The girders are spaced at 6 ft on centers. The plate girders are made up of 1 in. thick by 9 in. wide flanges and webs of 5/16 in. thick by 39 in. deep. The bearing stiffener plates are 7/8 in. thick.

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 ...