Patent ID: 7140670

Claim:
An overhead frame structure comprising: two spaced-apart side frame members, each side frame member having at least one protrusion, each protrusion on one side frame member extending toward an opposing protrusion on the other side frame member, each protrusion having segments extending longitudinally thereof, the segments providing each protrusion with a corrugated configuration; one or more cross members, each cross member extending between a pair of opposing protrusions, each cross member having end portions adapted for receiving said pair of opposing protrusions therein, each end portion having a wall having segments extending longitudinally thereof, the segments providing each wall with a corrugated configuration, each wall engaging one of said pair of opposing protrusions, each end portion of each cross member having a longitudinally extending upper portion and lower portion, the lower portion comprising the wall having the corrugated configuration and the upper portion extending about the lower portion; and fasteners releasably securing said cross member end portions to said protrusions.