Abstract: Methods and means for manufacturing, packaging and assembling a modular railway car includes fabricating the floor, sidewalls, roof and end frame components for a railway car, each component having areas capable of receiving weld joints or bolt openings to provide interconnecting means. After manufacture, all the components are packed for shipment in an open bottom container with the floor secured to the sides of the container providing the support for the other components with the roof on top. At the point of destination, the container is placed on a jig or fixture on which the components are assembled. After removal of the container, the top roof is removed to permit the sidewalls and end frames to be raised and assembled in place. The roof is then connected. All the components may be interconnected by bolting or welding.