Patent ID: 7975325
Filing Date: 2011-07-12
Classification: E04H

Abstract:
1. A uniform base structure creating a stable platform on an upper surface thereof capable of supporting the weight of individuals, the base structure comprising: a bottom portion contacting a supporting surface in at least two locations; a top panel forming the platform on an upper surface thereof; and a formed bottom panel bridging the at least two locations of the bottom portion contacting the support surface, the bottom panel having a plurality of primary ribs and a support web extending between the primary ribs, the support web extending upwardly such that an upper portion of the support web contacts a lower surface of the top panel, wherein the support web has a plurality of non-symmetrical arched portions extending generally parallel to one another between each pair of primary ribs and the top panel such that the arched portions are generally perpendicular to the primary ribs, each non-symmetrical arched portion extending only a longitudinal portion of the length of the primary rib, the plurality of non-symmetrical arched portions alternating in direction extending down the length of the primary rib, thus creating an alternating pattern of contact points with the top panel.