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Donald R. Lobaugh Bridge
The Donald R. Lobaugh Bridge (commonly known as the Freeport Bridge) is a cantilever bridge that carries vehicular traffic across the Allegheny River between Buffalo and Allegheny townships in Pennsylvania. History Built in 1965, the bridge marks the boundary between suburban Pittsburgh and the more rural Upper Allegheny. The structure replaced the 1889 Garvers Ferry Bridge, which was extremely deteriorated by the 1950s and that was nearly destroyed in a 1959 barge collision. The bridge's namesake is Donald R. Lobaugh, a Medal of Honor recipient from World War II. The bridge was listed as having a poor deck and substructure and having serious deterioration of its superstructure before having $5 million of emergency steel repairs in 2006/2007. Before the repairs the weight limit was 3 tons; this was increased to a legal load limit of 40 tons after the repairs. The bridge is maintained by Pennsylvania Department of Transport 12-0 and was rehabilitated over a period from 2010 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freeport Rail Bridge
The Freeport Rail Bridge is a truss bridge that carries the Norfolk Southern Railway across the Allegheny River between Freeport and Allegheny Township in Pennsylvania. A structure originally created on this site by the Pennsylvania Railroad as part of their West Penn Line in 1866. In 1895, the railroad replaced this bridge; the third and current incarnation was completed in 1950, along with new approach ramps that eliminated a narrow tunnel. Prior to 1957, passenger service was carried along this line (the Conemaugh Line) alongside freight. Following the decline of the PRR, Conrail took over control of the bridge. Currently, it is operated as part of the Pittsburgh Division of Norfolk Southern. See also *List of crossings of the Allegheny River References KVRR History [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truss Bridges In The United States
A truss is an assembly of ''members'' such as beams, connected by ''nodes'', that creates a rigid structure. In engineering, a truss is a structure that "consists of two-force members only, where the members are organized so that the assemblage as a whole behaves as a single object". A ''two-force member'' is a structural component where force is applied to only two points. Although this rigorous definition allows the members to have any shape connected in any stable configuration, architectural trusses typically comprise five or more triangular units constructed with straight members whose ends are connected at joints referred to as '' nodes''. In this typical context, external forces and reactions to those forces are considered to act only at the nodes and result in forces in the members that are either tensile or compressive. For straight members, moments (torques) are explicitly excluded because, and only because, all the joints in a truss are treated as revolutes, as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Bridges In Pennsylvania
A road is a thoroughfare used primarily for movement of traffic. Roads differ from streets, whose primary use is local access. They also differ from stroads, which combine the features of streets and roads. Most modern roads are paved. The words "road" and "street" are commonly considered to be interchangeable, but the distinction is important in urban design. There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, and local roads. The primary features of roads include lanes, sidewalks (pavement), roadways (carriageways), medians, shoulders, verges, bike paths (cycle paths), and shared-use paths. Definitions Historically, many roads were simply recognizable routes without any formal construction or some maintenance. The Organization for Economic Co-operation and Development (OECD) defines a road as "a line of communication (travelled way) using a stabilized base ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cantilever Bridges In The United States
A cantilever is a rigid structural element that extends horizontally and is unsupported at one end. Typically it extends from a flat vertical surface such as a wall, to which it must be firmly attached. Like other structural elements, a cantilever can be formed as a beam, plate, truss, or slab. When subjected to a structural load at its far, unsupported end, the cantilever carries the load to the support where it applies a shear stress and a bending moment. Cantilever construction allows overhanging structures without additional support. In bridges, towers, and buildings Cantilevers are widely found in construction, notably in cantilever bridges and balconies (see corbel). In cantilever bridges, the cantilevers are usually built as pairs, with each cantilever used to support one end of a central section. The Forth Bridge in Scotland is an example of a cantilever truss bridge. A cantilever in a traditionally timber framed building is called a jetty or forebay. In the south ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel Bridges In The United States
Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to steel's high elastic modulus, yield strength, fracture strength and low raw material cost, steel is one of the most commonly manufactured materials in the world. Steel is used in structures (as concrete reinforcing rods), in bridges, infrastructure, tools, ships, trains, cars, bicycles, machines, electrical appliances, furniture, and weapons. Iron is always the main element in steel, but other elements are used to produce various grades of steel demonstrating altered material, mechanical, and microstructural properties. Stainless steels, for example, typically contain 18% chromium and exhibit improved corrosion and oxidation resistance versus its carbon steel counterpart. Under atmospheric pressures, steels generally take on two crystalline forms: body-centered cubic and face-centered cubic, however depending on the thermal history and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridges Completed In 1965
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path 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, 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 in existence and use. Etymology The ''Oxford English Dictionary'' traces the origin of the word ''bridge' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George D
George may refer to: Names * George (given name) * George (surname) People * George (singer), American-Canadian singer George Nozuka, known by the mononym George * George Papagheorghe, also known as Jorge / GEØRGE * George, stage name of Giorgio Moroder * George, son of Andrew I of Hungary Places South Africa * George, South Africa, a city ** George Airport United States * George, Iowa, a city * George, Missouri, a ghost town * George, Washington, a city * George County, Mississippi * George Air Force Base, a former U.S. Air Force base located in California Computing * George (algebraic compiler) also known as 'Laning and Zierler system', an algebraic compiler by Laning and Zierler in 1952 * GEORGE (computer), early computer built by Argonne National Laboratory in 1957 * GEORGE (operating system), a range of operating systems (George 1–4) for the ICT 1900 range of computers in the 1960s * GEORGE (programming language), an autocode system invented by Charles L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Crossings Of The Allegheny River
This is a list of current bridges and other crossings of the Allegheny River starting from Pittsburgh, Pennsylvania, where it joins the Monongahela River, Monongahela to form the Ohio River. Crossings Pennsylvania New York Pennsylvania See also * * * * * List of crossings of the Ohio River * List of crossings of the Monongahela River References {{DEFAULTSORT:Allegheny River Crossings of the Allegheny River, * Lists of river crossings in New York, Allegheny Lists of river crossings in the United States Lists of river crossings in Pennsylvania, Allegheney ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Route 356
Pennsylvania Route 356 (PA 356) is a state highway located in Westmoreland, Allegheny, Butler, and Armstrong counties in Pennsylvania. The southern terminus is at PA 66 near Oklahoma. The northern terminus is at U.S. Route 422 (US 422) near Butler. Route description PA 356 begins at an intersection with PA 66 in Washington Township, Westmoreland County, heading north on a two-lane undivided road. The route passes through wooded areas with some farm fields and homes, crossing into Allegheny Township. The road continues northwest, heading into farmland with some residential and commercial development. At this point, PA 356 begins to run to the southwest of PA 56, heading through wooded areas of homes and passing through Weinel Crossroads. The route comes to an intersection with PA 56, with that route heading northwest concurrent with PA 356. The road passes more homes and some businesses before PA 56 splits to the west on Leechburg Road. PA 356 winds northwest t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
