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Base of 30 St Mary Axe, London, UK
MyZeil, Frankfurt, Germany
CCTV Headquarters, Beijing, China

The diagrid (a portmanteau of diagonal grid) is a framework of diagonally intersecting metal, concrete or wooden beams that is used in the construction of buildings and roofs.[1] It requires less structural steel than a conventional steel frame. Hearst Tower in New York City, designed by Norman, Lord Foster, uses 21 percent less steel than a standard design.[2] The diagrid obviates the need for columns and can be used to make large column-free expanses of roofing.[3] Another iconic building designed by Lord Foster, 30 St Mary Axe, known as "The Gherkin", also uses the diagrid system.

British architect Ian Ritchie wrote in 2012:

Buildings utilizing diagrid[edit]

See also[edit]


  1. ^ Ian Volner (5 October 2011). "Dissecting Diagrid". Architect. American Institute of Architects. Archived from the original on 19 November 2011.
  2. ^ David W. Dunlap (7 October 2004). "Hearst Tower Echoes Trade Center Plan". The New York Times. Retrieved 1 December 2015.
  3. ^ Terri Meyer Boake (23 January 2014). Diagrid Structures: Systems, Connections, Details. Birkhäuser. pp. 13–. ISBN 978-3-03821-482-3.
  4. ^ Ian Ritchie (13 March 2012). "Diagonal Structures, Diagrid Structure". e-architect. Retrieved 1 December 2015.