US Patent 7234402 Foldably constructed force-resisting structures

A foldably constructed force-resisting structure comprises a top member and a bottom member foldably constructed and assembled from one or more blanks of sheet material, preferably corrugated paperboard, initially in a flat condition prior to folding. The bottom member includes a base panel and at least one interior support flap folded from the base panel to provide vertical support for a base panel of the top member disposed at least substantially parallel to the base panel of the bottom member. The top and bottom members may be interlockingly secured in various ways by interengagement of various portions of the one or more blanks themselves.