Patent ID: 7228805

Claim:
An insulated railway boxcar comprising: a railway car underframe having a floor assembly mounted thereon and attached thereto; a pair of sidewall assemblies respectively mounted on and attached to opposite sides of the railway car underframe; a pair of endwall assemblies respectively mounted on and attached to opposite ends of the railway car underframe; each sidewall assembly formed in part from a plurality of metal sheets, metal support posts, and horizontal strips of fiber reinforced material; each endwall assembly formed in part from a plurality of metal sheets, metal end beams, and layers of fiber reinforced material; exterior surfaces of the metal sheets cooperating with each other to form exterior surfaces of the insulated railway car box; each support post and each end beam having a first surface and a second surface; the first surfaces of each support post and each end beam respectively attached to interior surfaces of adjacent metal sheets; the support posts and end beams spaced from each other to partially define void spaces with respect to the interior surfaces of adjacent metal sheets; respective isolators attached to the second surface of each metal support post and each metal end beam; the horizontal strips of fiber reinforced material disposed on the isolators and covering respective void spaces defined in part by the interior surfaces of the adjacent metal sheets and the associated metal support posts or metal end beams; insulating materials disposed within each void space; and each sidewall assembly having at least a first horizontal strip of fiber reinforced material and a second horizontal strip of fiber reinforced materials with a plurality of generally vertical corrugations formed in each horizontal strip of fiber reinforced material.