The investigation revealed that photos from a June 2003 inspection of the bridge showed gusset plate bowing.
From the en.wikipedia.org
Early in the investigation of the Minneapolis case, the safety board identified the plate, called a gusset plate, as a possible cause.
From the nytimes.com
The collapse was attributed to a design deficiency that resulted in a gusset plate failing during ongoing construction work.
From the sciencedaily.com
After more than a year of experiments, Ocel says, the FHWA has learned a lot about how to predict what loads will cause a gusset plate to fail.
From the sciencedaily.com
In addition to rust and corrosion, officials said there appears to be some buckling of a gusset plate in one location on the deck truss portion of the Winona bridge.
From the signonsandiego.com
In the past, bridge inspectors have found corrosion or cracking in gusset plates, but they do not generally inspect to assure that the gusset plate is the right size, experts said.
From the nytimes.com
The second stage consisted of applying the forces calculated in these models to a detailed computer model of the node of the bridge that involved the suspected gusset plate.