Engineering:Saddle roof

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Short description: Type of roof structure
The hyperbolic paraboloid is a doubly ruled surface and thus can be used to construct a saddle roof from straight beams.

A saddle roof is a hyperbolic paraboloid structure used as a roof. The form follows a convex curve about one axis and a concave curve about the other.

It is easily constructed from straight sections of lumber, steel, or other conventional materials.[1] The saddle roof may also be formed as a tensegrity structure.[2]

The term is used because the form resembles the shape of a saddle. Mathematically, a saddle shape contains at least one saddle point.

The historical meaning is a synonym for a gable roof, particularly a dual-pitched roof on a tower, also called a pack-saddle roof.[3]

File:Hyperbolic paraboloid.stl

Other examples

  • Philips Pavilion Expo '58, Brussels (1958)
  • IIT Delhi - Dogra Hall Roof
  • St. Mary's Cathedral, Tokyo, Japan (1964)
  • St Richard's Church, Ham, in Ham, London, England (1966)
  • Cathedral of Saint Mary of the Assumption, San Francisco, California, US (1971)
  • Scotiabank Saddledome in Calgary, Alberta, Canada (1983)
  • Scandinavium in Gothenburg, Sweden (1971)
  • L'Oceanogràfic in Valencia, Spain (2003)
  • London Velopark, England (2011)
  • Waterworld Leisure & Activity Centre, Wrexham, Wales (1970)
  • Markham Moor Service Station roof, A1(southbound), Nottinghamshire, England
  • Cafe "Kometa", Sokol district, Moscow, Russia (1960). Architect V.Volodin, engineer N.Drozdov. Demolished.
  • Warszawa Ochota railway station, an example of a hyperbolic paraboloid structure
    Warszawa Ochota railway station, an example of a hyperbolic paraboloid structure
  • Surface illustrating a hyperbolic paraboloid
    Surface illustrating a hyperbolic paraboloid
  • Restaurante Los Manantiales, Xochimilco, Mexico
    Restaurante Los Manantiales, Xochimilco, Mexico
  • Hyperbolic paraboloid thin-shell roofs at L'Oceanogràfic, Valencia, Spain (taken 2019)
    Hyperbolic paraboloid thin-shell roofs at L'Oceanogràfic, Valencia, Spain (taken 2019)
  • Markham Moor Service Station roof, Nottinghamshire (2009 photo)
    Markham Moor Service Station roof, Nottinghamshire (2009 photo)

See also

References

  1. ↑ A Dictionary of Architecture, Fleming, Honour, Pevsner
  2. ↑ Membrane Structures: Understanding Their Forms, Prof. Dr. Eng. M. Mollaert
  3. ↑ Passmore, Augustine C.. "Saddle Roof". Handbook of technical terms used in architecture and building and their allied trades and subjects,. London: Scott, Greenwood, and Co.;, 1904. 303. Print.




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