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Charles Anderson Memorial Bridge
The Charles Anderson Memorial Bridge is a steel deck truss bridge located in Pittsburgh, Pennsylvania, United States. The bridge carries the four-lane roadway of Boulevard of the Allies across a ravine known as Junction Hollow, connecting the neighborhoods of Central Oakland and South Oakland with Schenley Park. The bridge also spans the Junction Hollow Trail and P&W Subdivision railroad tracks which run along the bottom of the valley. The Anderson Bridge is a notable example of a Wichert truss, a rare bridge type with few surviving examples. The Wichert truss is a type of modified continuous truss using a quadrilateral section over each support to make it statically determinate. The design was patented by Pittsburgh civil engineer Edward M. Wichert in 1930. The Anderson Bridge is one of two Wichert truss bridges in Pittsburgh along with the Homestead Grays Bridge. The bridge is a contributing property in the Schenley Park Historic District. It was also assessed by the Penns ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junction Hollow
Junction Hollow is a small wooded valley bordering the west flanks of Schenley Park and the campus of Carnegie Mellon University and the southern edge of the University of Pittsburgh's campus in Pittsburgh, Pennsylvania. The valley runs south to north approximately . It begins where Four Mile Run empties into the Monongahela River and runs through the neighborhood of Four Mile Run north into Oakland along Schenley Park, Carnegie Mellon, and the Carnegie Museums of Pittsburgh, and ends at Neville Street behind Central Catholic High School. It is spanned by four major bridges; from north to south they are the Forbes Avenue Bridge, Schenley Bridge, Charles Anderson Memorial Bridge, and Frazier Street Bridge. Junction Hollow is often confused for Panther Hollow, which at Panther Hollow Lake veers off from it to the northeast into the park. History Junction Hollow is named for the Pittsburgh Junction Railroad, which first laid tracks there in the 1880s, and the idea of a Junctio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kite (geometry)
In Euclidean geometry, a kite is a quadrilateral with reflection symmetry across a diagonal. Because of this symmetry, a kite has two equal angles and two pairs of adjacent equal-length sides. Kites are also known as deltoids, but the word ''deltoid'' may also refer to a deltoid curve, an unrelated geometric object sometimes studied in connection with quadrilaterals.See H. S. M. Coxeter's review of in : "It is unfortunate that the author uses, instead of 'kite', the name 'deltoid', which belongs more properly to a curve, the three-cusped hypocycloid." A kite may also be called a dart, particularly if it is not convex. Every kite is an orthodiagonal quadrilateral (its diagonals are at right angles) and, when convex, a tangential quadrilateral (its sides are tangent to an inscribed circle). The convex kites are exactly the quadrilaterals that are both orthodiagonal and tangential. They include as special cases the right kites, with two opposite right angles; the rhombi, with two ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Partial Cloverleaf Interchange
A partial cloverleaf interchange or parclo is a modification of a cloverleaf interchange. The design has been well received, and has since become one of the most popular freeway-to-arterial interchange designs in North America. It has also been used occasionally in some European countries, such as Germany, Hungary, Italy, the Netherlands, and the United Kingdom. Comparison with other interchanges *A diamond interchange has four ramps. *A cloverleaf interchange has eight ramps, as does a stack interchange. They are fully grade separated, unlike a parclo, and have traffic flow without stops on all ramps and throughways. *A parclo generally has either four or six ramps but less commonly has five ramps. Naming In Ontario, the specific variation is identified by a letter/number suffix after the name. Ontario's naming conventions are used in this article. The letter ''A'' designates that two ramps meet the freeway ''ahead'' of the arterial road, while ''B'' designates that two ram ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pittsburgh Sun-Telegraph
The ''Pittsburgh Sun-Telegraph'' was an evening daily newspaper published in Pittsburgh, Pennsylvania from 1927 to 1960. Part of the Hearst newspaper chain, it competed with ''The Pittsburgh Press'' and the ''Pittsburgh Post-Gazette'' until being purchased and absorbed by the latter paper. Predecessors The ''Sun-Telegraph''s history can be traced back through its 19th- and early 20th-century forebears: the ''Chronicle'', ''Telegraph'', ''Chronicle Telegraph'', and ''Sun''. ''Chronicle'' The ''Morning Chronicle'' was established on June 26, 1841 by Richard George Berford. At first a semi-weekly paper, it became a daily on September 8 of the same year. The original editor was 19-year-old J. Heron Foster, who would later be the founding editor of the ''Spirit of the Age'' and the ''Pittsburgh Dispatch''. A weekly edition of the paper first appeared in November 1841 with the title ''The Iron City and Pittsburgh Weekly Chronicle''. On August 30, 1851 the daily paper started issui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pittsburgh City Council
The Pittsburgh City Council serves as the legislative body in the City of Pittsburgh Pittsburgh ( ) is a city in the Commonwealth of Pennsylvania, United States, and the county seat of Allegheny County. It is the most populous city in both Allegheny County and Western Pennsylvania, the second-most populous city in Pennsyl .... It consists of nine members. City council members are chosen by plurality elections in each of nine districts. The city operates under a mayor-council system of local governance. Current membership The current members of the city council are: † Denotes Council President (since 2020) ‡ Denotes Council President pro tempore (since 2020) Past presidents *Bruce Kraus 2014–2020 *Darlene Harris 2010–2014 *Doug Shields 2006–2010 *Luke Ravenstahl 2005–2006 *Gene Ricciardi 2002–2005 *Bob O'Connor (mayor), Bob O'Connor 1998–2002 *Jim Ferlo 1994–1998 *Jack Wagner (politician), Jack Wagner 1990–1994 *Ben Woods 1988–1990 *Sophie M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Over Panther Hollow (11760548803)
A bridge is a structure built to 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 the origin of the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Public Works Administration
The Public Works Administration (PWA), part of the New Deal of 1933, was a large-scale public works construction agency in the United States headed by Secretary of the Interior Harold L. Ickes. It was created by the National Industrial Recovery Act in June 1933 in response to the Great Depression. It built large-scale public works such as dams, bridges, hospitals, and schools. Its goals were to spend $3.3 billion (about $10 per person in the U.S.) in the first year, and $6 billion (about $18 dollars per person in the U.S.) in all, to supply employment, stabilize buying power, and help revive the economy. Most of the spending came in two waves in 1933–1935 and again in 1938. Originally called the ''Federal Emergency Administration of Public Works'', it was renamed the Public Works Administration in 1935 and shut down in 1944. The PWA spent over $7 billion (about $22 dollars per person in the U.S.) on contracts with private construction firms that did the actual work. It creat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merge (traffic)
In traffic engineering, a merge is the point where two streams of traffic travelling in the same direction from multiple roads or in multiple lanes on the same road are required to merge into a single lane. A merge may be a permanent road feature, for example at the end of a dual carriageway, or a temporary feature, common during roadworks. Methods Slip road Generally speaking, at a slip road onto a controlled-access highway or otherwise, traffic on the highway has priority over traffic joining at the slip road, and therefore the slip road traffic should accelerate to the speed on the major road and merge into a gap in the stream of traffic in lane one. At some slip roads, traffic continues into a new lane (a "lane gain") and therefore does not need to merge. Early merge The early merge method dictates that one stream of traffic will maintain priority over another at the merge, and therefore traffic in the other lane should merge at the first opportunity. To encourage dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamite
Dynamite is an explosive made of nitroglycerin, sorbents (such as powdered shells or clay), and Stabilizer (chemistry), stabilizers. It was invented by the Swedish people, Swedish chemist and engineer Alfred Nobel in Geesthacht, Northern Germany, and patented in 1867. It rapidly gained wide-scale use as a more robust alternative to gun powder, black powder. History Dynamite was invented by Swedish chemist Alfred Nobel in the 1860s and was the first safely manageable explosive stronger than black powder. Alfred Nobel's father, Immanuel Nobel, was an industrialist, engineer, and inventor. He built bridges and buildings in Stockholm and founded Sweden's first rubber factory. His construction work inspired him to research new methods of blasting rock that were more effective than black powder. After some bad business deals in Sweden, in 1838 Immanuel moved Nobel family, his family to Saint Petersburg, where Alfred and his brothers were educated privately under Swedish and Russi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinkerton (detective Agency)
Pinkerton is a private security guard and detective agency established around 1850 in the United States by Scottish-born cooper Allan Pinkerton and Chicago attorney Edward Rucker as the North-Western Police Agency, which later became Pinkerton & Co, and finally the Pinkerton National Detective Agency. It is currently a subsidiary of Securitas AB. Pinkerton became famous when he claimed to have foiled a plot to assassinate president-elect Abraham Lincoln in 1861. Lincoln later hired Pinkerton agents to conduct espionage against the Confederacy and act as his personal security during the Civil War.p. 43 The Pinkerton National Detective Agency hired women and minorities from its founding, a practice uncommon at the time, as they were useful as spies. At the height of their power, the Pinkerton Detective Agency was the largest private law enforcement organization in the world. Following the Civil War, the Pinkertons began conducting operations against organized labor. During the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strikebreaker
A strikebreaker (sometimes called a scab, blackleg, or knobstick) is a person who works despite a strike. Strikebreakers are usually individuals who were not employed by the company before the trade union dispute but hired after or during the strike to keep the organization running. Strikebreakers may also refer to workers (union members or not) who cross picket lines to work. The use of strikebreakers is a worldwide phenomenon; many countries have passed laws outlawing their use to give more power to unionized workers. , strikebreakers were used far more frequently in the United States than in other industrialized countries. International law The right to strike is not expressly mentioned in any convention of the International Labour Organization (ILO) the ILO's Freedom of Association Committee established principles on the right to strike through rulings. Among human rights treaties, only the International Covenant on Economic, Social and Cultural Rights contains a clau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Bridge Company
The American Bridge Company is a heavy/civil construction firm that specializes in building and renovating bridges and other large, complex structures. Founded in 1900, the company is headquartered in Coraopolis, Pennsylvania, a suburb of Pittsburgh. The firm has built many bridges in the U.S. and elsewhere; the Historic American Engineering Record notes at least 81. American Bridge has also built or helped build the Willis Tower, the Empire State Building, the Chrysler Building, launch pads, resorts, and more. During World War II, it produced tank landing ships (LSTs) for the United States Navy. In 2020, American Bridge Company was acquired by Southland Holdings LLC. History American Bridge Company was founded in April 1900, when J.P. Morgan & Co. led a consolidation of 28 of the largest U.S. steel fabricators and constructors. The company's roots extend to the late 1860s, when one of the consolidated firms, Keystone Bridge Company, built the Eads Bridge at St. Louis, the fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
