Railroad car and floor structure therefor

A railroad car floor assembly, said floor assembly including:

• a floor sheet having a lengthwise direction and a transverse direction;
• an array of cross-members, said cross-members being mounted to extend in said transverse direction;
• an array of stringers mounted to said cross-members, said stringers being mounted to run in said lengthwise direction;
• said floor sheet having an upward facing lading supporting surface;
• and
• said array of stringers being mounted flush with said array of cross-members.

A railroad car floor assembly, said floor assembly including:

• a floor sheet having a lengthwise direction and a transverse direction;
• an array of cross-members, said cross-members being mounted to extend in said transverse direction;
• an array of stringers mounted to said cross-members, said stringers being mounted to run in said lengthwise direction;
• said floor sheet having an upward facing lading supporting surface;
• said floor sheet defining an uppermost flange of said cross-members;
• and
• said floor sheet defining an uppermost flange of said stringers.

A method of assembly of a railroad car floor assembly, the floor assembly including a floor sheet having a lengthwise direction and a transverse direction, the floor sheet having an upper surface upon which to support lading;

• an array of cross-members;
• and an array of stringers, said method including:
• welding the stringers to an underside of the floor sheet with welds running in the lengthwise direction of the floor sheet;
• and
• welding the cross-members to the underside of the floor sheet and to the stringers with welds running in transverse to the floor sheet.