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- Jack_arch abstract "A jack arch is a structural element in masonry construction that provides support at openings in the masonry. Alternate names are "flat arch" and "straight arch". Unlike regular arches, jack arches are not semicircular in form. Instead, they are flat in profile and are used under the same circumstances as lintels. Unlike lintels, which are subject to bending stress, jack arches are composed of individual masonry elements cut or formed into a wedge shape that efficiently uses the compressive strength of the masonry in the same manner as a regular arch. Like regular arches, jack arches require a mass of masonry to either side to absorb the considerable lateral thrust created by the jack arch.Jack arches have the advantage of being constructed from relatively small pieces of material that can be handled by individuals, as opposed to lintels which must necessarily be monolithic and which must be oversized unless reinforced by other means.In small-scale brick masonry projects, jack arches are typically sawn from an appropriately sized fired-clay lintel, giving a more precise and consistent joint width than field-sawn shapes. There is considerable scope for incorporation of decorative patterns and elements into jack arches. Keystones, stepped or arched top profiles, and polychrome or contrasting colors and materials may all be used to create the desired effect.One of the earliest jack arches is in the Deir-Al-Zafaran monastery in eastern Turkey, near Mardin. The floor of the chapel (and the roof of the crypt) is formed from a jack arch and is said to have been constructed in the centuries BC.".
- Jack_arch thumbnail L-Entlastungsbogen.png?width=300.
- Jack_arch wikiPageID "12225857".
- Jack_arch wikiPageLength "2526".
- Jack_arch wikiPageOutDegree "9".
- Jack_arch wikiPageRevisionID "608323140".
- Jack_arch wikiPageWikiLink Arch.
- Jack_arch wikiPageWikiLink Category:Arches_and_vaults.
- Jack_arch wikiPageWikiLink Category:Masonry.
- Jack_arch wikiPageWikiLink Keystone_(architecture).
- Jack_arch wikiPageWikiLink Lintel.
- Jack_arch wikiPageWikiLink Masonry.
- Jack_arch wikiPageWikiLink Polychrome.
- Jack_arch wikiPageWikiLink File:L-Entlastungsbogen.png.
- Jack_arch wikiPageWikiLink File:Mardin-arch.jpg.
- Jack_arch wikiPageWikiLinkText "Jack arch".
- Jack_arch wikiPageWikiLinkText "flat arch".
- Jack_arch wikiPageWikiLinkText "flat arches".
- Jack_arch wikiPageWikiLinkText "jack arch".
- Jack_arch hasPhotoCollection Jack_arch.
- Jack_arch wikiPageUsesTemplate Template:Cite_book.
- Jack_arch wikiPageUsesTemplate Template:Commonscat.
- Jack_arch wikiPageUsesTemplate Template:Reflist.
- Jack_arch subject Category:Arches_and_vaults.
- Jack_arch subject Category:Masonry.
- Jack_arch hypernym Element.
- Jack_arch type Article.
- Jack_arch type MilitaryUnit.
- Jack_arch type Article.
- Jack_arch type Element.
- Jack_arch comment "A jack arch is a structural element in masonry construction that provides support at openings in the masonry. Alternate names are "flat arch" and "straight arch". Unlike regular arches, jack arches are not semicircular in form. Instead, they are flat in profile and are used under the same circumstances as lintels.".
- Jack_arch label "Jack arch".
- Jack_arch sameAs Arco_adintelado.
- Jack_arch sameAs Plate-bande_(architecture).
- Jack_arch sameAs Piattabanda.
- Jack_arch sameAs Hanenkam_(metselwerk).
- Jack_arch sameAs m.02vwl15.
- Jack_arch sameAs Q1894772.
- Jack_arch sameAs Q1894772.
- Jack_arch wasDerivedFrom Jack_arch?oldid=608323140.
- Jack_arch depiction L-Entlastungsbogen.png.
- Jack_arch isPrimaryTopicOf Jack_arch.