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Archive for Friday, November 14, 2008

Design errors caused 2007 bridge collapse

November 14, 2008

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— Undersized steel reinforcing plates were cited Thursday as the chief cause of last year's deadly collapse of a highway bridge in Minneapolis.

Federal investigators also said the plates were overstressed by almost 300 tons of construction material piled on the bridge.

Investigators told the National Transportation Safety Board that the collapse of the Interstate 35W bridge on Aug. 1, 2007, was unavoidable once gusset plates in the center span failed.

When that happened, it dragged other sections of the bridge and rush-hour commuters into the Mississippi River, killing 13 and injuring 145. The plates are commonly fused to intersecting beams to reinforce the connection.

Investigators focused on the U-10 gusset plates, which were designed at only half the required thickness.

"Had the gusset plates been properly sized, this bridge would still be there," said Bruce Magladry, director of the NTSB's office of highway safety.

Comments

cthulhu_4_president 5 years, 11 months ago

Well the sooner the investigation narrows down the list of people to blame to one or two, then the sooner we can have our little witch hunt, then we can all go back to feeling perfectly safe on bridges again. It had better happen soon. I need to blame somebody!!mustb: The entire design and construction crew? Really?You realize that is probably about 1000 people total, 990 of whom probably had nothing to do with the gusset plates that caused the accident? A closer read of the article may be in order before you sentance 1000 people to jail.

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S0uPnAzi 5 years, 11 months ago

This is the sort of story that just gives you a warm, fuzzy all over!! It is incomprehensible that a federal project such as an interstate bridge could have issues like this. Was there no oversight on the construction of this bridge? Federal inspectors HAD to be on scene to survey the work being done. This is an outrage, and we as tax paying Americans should be calling for better management and oversight on Federal Projects of this magnitude!

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