Did MnDOT Make a Fatal Choice?

IMG_0192.JPGPHOTO: Harry Goldstein, IEEE SpectrumA report in todayâ''s Minneapolis Star-Tribune states that the Minnesota Department of Transportation â''last winter considered bolting steel platesâ'' to the trusses on the 35W bridge â''to prevent cracking in fatigued metal,â'' and even went so far as to ask contractors for advice on the best way to accomplish the task.The move was prompted by the URS Corporation June 2006 report, which recommended â''three equally viableâ'' retrofit approaches:

(1) Steel plating of all 52 fracture critical truss members. This approach will provide member redundancy to each of the identified fracture …

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