Patent ID: 7591108
Filing Date: 2009-09-22
Classification: E04B

Abstract:
1. A double-curved load-bearing prefabricated shell, the shell comprising: a plurality of triangular sherds, wherein each triangular sherd is formed as one part of a bisection of an ordinary quadrilateral section of a surface defining longitudinal and transverse directions, the ordinary quadrilateral section having four section sides and four corner points and a net of first and second arrays of curves intersecting at node points of a C wherein two sherds are fused into a double sherd having a continuous surface transition at the respective identical cutting curves, which form a cut-seam curve such that respective node points of each of the respective cut triangular meshes are connected and that each of the cut triangular meshes are fused into a quadrangular seam mesh having four coplanar node points and two sets of non-parallel opposing chords; and wherein at least six of the plurality of sherds are disposed so as to meet at one point shared by one of their respective both cut corners so as to form a surface whose node points define a C