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In the winter of 1852, John Roebling and his 15 year-old son, Washington were riding a ferry boat across the East River from New York to Brooklyn. John Roebling was an engineer. His specialty was building bridges. As he looked across the Eas ....

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... it. And it had to be long. The East River was nearly half a mile wide at that point. But John also knew about a type of bridge that could solve all the problems. It was called a suspension bridge. Every suspension bridge is different, but they all work in the same way. The roadway doesn’t rest on supports. Instead it hangs in the air, suspended from thick cables. Only two towers are needed to hold up the cables, and they can be placed far apart to keep the river open for boat traffic. Finally in 1867 The New York Bridge Company made John A. Roebling engineer. In just three months he produced all drawings, cross sections, location pl ...