Patent ID: 6904848

Claim:
A composite box structure mounted on a railway car underframe comprising: a floor assembly mounted on and attached to the railway car underframe; a pair of side wall assemblies and a pair of end wall assemblies attached to the floor assembly and the railway car underframe; each side wall assembly and each end wall assembly having an exterior surface formed from a plurality of metal sheets; foam insulation bonded with interior surfaces of the metal sheets; a temperature control unit mounted on one of the end wall assemblies; a roof assembly attached to and coupled with the side wall assemblies and the end wall assemblies opposite from the floor assembly; an air plenum assembly attached to and extending from an interior surface of the roof assembly; an interior bulkhead disposed adjacent to and spaced from the one end wall assembly to provide portions of an airflow path to return air from an interior of the composite box structure to the temperature control unit; and a first end of the air plenum assembly coupled with a portion of the interior bulkhead to provide portions of an airflow path to supply air from the temperature control unit to the interior of the composite box structure.