Patent ID: 7856931
Filing Date: 2010-12-28
Classification: B21D,B61D,Y10T

Abstract:
1. A center sill for a railroad freight car, comprising: (a) a first main structural member of plate metal having a length and a pair of opposite ends, and including a pair of parallel, longitudinally-extending bends defining a horizontal bottom cover portion and a pair of opposite upwardly extending side web portions; (b) a horizontal top cover in the form of a flat plate spaced upwardly apart from the bottom cover portion and extending longitudinally between the side web portions, the top cover having opposite lateral margins each welded to a respective one of the side web portions, thereby forming an elongate box beam structure; and (c) a horizontal filler plate overlapping and welded to the bottom cover portion adjacent a respective one of the opposite ends of the first main structural member.