Abstract: A three dimensional folded structure, for use in lightweight design and lightweight construction, is folded at regular intervals and cannot be folded flat. The folded structure substantially extends in two directions and includes a small number of folded ply sheets. Each of the ply sheets is formed by an originally planar blank of an initially flat material lying in a zero plane and includes fold lines and polygonal holes disposed at regular distances. Each of the ply sheets is subdivided into a plurality of segments, each in the form of a polygonal planar entity that is, except at a border of the ply sheet, delimited by the fold lines and the border-edge-sections of a respective polygonal hole. Each ply sheet is folded up in two directions. During folding, the holes close into slits. Each slit of one ply-sheet is completely bridged by the other ply-sheet.

Abstract: A three dimensional folded structure, for use in lightweight design and lightweight construction, is folded at regular intervals and cannot be folded flat. The folded structure substantially extends in two directions and includes a small number of folded ply sheets. Each of the ply sheets is formed by an originally planar blank of an initially flat material lying in a zero plane and includes fold lines and polygonal holes disposed at regular distances. Each of the ply sheets is subdivided into a plurality of segments, each in the form of a polygonal planar entity that is, except at a border of the ply sheet, delimited by the fold lines and the border-edge-sections of a respective polygonal hole. Each ply sheet is folded up in two directions. During folding, the holes close into slits. Each slit of one ply-sheet is completely bridged by the other ply-sheet.

Abstract: Triangulated shells can be free-formed but are uneconomical compared to translational shells that can only be flat. Scale-trans shells are limited in terms of number and arrangement of the openings. The present invention provides a free-formed, custom-tailored shell surface and a regularly shaped, mass-produced shell surface that can be assembled fairly evenly from advantageously quadrangular mesh elements having coplanar node points. The flexibility of a triangle net of shell pieces in a large scale is combined with the evenness of a quad net for meshes in a small scale, whereby triangular meshes at the shared side of adjoining square nets are combined in pairs to give irregular quadrangular meshes having coplanar vertices. The inventive shell is especially suitable for use as an energy-saving building such as a weekend home, emergency shelter, cupola of an observatory, roof of a building or an inner courtyard, as the shell of a large multi-story building or as a sports hall or factory building.

Abstract: Triangulated shells can be free-formed but are uneconomical compared to translational shells that can only be flat. Scale-trans shells are limited in terms of number and arrangement of the openings. The present invention provides a free-formed, custom-tailored shell surface and a regularly shaped, mass-produced shell surface that can be assembled fairly evenly from advantageously quadrangular mesh elements having coplanar node points. The flexibility of a triangle net of shell pieces in a large scale is combined with the evenness of a quad net for meshes in a small scale, whereby triangular meshes at the shared side of adjoining square nets are combined in pairs to give irregular quadrangular meshes having coplanar vertices. The inventive shell is especially suitable for use as an energy-saving building such as a weekend home, emergency shelter, cupola of an observatory, roof of a building or an inner courtyard, as the shell of a large multi-story building or as a sports hall or factory building.

Abstract: The present invention relates to a building system comprising prefabricated plates for self-supporting space boundaries. To enable simple construction of load-bearing structures that are versatile in three dimensions and that enclose spaces, plates, at least some of which are disposed at different inclinations, in the form of flat, slanted prisms are joined by their side faces directly to one another and/or via bars in the form of long, slanted, square prisms; adjacent connecting faces are congruent, and the square faces of different bars, are disposed parallel or perpendicular to one another.