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The keystone (shown in red) of an arch Dropped keystone at Colditz Castle. A keystone (or capstone) is the wedge-shaped stone at the apex of a masonry arch or typically round-shaped one at the apex of a vault. In both cases it is the final piece placed during construction and locks all the stones into position, allowing the arch or vault to ...
The keystone is the centre stone or masonry unit at the apex of an arch. The springer is the lowest voussoir on each side, located where the curve of the arch springs from the vertical support or abutment of the wall or pier. [1] The keystone is often decorated or enlarged.
Keystone or key-stone may refer to: Keystone (architecture) , a central stone or other piece at the apex of an arch or vault Keystone (cask) , a fitting used in ale casks
Keystone, the top block in an arch. Portion of the arch around the keystone (including the keystone itself), with no precisely defined boundary, is called a crown; Voussoir (a wedge-like construction block). A rowlock arch is formed by multiple concentric layers of voussoirs. [13] Extrados (an external surface of the arch)
For the sake of comparison, a semicircular arch with wedge-shaped voussoirs maintained by a central keystone ("true arch"). A corbel arch (or corbeled / corbelled arch ) is an arch -like construction method that uses the architectural technique of corbeling to span a space or void in a structure, such as an entranceway in a wall or as the span ...
Two rows of voussoirs form the shape of the arch and are held in place by a keystone at the top. [1] Above the arch (in two concentric rows) there is an ornate Doric-inspired frieze of metopes with round shields and triglyphs in six vertical bands. Above this is another smaller voussoir arch between two pilasters making the height of the ...
Keystone Mission is a 501 (c)(3) faith-based nonprofit that assists "homeless, hungry, and hurting people" in the Wilkes-Barre and Scranton areas.
In ecclesial architecture, it is also used of the area between the baluster of a Catholic church and the high altar (what is usually called the sanctuary or chancel). Peristyle A continuous porch of columns surrounding a courtyard or garden (see also Peristasis). In ecclesial architecture, the term cloister is used. Phiale