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Alvin C. York Bridge
The Alvin C. York Bridge is a continuous box girder bridge that carries U.S. Route 412 across the Tennessee River, connecting Perry County, Tennessee, and Decatur County, Tennessee. It was completed in 1986 to replace an earlier through truss bridge of the same name built in 1930. The largest single span Span may refer to: Science, technology and engineering * Span (unit), the width of a human hand * Span (engineering), a section between two intermediate supports * Wingspan, the distance between the wingtips of a bird or aircraft * Sorbitan es ... is . References {{Tennessee-bridge-struct-stub Bridges Bridges completed in 1986 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tennessee River
The Tennessee River is the largest tributary of the Ohio River. It is approximately long and is located in the southeastern United States in the Tennessee Valley. The river was once popularly known as the Cherokee River, among other names, as the Cherokee people had their homelands along its banks, especially in what are now East Tennessee and northern Alabama. Additionally, its tributary, the Little Tennessee River, flows into it from Western North Carolina and northeastern Georgia, where the river also was bordered by numerous Cherokee towns. Its current name is derived from the Cherokee town, ''Tanasi'', which was located on the Tennessee side of the Appalachian Mountains. Course The Tennessee River is formed at the confluence of the Holston and French Broad rivers in present-day Knoxville, Tennessee. From Knoxville, it flows southwest through East Tennessee into Chattanooga before crossing into Alabama. It travels through the Huntsville and Decatur area before rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perry County, Tennessee
Perry County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 8,366, with an average population density of 18.6 persons per square mile (7.2 persons per square km) it is the least densely populated county in Tennessee. Its county seat and largest town is Linden. It is named after American naval commander and War of 1812 hero Oliver Hazard Perry. In 1806, the Cherokee ceded to the United States the land that would later become Perry County in the Treaty of Washington. The county was established by the Tennessee General Assembly in 1819 from parts of Wayne County, Hickman County, and Humphreys County. In 1846, the portions of Perry County located west of the Tennessee River were split off to form Decatur County. Agriculture and forestry are the largest components of the local economy, supplemented by light industry and tourism. Perry County is one of the most economically disadvantaged counties in the state. It was severely imp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decatur County, Tennessee
Decatur County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 11,435. Its county seat is Decaturville. History This county is named after naval hero Stephen Decatur, Jr., who gained national recognition in the First Barbary War, the Second Barbary War, and the War of 1812 by his leadership and achievements at sea. The county was created in November 1845 from the part of Perry County west of the Tennessee River in response to a petition by citizens on the west side of the river who lacked easy access to the county seat on the east side. In 2015, the Decatur County clerk of court and the entire staff of that office resigned, to express conscientious objection to the United States Supreme Court's ruling in ''Obergefell v. Hodges'', which would oblige the office to issue marriage licenses to same-sex couples. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (3.2%) is water. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Box Girder Bridge
A box girder bridge, or box section bridge, is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises prestressed concrete, structural steel, or a composite of steel and reinforced concrete. The box is typically rectangular or trapezoidal in cross-section. Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. Although the box girder bridge is normally a form of beam bridge, box girders may also be used on cable-stayed and other bridges. Development of steel box girders In 1919, Major Gifford Martel was appointed head of the Experimental Bridging Establishment at Christchurch, Hampshire, which researched the possibilities of using tanks for battlefield engineering purposes such as bridge-laying and mine-clearing. Here he continued trials on modified Mark V tanks. The bridging component involved an assault bridge, designed by Major Charles Ingli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Through Truss Bridge
A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or sometimes both in response to dynamic loads. The basic types of truss bridges shown in this article have simple designs which could be easily analyzed by 19th and early 20th-century engineers. A truss bridge is economical to construct because it uses materials efficiently. Design The nature of a truss allows the analysis of its structure using a few assumptions and the application of Newton's laws of motion according to the branch of physics known as statics. For purposes of analysis, trusses are assumed to be pin jointed where the straight components meet, meaning that taken alone, every joint on the structure is functionally considered to be a flexible joint as opposed to a rigid joint with strength to maintain its own shape, and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Span (architecture)
Span is the distance between two intermediate supports for a structure, e.g. a beam (structure), beam or a bridge. A span can be closed by a solid beam or by a rope. The first kind is used for bridges, the second one for power lines, overhead telecommunication lines, some type of Antenna (radio), antennas or for aerial tramways. The span is a significant factor in finding the strength and size of a beam as it determines the maximum bending moment and Deflection (engineering), deflection. The maximum bending moment M_ and deflection \delta_in the pictured beam is found using: :M_ = \frac :\delta_ = \frac = \frac where :q = Uniformly distributed load :L = Length of the beam between two supports (span) :E = Modulus of elasticity :I = Area moment of inertia Note that the maximum bending moment and deflection occur midway between the two supports. From this it follows that if the span is doubled, the maximum moment (and with it the tensile stress, stress) will quadruple, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridges
A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones. The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge (dating from the 13th century BC, in the Peloponnese) is one of the oldest arch bridges still in existence and use. Etymology The ''Oxford English Dictionary'' traces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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