“The corbel arch and corbel vault use the technique [of corbelling] to make openings in walls and to form ceilings”. A corbelled (false) roof or vault and a corbelled arch are prototypes of their structural counterparts in the history of architecture.
The corbelled vault usually occurs in a form of an elevated roof constructed using horizontal and successive layers of stone slabs or bricks that gradually overlap each other, inwards. As a result of such a process, a false vault or dome is created. The top of the corbelled roof is closed with a single capstone which spans the remaining space or void between the overhung stone slabs. “[In the] technique of corbelling, […] rows of corbels deeply keyed inside a wall support a projecting wall or parapet” (“Corbel” 2021).
In turn, corbelled arches, like structural (true) arches, are also made of stone but do not use “a wedge-shaped voussoirs converging towards” (“Corbel arch” 2021). They are cut in one beam or stone slab, or several horizontal layers of stone. Accordingly, “a corbel arch is an arch-like construction method that uses the architectural technique of corbelling to span a space or void in a structure. […] Although an improvement in load-bearing efficiency over the post and lintel design, [corbelled] arches are not entirely self-supporting structures, and the [corbelled] arch is sometimes termed a false arch for this reason” (Ibid.)
Featured image: A corbelled (false) arch in the Royal Palace of Ugarit, Bronze Age Syria. Photo by Disdero (2005). CC BY 3.0. Photo and caption source: “Corbel arch” (2021). In: Wikipedia. The Free Encyclopedia.
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“Corbel arch” (2021). In: Wikipedia. The Free Encyclopedia. Available at <https://bit.ly/2SjnC83>. [Accessed 7th June, 2021].
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