Speckles for Safety: NIST Helps Measure Stress in Bridges 

It'll be interesting how this experiment will play out and what effect it will have bridge construction into the future.

the system used was the Vic-3D system from Correlated Solutions, Inc.

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Funny - closing the barn door after the horse is gone - just looking at images of the actual gusset plate before failure in the Minnesota bridge failure case clearly showed buckling - and the adjacent strain gauge rossette (mounted on a thicker member - why didn't the ME see the deformed plate!) clearly not effective.

Mechanical Engineer looking into steel structures....hm....thats a first!!!!