Patent ID: 8764101

Claim:
A load bearing panel member comprising: a first portion including: a first plurality of rib members forming a grid pattern on the first portion; wherein the first plurality of rib members are configured as solid ribs; a second plurality of rib members positioned adjacent the periphery of the first portion; a third plurality of rib members extending toward the periphery of the first portion, wherein each of the third plurality of rib members is non-orthogonal to another of the third plurality of rib members and non-orthogonal to each of the second plurality of rib members; wherein a tubular cavity is defined within each of the second plurality of rib members and each of the third plurality of rib members; an appearance surface portion attached to the first portion of the panel member; and a second portion attached to the appearance surface portion such that the appearance surface portion forms an integral hinge between the first and second portions of the load bearing panel member.