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Iris hut

From Wikipedia, the free encyclopedia
Prefabricated steel structure developed by the British military

TheIris hut is a prefabricated steel structure used by the British military predominantly during the early part of theSecond World War. They served asbarracks, workshops, and storage facilities in World War IIGreat Britain.

Iris huts were also used as accommodation in thetunnels of Gibraltar, where they were situated in chambers excavated under theRock of Gibraltar.[1]

Architecture

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An Iris hut is constructed of a clamped tubular steel frame with a central entrance.[2]

The hut's mode of construction and dimensions are similar to those of theRomney hut, as was its purpose. Both were used to accommodate facilities for which abnormal roof spans were required.[3] On some airfields, two or more Romney or Iris huts would be erected to accommodate large stores and workshops.[4] However, the Iris hut had a major design flaw: it was unable to resist the weight of snow lying on the roof and had a tendency to collapse after snowfalls. For this reason, it was superseded by the Romney hut by 1941.[5]

Present day

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Surviving Iris huts are now rare due to their fragility.

Bicester

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Six original examples (along with six Romney huts) are still located at the Central Ordnance DepotBicester, part of the BritishMinistry of Defence's Logistic Services Bicester facility. The Bicester huts were completed by July 1944, by which time the design had been almost entirely phased out elsewhere. They were needed in connection withOperation Bolero, the build-up of U.S. forces in Britain for the campaign in Europe, which aimed to accommodate 1,446,000 U.S. service personnel on British soil by 30 April 1944. It resulted in "the greatest expansion of military infrastructure ever to occur in British history."[2] The troops were accommodated in 16-foot (4.9 m) wideNissen huts and their stores and workshops in 35-foot (11 m) wide Iris huts, manufactured in Britain frombillet steel imported from the United States.[6]

The huts at Bicester became surplus to requirements following the withdrawal of the bulk of the U.S. forces in early 1946 and most were demolished during the 1960s. It is unclear what the Iris huts were used for, but the presence of ventilated panels suggests that they were used to store flammable goods.[2]

See also

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References

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  1. ^Rose, Edward P.F. (2000). "Fortress Gibraltar". In Rose, Edward P.F.; Nathanail, C. Paul (eds.).Geology and Warfare: Examples of the Influence of Terrain and Geologists on Military Operations. Geological Society. p. 258.ISBN 9781862390652.
  2. ^abcHistoric England."Details from listed building database (1412391)".National Heritage List for England. Retrieved13 June 2013.
  3. ^The Civil Engineer in War: Airfields, Roads, Railways, and Bridges. Institution of Civil Engineers. 1948. p. 90.
  4. ^Smith, David J. (1981).Action Stations: Military airfields of Wales and the North-West. Stephens.ISBN 0850594855.
  5. ^Dobinson, Colin (2001).AA Command: Britain's anti-aircraft defences of World War II. Methuen. p. 325.ISBN 9780413765406.
  6. ^Beck, Alfred M. (1985).Technical Services, the Corps of Engineers, the War Against Germany. Government Printing Office. p. 52.ISBN 9780160019388.
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