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The most notable bridge failure due to gusset plates is the collapse of I-35W Mississippi River bridge in Minneapolis, Minnesota on August 1, 2007. Investigators found that the bridge had 16 under-designed gusset plates that fractured and ripped, and that the remaining gusset plates were properly designed and remained intact.
The investigation revealed that photos from a June 2003 inspection of the bridge showed gusset-plate bowing. [126] [127] On November 13, 2008, the NTSB released the findings of its investigation. The primary cause of the collapse was the undersized gusset plates, at 0.5 inches (13 mm) thick.
The book is aimed at beginners, with each chapter outlining a single convention, including takeout doubles, negative doubles, and cuebid raises. [1] All chapters are followed by a quiz. Since its publication, the book has sold over 300,000 copies, [ 2 ] and won the American Bridge Teachers' Association Book of the Year (Student) award. [ 3 ]
Attempts have been made to increase the safety of bridges with pin and hanger assemblies by adding some form of redundancy to the assembly. Retrofits that add redundancy to pin and hanger assemblies include adding a "catcher's mitt"—a short steel beam attached to the bottom of the cantilevered girder that extends out beneath the suspended girder to "catch" the suspended girder should ...
The bridge was built in 1955, as part of the state government's upgrades to the U.S. Route 99 corridor and a year before the Interstate Highway System was begun. The bridge carries four lanes of traffic, two lanes in each direction separated by a median barrier. The portions over the river are four consecutive spans, each 160 feet (49 m) long.
The Made in America Store, which festooned with pro-America slogans including a 20-foot mural of the Constitution adorning the back wall, carries 15,000 American-made products — including ...
In response to the I-35W Bridge collapse in Minneapolis on August 1, 2007, all Minnesota bridges were ordered to be inspected. During an inspection, "gusset plate corrosion issues" were discovered in the Main Channel Bridge (Highway 43 / Highway 54), which crosses the Mississippi River between Winona, MN and nearby Fountain City, WI. The Main ...
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