Tower Bridge during construction

 Regno Unito > England > London Borough of Southwark

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Tower Bride during its construction in 1892. Works started in 1886 and took eight years, with five construction companies and 432 employed construction workers. To support the huge structure, two massive piers, containing over 70,000 tons of concrete, were sunk into the riverbed. The framework for the towers and walkways required more than 11,000 tons of steel, which were then clad in Cornish granite and Portland stone, to protect the underlying steelwork.