>>1456066Inspection photos of the I-35 bridge over the Mississippi River, which collapsed in 2007. In the investigation they discovered that these photos from 2003 already showed that the undersized gusset plates were bowed. There were other factors such as resurfacing adding weight to the bridge since it was built, and a bunch of construction equipment and materials being stored on the bridge.
https://en.wikipedia.org/wiki/I-35W_Mississippi_River_bridgehttps://www.ntsb.gov/investigations/AccidentReports/Reports/HAR0803.pdf 