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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 ...
Catnic Components had a patent for a steel lintel, used to provide structural support over a door or window opening in a brick wall. The lintel is hollow, being made from sheet steel pressed into a rectangular or trapezoidal shape with a wind to anchor the device to the surrounding brickwork. Part of the specification required a bar to "extend ...
However, lintels are subject to bending stress, while the flat arches are true arches, composed of irregular voussoir shapes (the keystone is the only one of the symmetric wedge shape), [86] and that efficiently uses the compressive strength of the masonry in the same manner as a curved arch and thus requires a mass of masonry on both sides to ...
Catnic was established in 1969 when Brian Robinson took his idea to entrepreneur Alfred Gooding.The company conceived, developed and pioneered the steel lintel designed for the house building industry, and soon won a major share of the UK market.
Many different building materials have been used for lintels. [3] In classical Western architecture and construction methods, by Merriam-Webster definition, a lintel is a load-bearing member and is placed over an entranceway. [3] The lintel may be called an architrave, but that term has alternative meanings that include more structure besides ...
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 of ...
Potential solution: Kenley Jansen, free agent RHP. The USA TODAY app gets you to the heart of the news — fast . Download for award-winning coverage, crosswords, audio storytelling, the ...
A formalized lintel, the lowest member of the classical entablature. Also the moulded frame of a door or window (often borrowing the profile of a classical architrave). Area or basement area In Georgian architecture, the small paved yard giving entry, via "area steps", to the basement floor at the front of a terraced house. Arris