Summary of Tower Bridge
Tower Bridge is a combined bascule and suspension bridge in London, England,
over the River Thames. It is close to the Tower of London, which gives it its name. It
has become an iconic symbol of London.
The bridge consists of two towers which are tied together at the upper level by
means of two horizontal walkways which are designed to withstand the horizontal
forces exerted by the suspended sections of the bridge on the landward sides of the
towers. The vertical component of the forces in the suspended sections and the
vertical reactions of the two walkways are carried by the two robust towers. The
bascule pivots and operating machinery are housed in the base of each tower. The
bridge's present colour dates from 1977 when it was painted red, white and blue for
the Queen's Silver Jubilee. Originally it was painted a chocolate brown colour.
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