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Triodetic dome

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Type of geodesic structure
Cinesphere, an example of a Triodetic dome

A Triodetic dome is a type of geodesic dome whose space frame is constructed using Triodetic connectors, invented in 1955 by the Canadian Arthur E. Fentiman.

History

Bloedel Floral Conservatory, one of the earliest Triodetic domes

Triodetic connectors were invented in 1955 by the Canadian Arthur E. Fentiman (1918–93), and patented in 1958. The system was developed further by A. E. Fentiman's brother, Harold Gordon ("Bud") Fentiman (1921–86) and was in commercial use by 1960. Triodetic Structures Ltd was established in 1962 to market the system; the Fentiman family sold the company in 1977.

Description

The connector consists of a hub, usually of aluminium, with up to twelve slots into which tubes (the axial members) can be inserted. The assemblage is stabilized by a central bolt with a washer (through the middle of the hub). It is generally used with aluminium tubes, but stainless steel was introduced in 1966. The tubes do not require bolting or welding together, and the frame can be put together by non-specialists using basic equipment.

Various shapes in addition to domes are possible, including barrel vaults, pyramids and hyperbolic paraboloids. Recent applications of the system have included as foundations for building, which can function on permafrost.

Examples of Triodetic structures

Arts Centre Melbourne
Blue Mosque

Canada

United States

Elsewhere

See also

References

  1. ^ G. S. Ramaswamy, Mick Eekhout, G. R. Suresh. Introduction to space frames. In: Analysis, Design and Construction of Steel Space Frames, pp. 11–13 (Thomas Telford; 2002) doi:10.1680/adacossf.30145.0001
  2. ^ Maria Cook (13 July 2003). The Buckminster Fuller of Kanata. The Ottawa Citizen, p. C3
  3. ^ M. Y. H. Bangash, T. Bangash. Tension Structures. In: Elements of Spatial Structures – Analysis and Design, pp. 389–484 (Thomas Telford Publishing; 2003) doi:10.1680/eoss.31494.0012
  4. Z. S. Makowski (1993). Space structures – a review of the developments within the last decade. In: Space Structures 4: Proceedings of the Fourth International Conference on Space Structures, pp. 1–8 ( G. A. R. Parke, C. M. Howard, eds) ISBN 9780727749413 doi:10.1680/ss4v1.19683.0001
  5. New Products at the Building Exhibition. The British Aluminium Company, Ltd. Official Architecture and Planning 26 (11): 1163 (1963) JSTOR 44150714
  6. Charly Ligety (2021). A Fresh Look at Emergency and Rapid Shelter Solutions. Cityscape 23 (2): 459–72 JSTOR 27039974
  7. John Mitchell (4 May 2002). Vancouver blooms; Tropicial plants and birds flourish at Bloedel Floral Conservatory. Toronto Star, p. K18
  8. Glen Harrison (2015) . Rainbow Stage, The Canadian Encyclopedia
  9. Ontario Place. The Canadian Architect 62 (5): 68 (2017)
  10. G. Holdsworth (1979). Installation of a Dome Shelter on Mount Logan Yukon Territory. Arctic 32 (1): 33–41 JSTOR 40508940
  11. Beth Kapusta, John McMinn (2001). Engineering Canadian Modernism. The Canadian Architect 46 (4): 10–13
  12. Unique structure. Daily Commercial News and Construction Record 79 (140): 2 (2006)
  13. Roman Catholic Church of St Joseph, National Heritage List for England, Historic England (accessed 26 November 2023)
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