What caused the I-35W Mississippi River bridge to collapse?

What caused the I-35W Mississippi River bridge to collapse?

What caused a bridge that had satisfactorily performed for 40 years to collapse so suddenly?At 6:05 pm on 1 August 2007, the 40-year-old I-35W Highway Bridge in Minneapolis, Minnesota, suddenly collapsed. A 140 m-long section of the main truss, carrying 111 vehicles at the time, fell 33 m into the river below. Thirteen people were killed, and a further 145 were injured.Two factors played a role: one was an error in the bridge’s design; the other…