B - Operations – Transporting – 61 – D
Patent
B - Operations, Transporting
61
D
B61D 17/04 (2006.01) B61D 3/20 (2006.01) B61F 1/10 (2006.01)
Patent
CA 2444160
A railroad freight car has longitudinally extending and spaced apart side beams. Each of the side beams has top and bottom longtudinally extending, spaced apart chord members. The bottom member is shorter in length than the top member. Each beam includes a planar sidewall extending between the top and bottom chord members. The side beams each have flanged bottom edges adjacent to the trucks. The bottom edge has an inboard straightedge portion, an intermediate curved portion and an outboard straightedge portion. The inboard portion is joined along its length to the bottom chord member. The curved portion extends upwardly from the inboard portion adjacent the terminal end portion of the bottom structural member and merges with the outboard portion of the bottom edge of the side beam. The curved portion defines a curved edge having a positive slope of constantly decreasing value when measured from the inboard portion to the outboard portion. The side beam has a one-piece curved flange connected to the terminal end of the bottom structural member and to the curved portion of the bottom edge of the sidewall along the entire length thereof. The continuous curvature of the flange is designed to reduce stress risers associated with geometric discontinuity, to enhance fatigue resistance of the flange itself and the end structure, and to facilitate access by an operator to a truck supporting the end structure.
Bereskin & Parr
National Steel Car Limited
LandOfFree
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