Constructional assembly part made of flat elements

摘要

The flat constructional elements are in the form of foldable cut out sections (21). The base surfaces are joined by side flaps (3,11) extending over the length and breadth. Between the base surfaces and the flaps are grooved lines.The flaps have equidistant punched out holes near the edges. The intersecting points of the grooved lines have cavities on the flaps. The sides of the base surface have punched out holes which, when the flaps are folded by 180 deg. around the grooved lines, are flush with the holes punched out of the flaps.