Side rail structure

1. A one piece, integrally formed, side rail structure for use in forming a portion of a flat bed trailer, said side rail structure comprises

a floor section,

an outer side rail wall integrally formed as one piece with said floor section such that the floor section and the outer side rail wall form an L-shape, and

a rub rail which is integrally formed as one piece with said outer side rail wall.

2. The one piece, integrally formed, side rail structure as set forth in claim 1 wherein said side rail structure is formed of extruded metal.

3. The side rail structure of claim 1 , wherein the rub rail has a generally rectangular cross section.

4. The side rail structure of claim 1 , further comprising one or more mounting webs protruding downwardly from a lower surface of the floor section, wherein the mounting webs are contactable with a frame member of the trailer.

5. The side rail structure of claim 1 , wherein the outer side rail wall comprises an inner surface, the inner surface comprising at least one mounting rib for contacting a frame member of the trailer.

6. The side rail structure of claim 5 , wherein the at least one mounting rib comprises an upper mounting rib for contacting an upper surface of the frame member and a lower mounting rib for contacting a lower surface of the frame member.

7. The side rail structure of claim 6 , wherein a generally vertical weld between the upper mounting rib and the lower mounting rib rigidly affixes the side rail structure to the frame member.

8. The side rail structure of claim 1 , wherein the rub rail has an inner rub rail wall formed by the outer side rail wall.

9. The one piece, integrally formed, side rail structure of claim 8 , wherein the inner rub rail wall is substantially parallel to the outer rub rail wall.

10. The one piece, integrally formed, side rail structure of claim 1 , wherein the rub rail further comprises an outer rub rail wall which is substantially parallel to the outer side rail wall.

11. The one piece, integrally formed, side rail structure of claim 10 , wherein the outer side rail wall, the outer rub rail wall and the tubular rub rail extend along a side of the trailer.

12. The one piece, integrally formed, side rail structure as set forth in claim 10 wherein said rub rail further comprises an upper connector wall and a lower connector wall which connect said outer side rail wail with said outer rub rail wall.

13. The one piece, integrally formed, side rail, structure as set forth in claim 12 wherein a first plurality of spaced apart openings are formed in said upper connector wall and a second plurality of spaced apart openings are formed in said lower connector wall, said first plurality of openings being aligned with said second plurality of openings.

14. The one piece, integrally formed, side rail structure as set forth in claim 13 wherein said first plurality of openings includes a plurality of relatively small openings which are interspersed with a plurality of relatively large openings.

15. The side rail structure of claim 12 , wherein the outer side rail wall is spaced apart from the outer rub rail wall via the upper and lower connector wall.

16. The side rail structure of claim 15 , wherein the outer side rail wall, the outer rub rail wall, the first connector wall, and the second connector wall define a substantially rectangular space.

17. The side rail structure of claim 16 , wherein the substantially rectangular space extends along the sides of the trailer.

18. The side rail structure of claim 17 , wherein the upper connector wall is offset from the floor section.

19. The side rail structure of claim 1 , wherein the rub rail is tubular in shape.