glass panes are attached to 6 m high glass swords. 1999K Street was planned by the architectural firm Jahn in Chicago, Werner Sobek was responsible for the structural and facade engineering.


Screenwalls with Specially Developed Supporting Structures

Special supporting structures were developed for the screen walls. With “coved” beams and filigree elements subject to tensile stress, they not only enable efficient load transfer, but at the same time lead to the greatest possible transparency.

Jahn, Chicago/USA

Planning time
2006 − 2007

Construction time
2007 − 2009

Services by Werner Sobek

  • Structural engineering
  • Facade planning for the special structures (WP 1 − 5 acc. to § 64 HOAI)

Vornado Realty Trust, New York/USA

Rainer Viertlböck, Gauting/Germany

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