Patent ID: 7926866

Claim:
A trailer comprising: a pair of substantially vertical, spaced apart opposing sidewalls; a roof sheet extending between and mounted atop said sidewalls, said sidewalls and roof sheet cooperating to define a cargo space, said roof sheet having an interior surface facing said cargo space and an opposing exterior surface; and a plurality of elongate support beams mounted to said exterior surface of said roof sheet and extending between said sidewalls, said plurality of beams supporting said roof sheet, each said beam including: at least three contact portions attached to said exterior surface of said roof sheet; a first rib portion interconnecting a first and a second of said contact portions and defining a first channel between the first rib portion and said exterior surface of said roof sheet; and a second rib portion interconnecting the second and a third of said contact portions and defining a second channel between the second rib portion and said exterior surface of said roof sheet.