摘要:
A composite box structure mounted on and attached to a railway car underframe to form a temperature controlled railway car. The composite box structure defined in part by an exterior metal surface, interior side stakes and at least one layer of fiber reinforced material attached to the side stakes. Insulating material may be disposed between the side stakes, the exterior metal surface and the at least one fiber reinforced layer of fiber reinforced material. The insulating materials provide resistance to heat transfer between the interior and the exterior of the composite box structure. A primary floor assembly and a secondary floor assembly may be mounted on the railway car underframe.
摘要:
A railroad box car has a truck-carrying railroad chassis and walls on the chassis forming a closable longitudinally extending space that is heated or cooled. According to the invention the walls are each formed of an inner skin, an outer skin, and a mass of cellular plastic foam between the skins bonded at least to an outer face of the respective inner skin. Plastic struts holding the inner and outer skins apart. The walls include a horizontal floor, a pair of upright and transverse end walls, a pair of upright and longitudinal side walls each formed by two slidable doors, and a horizontal roof. Each outer wall is spaced from the respective inner wall.