On August 1, 2007 at 6:05 pm the I35 bridge in Minneapolis, Minnesota collapsed. This video explains why the bridge collapsed. It video discusses the age of the bridge and the amount of deterioration and bridge inspection ratings. Finally, the design is discussed. The bridge was not designed correctly and this contributed to the failure. A video of the failure is also shown that highlights tracks how the failure occurs at the under designed Node U10. At the time of failure the bridge was under construction and a load of 580,000 lbs was placed in a 12’ x 115’ area. This is a large load for a small area. Furthermore, this load happened to be placed right at the under designed spot.
The video goes on to discuss ways that the failure could have been avoided and it completes by highlighting changes that are needed to keep failures like this from happening in the future.
A detailed report can be found here: www.ntsb.gov/investigations/A...
A video of the failure can be found here: • Video
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