Abstract: A polyhedron-like structural assembly comprises a plurality of polygonal frames installed in upright position on each of a pair of opposite sides of a structural assembly that is square-shaped in a plan view, a plurality of frames having H-shaped cross-sections and connecting the polygonal frames to form a plurality of triangular planes therebetween, a plurality of polygonal flat plates attached in the triangular planes to provide polyhedron-like upper walls and polyhedron-like side walls between the polygonal frames, and a joint disposed in the center of the assembly and having a plurality of arms formed to fit within the frames.

Abstract: A dome constructing method comprising the steps of assembling a triangular frame, which is the fundamental unit for a polyhedral skeleton, by using three joints and three frame members with the three joints used as the apexes and the three frame members used as the sides and with the triangular frame in contact with the ground, assembling new triangular frames around the ground-contacting triangular frame by using similar frame members and joints, thereby assembling the polyhedral skeleton of a multipyramid, such as pentagonal pyramid or hexagonal pyramid, with one joint that is positioned at one apex in the ground-contacting triangular frame being used as the apex and with the ground-contacting triangular frame used as one surface, wherein each time the polyhedral skeleton for the multipyramid is thus assembled, the same is turned to bring a new triangular frame other than the ground-contacting triangular frame into contact with the ground and then the assembling operation is repeated to assemble a polyhedra