U of Minnesota's independent study of the I-35W bridge collapse results parallel NTSB report

Preliminary results of the University of Minnesota's independent academic study of the I-35W bridge collapse suggest that lack of robustness in the bridge's original design, additional load from bridge improvements over the years, weight from construction materials and stresses induced by temperature changes contributed to the collapse of the I-35W bridge on Aug. 1, 2007.

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