The invention relates to the field of spherical structures. More particularly, this invention relates to spherical structures assembled from a plurality of convex-concave elements. Spherical structures as referred to herein include structures that have either a continuously curved or a faceted spherical shape, as well as structures that are semispherical, such as domes, or completely spherical, such as globes. Spherical structures have many and varied applications, but offer particular advantages as spatial enclosures. Not only is the sphere aesthetically pleasing, but it possesses certain structural advantages that make it stronger, more stable, and better able to resist certain forces, such as those resulting from wind, earthquakes, and other natural phenomena, than rectangular structures of comparable size. Nevertheless, despite the structural advantages of spherical over rectangular structures, spherical structures are not commonly used as spatial enclosures and have been constructed primarily for very special purposes. Examples of such special purpose spherical structures are the ancient domes that crown great cathedrals and the arches that impart strength to load-bearing structures such as aqueducts and bridges. Typical housing structures are, however, generally rectangular or cylindrical structures. Several reasons for the lack of use of spherical structures as housing or shelter are based on the fact that such structures are geometrically very complicated and difficult to build; they require special knowledge of spherical geometry and considerable mathematical ability. Thus, making such structures requires specialists and extensive working or shaping of the individual elements, resulting in a structure that is more costly to construct, relative to a rectangular structure of comparable size.

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