Patent ID: 7205066

Claim:
A structural element comprising: (a) a first member having an inner surface and an outer surface; (b) a rib member having a first end and a second end; (c) a first rib-receiving member integral to the inner surface of the first member, wherein the first rib-receiving member comprises a plurality of rib-receiving elements wherein the rib-receiving elements are arranged step-wise relative to each other to form the first rib-receiving member, the rib-receiving elements having engagement openings therein for receiving the first end of the rib member, and a plurality of cover sheets, with each cover sheet located external to the first member such that each cover sheet projects from the inner surface of the first member, each cover sheet having an inner surface and an engagement opening therein for receiving the first end of the rib member, and wherein the rib-receiving elements are stacked under the cover sheets, and at least one rib-receiving element has an outer surface which is integral to the inner surface of at least one cover sheet; and (d) at least one anchoring element interconnecting the rib-receiving elements of the first rib-receiving member.