How to explain this curvature?
The shade sail naturally has curved edges to be properly tensioned. The curvature brings a certain ease to the tensioning of the sail. In fact, the curvatures allow a certain margin of maneuver with respect to the axes of tension.
In the case of an unstretched shade sail, it would form a pocket that would be both unsightly and sometimes quite annoying. Indeed, in the case of a water-repellent shade sail, it would form a water pocket in case of rain, which would create strong tensions capable of seriously damaging your shade sail.
Curvatures are also there to allow maximum agility in the sail. In the case of a shade sail with adjustable masts, you will be able to adjust the shade sail in height to maximize the shade relative to the position of the sun. Without this configuration of sail with curvature, this would not be possible since the tensions would be too strong at certain positions.
For curtain wall systems, this curvature is also essential to ensure proper operation of the system.
In addition, the curvatures allow the shade sails to have a dynamic and aesthetic style. Keep in mind that the shade sail is there to transform your terraces into spaces of life and conviviality, all with design and solidity.
How is the curvature calculated?
Be aware that for triangular, trapezoidal, rectangular, square or diamond veils, the sides of these geometric shapes have a negative curvature of 5% .
When creating custom shade sails (via the 3D software or the online configurator) we automatically take into account this curvature as essential to the proper installation of your shade sail. Thus, whatever the material, the size or the shape of your shade sail, the latter can not be entirely flat.