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The Gold Bridge And The Bridge Collapse

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Silver Bridge
4.1 Background
The Point Pleasant Bridge or so called the Silver Bridge was designed by the J.E. Greiner Company and built by the Gallia County Ohio River Bridge Company to connect Point Pleasant, West Virginia to Gallipolis, Ohio. It was designed as a two-lane eye-bar suspension type bridge, measuring 2,235 feet in total length, including the approaches. The bridge was the first eye-bar suspension bridge of its type to be constructed in the United States. [26] Figure 4.1: The Bridge before collapse. [26] During the early evening of December 15, 1967, the Silver Bridge collapsed during a period of heavy traffic and 46 people were killed. Another nine people were injured. Of the 37 vehicles on the bridge, 31 fell during the collapse. After some forty years of service, the Point Pleasant Bridge collapsed without warning. [27] Figure 4.2: The Bridge after collapse. [26] The bridge was constructed of carbon steel, which tends to crack. Many cracks were found throughout the bridge among extensive corrosion. Upon investigation, it was found that the collapse was due to a defective eye-bar that experienced a cleavage fracture in the lower part of its head which was resulted from stress corrosion and corrosion fatigue. [26] Since the eye-bars were not designed to be redundant, failure in one eye-bar would disrupt the continuity of the suspension system. This disruption is what caused the bridge to collapse suddenly. The location of the flaw

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