Patent ID: 7520558

Claim:
A cargo box for a truck trailer that is selectively coverable with tarpaulin supported on a plurality of bows, wherein each bow has a central supporting section and spaced-apart vertically oriented ends; and wherein said cargo box comprises: a front wall; a rear wall; a pair of side walls extending between the front and rear walls, wherein each of said side walls has a horizontal upper surface and a longitudinal axis that extends between the front and rear walls of the cargo box; and a plurality of spaced-apart apertures provided in the horizontal upper surface of each side wall, each aperture being adapted to receive one of the ends of one of the bows therein; said apertures each being sized to loosely retain the one of the ends of the bows therein and permit lateral sliding motion thereof within the aperture in a direction perpendicular to the longitudinal axis of the side wall.