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"Scissors" strainer arch arrangement in Wells Cathedral includes an inverted arch at the bottom of the upper opening. A strainer arch (also straining arch [1]) is an internal structural arch built to relieve the inward pressure [2] off the spanned vertical supports (providing a "buttress", thus also called buttressing arches [citation needed]), usually as an afterthought to prevent the ...
A truss arch bridge combines the elements of the truss bridge and the arch bridge. The actual resolution of forces will depend upon the bridge' design . [ 1 ] If no horizontal thrusting forces are generated, this becomes an arch-shaped truss which is essentially a bent beam – see moon bridge for an example.
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.
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The Burr Arch Truss—or, simply, Burr Truss or Burr Arch—is a combination of an arch and a multiple kingpost truss design. It was invented in 1804 by Theodore Burr , [ 1 ] patented on April 3, 1817, [ 2 ] and used in bridges , usually covered bridges .
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A building's surface detailing, inside and outside, often includes decorative moulding, and these often contain ogee-shaped profiles—consisting (from low to high) of a concave arc flowing into a convex arc, with vertical ends; if the lower curve is convex and higher one concave, this is known as a Roman ogee, although frequently the terms are used interchangeably and for a variety of other ...
This booster is powerful enough to detonate the main charge in a high-explosive shell or the ejecting charge in a carrier shell. The two charges are typically connected by a 'flash tube'. The safety and arming arrangements in artillery fuzes are critical features to prevent the fuze functioning until required, no matter how harsh its transport ...