Watch VideoA 50-year-old bridge that collapsed in Pittsburgh had been rated as poor on a recent inspection report, but transportation officials and engineering experts cautioned that doesn't necessarily signal imminent danger for the thousands of other U.S. bridges with the same designation.
Investigators from the National...
What Does Poor Rating For Collapsed Pittsburgh Bridge Mean For Others?
Newsy
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Pittsburgh Bridge collapse: What does poor rating for collapsed bridge mean for others?
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A 50-year-old bridge that collapsed in Pittsburgh had been rated as poor on a recent inspection report, but transportation..