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Tower Bridge London CLICK HERE FOR DOWNLOAD Tower Bridge  is a combined  bascule  and  suspension bridge  in  London  built in 1886–1894. The bridge crosses the  River Thames  close to the  Tower of London  and has become an  iconic symbol  of London. Tower Bridge is one of five London bridges now owned and maintained by the  Bridge House Estates , a charitable trust overseen by the  City of London Corporation . It is the only one of the Trust's bridges not to connect the City of London directly to the Southwark bank, as its northern landfall is in  Tower Hamlets . The bridge consists of two  bridge towers  tied together at the upper level by two horizontal walkways, designed to withstand the horizontal  tension  forces exerted by the suspended sections of the bridge on the landward sides of the towers. The vertical components of the forces in the suspended sections and the vert...
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Peace Bridge

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Peace Bridge HD CLICK HERE FOR DOWNLOAD The Peace Bridge consists of five arched spans over the Niagara River and a Parker through-truss span over the Black Rock Canal on the American side of the river. The length is 5,800 feet (1.77 km). Material used in the construction included 3,500 feet (1.07 km) of steelwork, 9,000 tons of structural steel and 800 tons of reinforcing steel in the concrete abutments. The Peace Bridge was named to commemorate 100 years of peace between the United States and Canada.[citation needed] It was constructed as a highway bridge to address pedestrian and motor vehicle traffic which could not be accommodated on the International Railway Bridge, built in 1873.[citation needed]
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