On the southern girder, the crack only propagated through half the bottom flange. In both girders, top flanges, which are level, and the tapered bottom flanges are made from 4-in.-thick plates.

But there also was much talk of the project’s black eye, as a consequence of brittle fractures of the bottom flanges of two bridge-like built-up plate girders that span 87 ft over Fremont Street.

Abstract: Past earthquakes have shown that the considerable in-plane strength of most bridge superstructures is not always sufficient to prevent damage to components of steel plate girder ...

15. I-90 Mississippi River Dresbach Bridge Donated by: Ames Construction in cooperation with Minnesota Department of Transportation (MnDOT) Original Location: Over Mississippi River between La Crosse, ...