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ENR > Transportation > Safety Board Finds I-35W Bridge Plates Too Thin - ENR | McGraw-Hill Construction
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| National Transportation Safety Board investigators probing the Aug. 1 collapse of an Interstate highway bridge in Minneapolis have found that some of the gusset plates in the bridge's main trusses were about half as thick as required and too thin to provide the expected "margin of safety," NTSB Chairman Mark V. Rosenker said. In response to these "interim findings," NTSB recommended Jan. 15 that the Federal Highway Administration require states and other bridge owners to conduct load-capacity calculations of non-load-path-redundant steel truss bridges.
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