The Brooklyn Bridge looms royally over New York City's East River, linking the two boroughs of Manhattan and Brooklyn. Since 1883, its stonework towers and steel cables have obtainable a safe and picturesque passageway to millions of commuters and tourists, trains and bicycles, pushcarts and cars.
John Augustus Roebling, the Brooklyn Bridge’s inventor, was a great pioneer in the design of steel deferral bridges. Born in Germany in 1806, he studied manufacturing engineering in Berlin and at the age of 25 immigrated to western Pennsylvania, where he effort, ineffectively, to make his living as a cultivator. He later enthused to the state assets in Harrisburg, where he found work as a civil engineer.
Using this replica, Roebling effectively bridges the Niagara Gorge at Niagara Falls, New York, and the Ohio River in Cincinnati, Ohio. In 1867, on the basis of this attainment, New York legislators accepted Roebling's plan for a deferral bridge in excess of the East River between Manhattan and Brooklyn.
The Process of Perilous:
To achieve a solid charity for the bridge, workers dig the riverbed in enormous wooden boxes called caissons. These airtight chambers were pinned to the river's floor by massive granite blocks; pressurized air was pumped in to keep water and wreckage out.
Workers known as "sandhogs" many of them migrant earning about $2 a day used shovels and explodes to clear away the mud and boulders at the base of the river. Each week, the caissons inched earlier to the bedrock. When they arrived at a sufficient depth 44 feet on the Brooklyn side and 78 feet on the Manhattan side they began put down granite, working their way back up to the exterior.