Load-Bearing Furniture from Folded Material

An item of load-bearing furniture made from lightweight, foldable, and typically inexpensive materials (such as corrugated containerboard) comprised of:

• one or more supports with bevelled crenellations along at least two upper edges;
• one or more hollow beams in the form of a flanged triangular prism, each made from a planar panel divided into at least five sections along four score lines, with the flange portion comprised of a minimum of two sections of the panel whereby the surfaces of their interior faces are in contact with one another and nearly coplanar;
• arrangement of said beam(s) such that they are laid across the crenelated supports with their triangular cross sections nesting between the bevels, and the flanges being received by the slots formed between the bases of the crenellations;
• and whereby optional notches in the edges of the flanges allow portions of the flange edge to extend beyond the bases of the crenellations, thereby restricting the lateral displacement of both the crenellated supports and the beams.