The existing road bridge's life will be less than that of many current 2.000MW coal-fired power stations, which beggars belief that 'the understanding of corrosion was much less developed' in the 1960s. Simply, water corrodes steel and the main cable problem seems like a wrapping application error. Furthermore the Brooklyn Bridge is, in fact, a hybrid. It is basically a very strong, four-cable suspension bridge with a high safety factor, and originally carried trains as well as vehicles. Later, to stiffen the bridge, stays were added and they have also enhanced its appearance. The fact the main towers are of stone will increase the life of the bridge over concrete structures. Such heavily engineered bridges also allow critical parts to be replaced without ending the bridge's operational life.
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