Tower+Bridge

//**History**//: Built in 1886-1894, five major contracts-Sir Jhon Jackson(foundation), Baron Armstrong(hydraulics), William Webster, Sir H.H. Bartlet, and Sir, William Arrol and co- and employed of 432 construction workers. two massive piers, containing over 70,000 tons of concrete were into the riverbed to support the construction. Over 11,000 tons of steel provided the framework for the towers and walkways. Thiswas then clad in cornishe granite and portland stone, both to protect the underlying steelwork and to givee the bridge a pleasing appearance. The bridge was officially opened on 30 June 1894by the prince of wales, and his wife, the princess of wales. The bridge connected iron gate on the north bank of the river. In the second half of the 19th century, increase developmentin the east end of londres, led to requiremen for a new river crossing downstream of london bridge. //**Characteristics**:// Is combine bascule and suspension bridge in london, over the river of thames, it is close to the tower of london, from which it takes it names, it has become an iconic symbol. length:244 meteres, longest span: 61 meters, clearance below:8.6 meters(closed) 42.5 meters open. The bridge consist of two towers tied togethers at a upper level by means of two horizontal walkways designed to withstand the horizontal forces existed by the suspended section of the bridge on the landward sides to the tower. Between the tower is split into two equal bascules or leaves, which can raised to an angle of 83 grade allow side traffic to pass. The bascules are raiesed around 1000 times a year. River traffic now is more reduced //**People and** **places**//:The bridges colours, sheme clothes from 1977, when it was painted red, white and blue for the queen elizabeth. A special bridge subway comitte was formed in 1876 chaised by Sir Albert Joseph Allman, to find a solution to the river cossing problem. E.W Crutwell was the resident engineers for the construction. The hydraulic system was designed and installed by the Hamilton Owen Rendel (born 1843). //**Renovation**// //**Floor Plan**//: //**Links**// __en.wikipedia.org/wiki/tower_bridge__ __francisco herrarte alejandro melgar__