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Construction of a four-centred arch. A four-centred arch (Commonwealth spelling) or four-centered arch (American spelling) is a low, wide type of arch with a pointed apex.Its structure is achieved by drafting two arcs which rise steeply from each springing point on a small radius, and then turning into two arches with a wide radius and much lower springing point.
A timber bridge or wooden bridge is a bridge that uses timber or wood as its principal structural material. One of the first forms of bridge, those of timber have been used since ancient times. Wooden bridges could be a deck-only structure or a deck with a roof. Wooden bridges were often a single span, but could be of multiple spans.
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Aerial view of Devils Garden from the southeast Landscape Arch. Devils Garden [note 1] is an area of Arches National Park, located near Moab, Utah, United States, [2] that features a series of rock fins and arches formed by erosion. [3] The Devils Garden Trail, including more primitive sections and spurs, meanders through the area for 7.2 mi ...
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A 1908 rail map of the surrounding area. The viaduct supports the pink line from London Bridge to Deptford Creek The SER leased the L&GR from 1845, and in 1847 obtained powers to widen the viaduct still further with the addition of two further lines for 2.65 miles (4.26 km) on the north side to accommodate the Southeastern Railway main line.
A defect at the R-S portion of the intrados makes the arch susceptible to extra force along the line M-N, where the polygon curve can be pushed out of the envelope of the arch causing a collapse. While building masonry arches in the not very tall buildings of the past, a practical assumption was that the stones can withstand virtually unlimited ...
The Union Station arch is located in McFerson Commons (sometimes known as Arch Park), where it serves as its central focal point. [1] The site was formerly the eastern edge of the Ohio Penitentiary, which stood there from 1834 to 1997. The Beaux-Arts arch measures 35 ft (11 m) tall, and weighs about 4 short tons (3.6 t). [2]
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3579 S High St, Columbus, OH · Directions · (614) 409-0683