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SKJ25POL said:So is this redundancy issue not true about bridge piers with only one or just two piers on a bridge girders support?
If the one pier mid-span support collapses then no matter how many girders are sitting on it, the bridge will come down?
I don't know why the focus is just the numbers of girders, there are tons of other stuff makes the bridge weak and high risk for collapse?
KSDOT said:Fracture Critical Bridges
Fracture Critical is a classification for members (e.g., girders, beams, piers) of a structure that are steel, have a higher risk of cracking, and are non-redundant (failure of a Fracture Critical Member may lead to a progressive failure of the entire structure). Fracture Critical Members (FCM) require an "arm-length" inspection everytwo years at minimum.