Concertina wire

Concertina wire
Concertinered razor wire

Concertina wire or Dannert Wire[1] is a type of barbed wire or razor wire that is formed in large coils which can be expanded like a concertina. In conjunction with plain barbed wire and steel pickets, it is used to form military wire obstacles.[2]

During World War I soldiers manufactured concertina wire themselves, using ordinary barbed wire. Today, it is factory made.

Contents

Origins

A sketch of a typical concertina wire obstacle
Concertina razor wire can be a feature of prisons.

In the First World War, barbed wire obstacles were made by stretching lengths of barbed wire between stakes of wood or iron. At its simplest, such a barrier would resemble a fence as might be used for agricultural purposes.[3] The double apron fence comprised a line of pickets with wires running diagonally down to points on the ground either side of the fence. Horizontal wires were attached to these diagonals.[3]

More elaborate and formidable obstructions could be formed with multiple lines of stakes connected with wire running from side-to-side, back-to-front and diagonally in every possible direction. Effective as these obstacles were, their construction took considerable time.

Barbed wire obstacles were vulnerable to being pushed about by artillery shells, and in the First World War this frequently resulted in a mass of randomly entangled wires that could be even more daunting than a carefully constructed obstacle. Learning this lesson, First World War soldiers would deploy barbed wire in so-called concertinas that were relatively loose. Barbed wire concertinas could be pre-prepared in the trenches and then deployed in no-man's-land relatively quickly under cover of darkness.

There was what might be called a concertina craze on: innumerable coils of barbed wire were converted into concertinas by the simple process of winding them round and round seven upright stakes in the ground; every new lap of wire was fastened to the one below it at every other stake by a twist of plain wire; the result, when you came to the end of a coil and lifted the whole up off the stakes was heavy ring of barbed wire that concertina'd out into ten-yard lengths.[4]

Concertina wire packs flat for ease of transport, but can then be deployed as an obstacle much more quickly than ordinary barbed wire.

A platoon of soldiers can deploy a single concertina fence at a rate of about a kilometer per hour. Such an obstacle is not very effective by itself, and concertinas are normally built up into more elaborate patterns as time permits.

Today, concertina wire is factory made and is available in forms that can be deployed very rapidly from the back of a vehicle or trailer.[5][6]

Dannert wire

Oil-tempered barbed wire was developed during the First World War; it was much harder to cut than ordinary barbed wire. During the 1930s, German Horst Dannert developed concertinas of this high-grade steel wire. The result was entirely self-supporting; it did not require any vertical posts.[7] An individual Dannert wire concertina could be compressed into a compact coil that could be carried by one man and then stretched out along its axis to make a barrier 50 feet (15 m) long and each coil could be held in place with just three staples hammered into the ground.[8]

Dannert wire was imported into Britain from Germany before the Second World War.[9] During the invasion crisis of 1940-1941, the demand for Dannert wire was so great that some was produced with low manganese steel wire which was easier to cut. This material was known as "Yellow Dannert" after the identifying yellow paint on the concertina handles. To compensate for the reduced effectiveness of Yellow Dannert, an extra supply of pickets were issued in lieu of screw pickets.[10]

Triple concertina wire

A barrier known as a triple concertina wire fence consists of two parallel concertinas joined by twists of wire and topped by a third concertina similarly attached. The result was an extremely effective barrier with many of the desirable properties of a random entanglement. A triple concertina fence could be deployed very quickly: it is possible for a party of five men to deploy 50 yards (46 m) of triple concertina fence in just fifteen minutes. Optionally, triple concertina fence could be strengthened with uprights, but this increases the construction time significantly.[8]

Constantine wire

Concertina wire is sometimes mistakenly called constantine wire. "Constantine" probably came from a corruption/misunderstanding of "Concertina" and led to confusion with the Roman Emperor Constantine. This in turn has led to some people trying to differentiate between concertina wire and "constantine" wire by assigning the latter term to what is commonly known as razor wire. In contrast to the double-helical construction of concertina wire, as shown being deployed by soldiers in the image, razor wire, or less commonly "constantine wire", consists of a single wire with projecting teeth periodically along its length.[11]

See also

References

Notes

  1. ^ "Dannert Wire". Online Thesaurus. English Heritage. http://thesaurus.english-heritage.org.uk/thesaurus_term.asp?thes_no=365&term_no=123440. Retrieved 18 September 2010. 
  2. ^ BARBED WIRE ENTANGLEMENTS.
  3. ^ a b Obstacles. Military Training Pamphlet No 30, Part III:. War Office. October 1940. 
  4. ^ Adams 1917, p. 269.
  5. ^ "Rapid Deployment Concertina Wire". Creative Building Products. http://www.soacorp.com/products_photos/ant_deployment_wire.htm. Retrieved 18 September 2010. 
  6. ^ Cobra Coil Rapid Concertina Wire Deployment System on YouTube
  7. ^ Dannert, Horst. Improvements in Barricades. British Patent No 480,082. 1937.
  8. ^ a b Construction of Dannert Concertina Wire Obstacles. Military Training Manual No 21A. War Office. September 1939. 
  9. ^ Metcalfe & Buchanan-Redden 1997, p. 4.
  10. ^ "Defence Works: Wire Obstacles". Anti-invasion defences of Suffolk: World War II. http://pillboxes-suffolk.webeden.co.uk/#/wire-obstacles/4537170353. Retrieved 19 September 2010. 
  11. ^ Photograph of Concertina wire labeled as Constantine Wire at BetterPhoto.com. Retrieved 2010-01-07.

General references

  • Adams, Bernard (1917). Nothing of Importance – A Record of Eight Months at the Front with a Welsh Battalion October 1915 to June 1916. Methuen & Co. 
  • Metcalfe, Robert W.; Buchanan-Redden, Jan (1997). No time for dreams: a soldier's six-year journey through World War II. General Store Pub House. ISBN 978-1896182797. 
  • Construction of Dannert Concertina Wire Obstacles. Military Training Manual No 21A. War Office. September 1939. 



Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • concertina wire — wire with razor sharp edges or projections, placed in coils as a barrier along the tops of fences or walls, as at a prison. Also called concertina, barbed tape, razor wire. [1925 30] * * * …   Universalium

  • concertina wire — noun see concertina I, 2 * * * wire with razor sharp edges or projections, placed in coils as a barrier along the tops of fences or walls, as at a prison. Also called concertina, barbed tape, razor wire. [1925 30] …   Useful english dictionary

  • concertina wire — /kɒnsəˈtin waɪə/ (say konsuh teen wuyuh) noun Military coiled barbed wire used for impeding the progress of intruders by entanglement. Also, concertina …  

  • concertina wire — concerti′na wire n. cvb bui wire with razor sharp edges or projections, placed in coils as a barrier along the tops of fences or walls …   From formal English to slang

  • concertina wire — noun Date: 1930 a coiled barbed wire for use as an obstacle …   New Collegiate Dictionary

  • concertina — 1835, from CONCERT (Cf. concert) + fem. ending INA (Cf. ina). Portable musical instrument invented 1829 by Sir Charles Wheatstone. Concertina wire attested by 1917, so called from similarity to the musical instrument …   Etymology dictionary

  • Concertina — This article is about the musical instrument. For the coils of barbed wire named after this instrument, see Concertina wire. For other uses, see Wiktionary:concertina. Concertina Wheatstone English concertina, circa 1920 …   Wikipedia

  • concertina — concertinist, n. /kon seuhr tee neuh/, n., v., concertinaed / neuhd/, concertinaing / neuh ing/, adj. n. 1. a musical instrument resembling an accordion but having buttonlike keys, hexagonal bellows and ends, and a more limited range. 2. See… …   Universalium

  • Wire obstacle — In the military science of fortification, wire obstacles are defensive obstacles made from barbed wire, barbed tape or concertina wire. They are designed to disrupt or delay an attacking enemy. Depending on the requirements and available… …   Wikipedia

  • concertina fence — looped barbed fence, barbed wire fence, concertina wire …   English contemporary dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”