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A portion of the arch surrounding the keystone is called a crown. [4] Keystones or their suggested form are sometimes placed for decorative effect in the centre of the flat top of doors, recesses and windows, so as to form an upward projection of a lintel, as a hallmark of strength or good architecture.
A lintel or lintol is a type of beam (a horizontal structural element) that spans openings such as portals, doors, windows and fireplaces. It can be a decorative architectural element, or a combined ornamented/structural item.
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.
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), [84] 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 ...
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
Post and lintel (also called prop and lintel, a trabeated system, or a trilithic system) is a building system where strong horizontal elements are held up by strong vertical elements with large spaces between them. This is usually used to hold up a roof, creating a largely open space beneath, for whatever use the building is designed.
Image credits: Old-time Photos "My generation (Generation X) came along, and we had 'real' cameras and developed prints, but also lived the transition to digital," Ed continued.
A screenshot of Windows Embedded 8 Industry. It is almost identical to Windows 8 with no real changes (apart from the branding), and uses the Metro version of the Windows Aero theme. Based on Windows 8, [25] Windows Embedded 8 Industry was released on April 2, 2013 [15] [26] and is available in Pro, Pro Retail, and Enterprise editions.