Playground Shade Sails
Colourful and practical sail shade solutions in vibrant colours
While a popular design, A&S Landscape do not recommend triangular-shaped sails. Any true tension membrane structure has a minimum of four attachment points with sufficient height difference, this allows three-dimensional shape in the fabric thus obtaining even tension (pre-stress) over the surface of the fabric. No matter how high or low each attachment point, a triangular fabric surface is still in a flat 2D shape. You need the fourth attachment point and height difference to generate a 3D shape. Flat structures stretch over time with gravity load and sag between the catenary wires, resulting in the fabric flapping in the wind and increasing the corner attachment loads. The amount of shaded area produced by triangular structures is also poor because of the narrow angles at the corners, produced when the catenary cable edge curvature is installed.
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