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A jack arch, and a jack arch with a relieving arch above, as illustrated in the Lexikon der gesamten Technik The Mardin jack arch, view from the crypt underneath. A jack arch is a structural element in masonry construction that provides support at openings in the masonry. Alternate names are lintel arch, [1] flat arch and straight arch.
A typical true masonry arch consists of the following elements: [10] [11] [12] 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 ...
A masonry skew arch bridge photographed shortly after its completion in 1898, showing the helicoidal nature of its stonework. Sickergill Skew Bridge over the River Raven at Renwick, near Penrith. A skew arch (also known as an oblique arch) is a method of construction that enables an arch bridge to span an obstacle at some angle other than a ...
The Catalan vault (Catalan: volta catalana), also called thin-tile vault, [1] Catalan turn, Catalan arch, boveda ceiling (Spanish bóveda 'vault'), or timbrel vault, is a type of low brickwork arch forming a vaulted ceiling that often supports a floor above. It is constructed by laying a first layer of light bricks lengthwise "in space ...
A corbel arch is constructed by offsetting successive horizontal courses of stone (or brick) beginning at the springline of the walls (the point at which the walls break off from verticality to form an arc toward the apex at the archway's center) so that they project towards the archway's center from each supporting side, until the courses meet ...
In architecture, a vault (French voûte, from Italian volta) is a self-supporting arched form, usually of stone or brick, serving to cover a space with a ceiling or roof. [1] [2] As in building an arch, a temporary support is needed while rings of voussoirs are constructed and the rings placed in position
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 20th-century bracing arch in the background utilises modern bricks. Roman brick is a type of brick used in ancient Roman architecture and spread by the Romans to the lands they conquered, or a modern adaptation inspired by the ancient prototypes. Both types are characteristically longer and flatter than standard modern bricks.