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The single arch of the bridge has a span of 31.4 meters and a rise of 11.42 meters, which was unusually flat for the time. The structure features two different masonry techniques: the lower part is made of gneiss blocks, dry-laid, while the upper part is a superposition of layers made of gneiss flakes and lime, interspersed with bands of stone. [9]
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 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.
If the spandrel is solid, usually the case in a masonry or stone arch bridge, the bridge is called a closed-spandrel deck arch bridge. If the deck is supported by a number of vertical columns rising from the arch, the bridge is known as an open-spandrel deck arch bridge. The Alexander Hamilton Bridge is an example of an open-spandrel arch bridge.
Candidates are required to be Master Masons, Royal Arch Masons, and to believe in the Christian Holy Trinity. Members meet as a Conclave. The Order works three degrees, and also administrates two distinct appendant orders which are both Christian in character. The Order is administrated from Mark Masons' Hall, London.
A masonry arch may refer to: Triumphal arch , an architectural monument containing an arch, built from any variety of stone Arch bridge , a bridge constructed of masonry for pedestrian and / or vehicular traffic
A voussoir (/ v u ˈ s w ɑːr /) is a wedge-shaped element, typically a stone, which is used in building an arch or vault. [1] Although each unit in an arch or vault is a voussoir, two units are of distinct functional importance: the keystone and the springer. The keystone is the centre stone or masonry unit at the apex of an arch.
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 ...