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Admiralty scaffolding

In this article we are going to explore the impact of Admiralty scaffolding on today's society. For decades, Admiralty scaffolding has been a topic of interest to academics, experts and the general public. Its relevance has been reflected in different areas such as politics, culture, economy and technology. Over time, Admiralty scaffolding has proven its ability to create meaningful change and provoke passionate debate. In this sense, it is essential to critically and objectively analyze the role that Admiralty scaffolding plays in our society and how it continues to shape our present and future.

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A drawing of Admiralty scaffolding from 1940
A section of Admiralty scaffolding prepared for testing
Extant remains at Salthouse, North Norfolk, England.
Exposed extant remains at Weybourne camp, North Norfolk, after the storm of October 2002

Admiralty scaffolding, also known as Obstacle Z.1, or sometimes simply as beach scaffolding[1] or anti-tank scaffolding,[2] was a British anti-tank and anti-boat obstacle design made of tubular steel. It was widely deployed on the beaches of southern England, eastern England and South West England during the British anti-invasion preparations of World War II,[3][4] though scaffolding was also used, but more sparingly, inland.[5]

Design and use

Of a number of similar designs, obstacle Z.1 was by far the most common. This design comprised upright tubes 9 feet (2.7 m) high and 4 feet 10 inches (1.5 m) apart, connected by up to four horizontal tubes. Each upright was braced by a pair of diagonal tubes, at approximately 45°, to the rear.[6] 20-foot (6 m) wide sections were assembled and carried to the sea to be placed in position at the half tide mark as an obstacle to boats.[6]

However, trials found that a 250-ton barge at 5+1⁄2 knots (6.3 mph; 10.2 km/h) or an 80-ton trawler at 7+1⁄2 knots (8.6 mph; 13.9 km/h) would pass through the obstacle unimpeded, and a trawler easily pulled out one bay with an attached wire rope.[7] Tests in October 1940 confirmed that tanks could only break through with difficulty. As a result, Z.1 was adopted as an anti-tank barrier for beaches thought suitable for landing tanks. As an anti-tank barrier, it was placed at or just above the high water point[6] where it would be difficult for tanks to gain enough momentum to break through. In some places, two sets of scaffolding were set up: one in the water against boats, and one at high water against tanks.[8]

The problem of securing the barriers on sand was overcome by Stewarts & Lloyds' development of the "sword picket"– This device was later known at the Admiralty as the "Wallace Sword".[7][9]

Barriers ranging in length from a couple of hundred feet to three miles were constructed, consuming 50% of Britain's production of scaffolding steel[6] at an estimated cost of £6,600 per mile[6] (equivalent to £460,000 today[10]). Despite this, many miles of Admiralty scaffolding were erected using more than 15,000 miles (24,000 km) of scaffolding tube.[9]

After the war, the scaffolding obstructed swimmers,[11][12] and was subsequently removed for scrap. Remaining traces are very rare, but occasionally revealed by storms.[13][14][15][16][17]

See also

References

Notes

  1. ^ "Beach Scaffolding". Online Thesaurus. English Heritage. Archived from the original on 18 July 2011. Retrieved 16 September 2010.
  2. ^ "Anti-tank Scaffolding". Online Thesaurus. English Heritage. Archived from the original on 18 July 2011. Retrieved 16 September 2010.
  3. ^ "The threat of invasion – June-September 1940". Retrieved 2 August 2010.
  4. ^ "Fear of Invasion – Beach Defences". Historic Cornwall. Cornwall Council – Historic Environment Service. Retrieved 4 August 2010.
  5. ^ Foot 2006, p. 11.
  6. ^ a b c d e Beach Scaffolding Defence; Trial – WO 199/1618. The Catalogue, The National Archives
  7. ^ a b "Scaffolding". Anti Invasion Defences of Suffolk. Archived from the original on 11 March 2012. Retrieved 30 August 2010.
  8. ^ Foot 2006, pp. 130–137.
  9. ^ a b Wills 1985, p. 42.
  10. ^ UK Retail Price Index inflation figures are based on data from Clark, Gregory (2017). "The Annual RPI and Average Earnings for Britain, 1209 to Present (New Series)". MeasuringWorth. Retrieved 7 May 2024.
  11. ^ Ann Broad. "Beach Scaffolding Makes for Difficult Swimming on the Sussex Coast". Walberswick Coastal Defences of World War II. Retrieved 4 August 2010.
  12. ^ Removal of Bathing Ban at Bournemouth. British Pathe. 1944. Retrieved 16 October 2016.
  13. ^ "Beach scaffolding – Lunan bay, Angus". pillboxesuk.co.uk. Archived from the original on 17 July 2010. Retrieved 4 August 2010.
  14. ^ "Beach Scaffolding, Pig's Bay to Wakering Stairs, Shoeburyness/Gt Wakering". Unlocking Essex's Past. Essex County Council. Retrieved 5 August 2010.[permanent dead link]
  15. ^ "WW2 Coastal Defences Salthouse, Kelling & Weybourne North Norfolk". Archived from the original on 15 August 2010. Retrieved 24 August 2010.
  16. ^ "Wartime Beach Defences are Revealed at Tregantle Beach, South East Cornwall in 1987/88". Cyber Heritage. Archived from the original on 25 January 2012. Retrieved 23 March 2012.
  17. ^ Ruddy 2003, p. 25.

General references

  • Foot, William (2006). Beaches, fields, streets, and hills ... the anti-invasion landscapes of England, 1940. Council for British Archaeology. ISBN 1-902771-53-2.
  • Ruddy, Austin (2003). British Anti-Invasion Defences 1940–1945. Official Handbook of the Pillbox Study Group. Historic Military Press. ISBN 1-901313-20-4.
  • Wills, Henry (1985). Pillboxes: A Study of UK Defences. Leo Cooper. ISBN 0-436-57360-1.

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