HYPARS are structural shapes curved in two directions as Hyperbolic Parabola. They form part of a family of single layer shell structures (or double curved lattices) that cover long spans with a light-weight structural network, acting in tension or compression. The closely spaced tubes directly support cladding without the need for intermediate or secondary trusses. This results in a visually appealing roof profile, a very shallow roof depth & lower cost due to reduced material mass. Hypar roofs can be designed & built to any elevation or plan geometry and multiple structures can be combined to achieve a ribbon-like appearance. The edges of each Hypar are restrained & foundations are designed to resist thrust & overturning movement under all service conditions. Hypars also provide the aesthetics of tensile fabric structures, but with the added structural integrity needed in regions subject to hurricane or snow loads.