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Keystone module. A keystone module is a standardized snap-in package for mounting a variety of low-voltage electrical jacks or optical connectors into a keystone wall plate, face plate, surface-mount box, or a patch panel. Keystone modules have a rectangular face of 14.5 mm wide by 16.0 mm high and are held in place with flexible tabs.
Keystone (architecture) 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 bear weight. [1][2][3] In arches and vaults (such as ...
A voussoir (/ vuˈswɑːr /) 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.
Designated NHL. May 28, 1987 [ 4 ] The Gateway Arch is a 630-foot-tall (192 m) monument in St. Louis, Missouri, United States. Clad in stainless steel and built in the form of a weighted catenary arch, [ 5 ] it is the world's tallest arch [ 4 ] and Missouri's tallest accessible structure.
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)
In Canada, the first phase of Keystone involved the conversion of approximately 864 kilometres (537 mi) of existing 36-inch (910 mm) natural gas pipeline in Saskatchewan and Manitoba to crude oil pipeline service. It also included approximately 373 kilometres (232 mi) of new 30-inch-diameter (760 mm) pipeline, 16 pump stations and the Keystone ...
Corner blocks are used to join the corners of a soft-cover flat. They are normally made of 1 ⁄ 4 -inch (6.4 mm) plywood, and are triangles with corners of 45°, 45°, and 90°. They are most often made by ripping the plywood at 6 + 1 ⁄ 2 inches (170 mm) and then mitering it at 45 degree angles to create triangles with 9-inch (230 mm) legs.
Keystone wall plates are made to work with many different types of cabling solutions, including coaxial, twisted pair, HDMI, optical fiber, etc. Keystone wall plates are made of plastic and have one to twelve ports. A keystone port is a hole in the wall plate which allows the insertion of a keystone module or other male or female cabling ...