Patent ID: 7261044

Claim:
A boxcar comprising: a box structure defined in part by a pair of sidewall assemblies, a pair of endwall assemblies, a floor assembly and a roof assembly; the floor assembly mounted on a railway car underframe; the sidewall assemblies mounted on the railway car underframe adjacent to opposite sides of the floor assembly; a respective longitudinal joint formed between each sidewall assembly and adjacent portions of the floor assembly; each sidewall assembly having an exterior surface and an interior surface; a plurality of metal support posts disposed between the interior surface and the exterior surface of each sidewall assembly; portions of a cargo restraining system disposed within each sidewall assembly proximate the respective longitudinal joint with the floor assembly; the sidewall assemblies extending respectively along opposite sides of the railway car underframe; the plurality of metal support posts for each sidewall assembly attached with a respective side sill assembly of the railway car underframe; and layers of insulating material disposed between adjacent portions of the support posts and the respective side sill assemblies.