In architecture, a corbel is a structural piece of stone, wood or metal jutting from a wall to carry a superincumbent weight,[1] a type of bracket.[2] A corbel is a solid piece of material in the wall, whereas a console is a piece applied to the structure. A piece of timber projecting in the same way was called a "tassel" or a "bragger" in England.[1]
The technique of corbelling, where rows of corbels deeply keyed inside a wall support a projecting wall or parapet, has been used since Neolithic (New Stone Age) times. It is common in medieval architecture and in the Scottish baronial style as well as in the vocabulary of classical architecture, such as the modillions of a Corinthian cornice. The corbel arch and corbel vault use the technique systematically to make openings in walls and to form ceilings. These are found in the early architecture of most cultures, from Eurasia to Pre-Columbian architecture.[note 1]
A console is more specifically an "S"-shaped scroll bracket in the classical tradition, with the upper or inner part larger than the lower (as in the first illustration) or outer. Keystones are also often in the form of consoles.[3] Whereas "corbel" is rarely used outside architecture, "console" is widely used for furniture, as in console table, and other decorative arts where the motif appears.
The word corbel comes from Old French and derives from the Latin corbellus, a diminutive of corvus ("raven"), which refers to the beak-like appearance.[1][note 2] Similarly, the French refer to a bracket-corbel, usually a load-bearing internal feature, as a corbeau ("crow").
Decorated corbels
Classical architecture
Corbel tables
Corbelling
Corbelling, where rows of corbels gradually build a wall out from the vertical, has long been used as a simple kind of vaulting, for example in many Neolithic chambered cairns, where walls are gradually corbelled in until the opening can be spanned by a slab.
Corbelled vaults are very common in early architecture around the world. Different types may be called the beehive house (ancient Britain and elsewhere), the Irish clochán, the pre-Roman nuraghe of Sardinia, and the tholos tombs (or "beehive tombs") of Late Bronze Age Greece and other parts of the Mediterranean.
In medieval architecture the technique was used to support upper storeys or a parapet projecting forward from the wall plane, often to form machicolation (openings between corbels could be used to drop things onto attackers). This later became a decorative feature, without the openings. Corbelling supporting upper stories and particularly supporting projecting corner turrets subsequently became a characteristic of the Scottish baronial style.
Medieval timber-framed buildings often employ jettying, where upper stories are cantilevered out on projecting wooden beams in a similar manner to corbelling.
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