Patent ID: 7017205

Claim:
A mattress assembly constructed substantially of plastic material, comprising: a. a mattress foundation comprising: i. a generally planar and essentially rigid top surface having an upper side and a lower side, the lower side of the top surface including at least one reinforcing fin, oriented perpendicularly to the lower side and extending along a portion of the lower side; and ii. at least one essentially rigid sidewall, having a lower edge and at least one pair of grooves disposed on opposing portions of the at least one sidewall, the sidewall extending substantially along the perimeter of the lower side of the top surface, depending downward from the top surface, defining a cavity; b. a frame assembly comprising a plurality of ground support members supporting the foundation, depending downward from the lower edge of the at least one sidewall, holding the foundation above ground, and maintaining the top surface in a substantially horizontal orientation; and c. at least one brace connecting opposing portions of the at least one sidewall, said at least one brace having end sections configured to latchingly engage with the grooves so as to prevent outward deflection of the opposing portions of the at least one sidewall.