The
first bridges were built with wooden planks, ropes and stones. Soon, stronger material were required. Wood and stone bridges gave way to iron, then to steel ones. Bridge building techniques also evolved: beam, cantilevered, cable-stayed, and suspension bridges – each with advantages that made it the right choice for a particular location.
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| Beautiful bridge photography |
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| In 1855, engineer John Roebling started to design a bridge that at the time would be the longest suspension bridge in the world, with towers being the tallest structures in the Western Hemisphere: the Brooklyn Bridge in New York. |
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| It’s funny to think about ancient traffic jams, but that was why the Tower Bridge in London, England was built. By the end of the 19th century, the development of the eastern part of London caused such a load on the London Bridge that the city decided to build a new bridge. |
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| The Golden Gate Bridge is such an iconic symbol of San Francisco (and of suspension bridge in general) that it’s hard to imagine a time when it didn’t exist. But before it was built, most people thought it was an impossible task. |
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