Drag the corners, set the heights and the edge sag. The sail is form-found live, the way a real membrane takes its shape, with cloth area, side lengths and twist checks as you go. When it looks right, send the design and we engineer it for your site and wind region.
| Side | Sag % | Side m | Sag mm | Cable m |
|---|
| Item | Qty | A$ |
|---|
A guide for this layout. The firm price follows a site check of soil, access and wind region.
The sail shape on this page is solved, not sketched. Here is what that means and where it stops.
A shade sail takes the shape that is in equilibrium with its corners and edge cables. The tool solves for that shape with the force density method on a cable net: the fixing points are held, the edge cable tension is tuned until each edge reaches the sag you set, and the surface settles where every node is in balance. Move a corner or change a height and the whole surface changes, the same way the real sail would.
The checks catch the layouts that cause trouble on site. Sides that cross, corners that point inward, corners too sharp to tension, and four-corner sails without enough twist. A flat sail flogs in wind and ponds in rain, so the tool asks for one diagonal pair of corners high and the other low.
What it does not do is size anything. Post sections, footings, wall and fascia fixings, edge cables and fittings depend on the wind region, terrain and the ground at your address, and they are designed to AS/NZS 1170.2 and AS 4100 as part of the engineering. Send the design and it becomes the starting point for that work. The full scope is on the tensile membrane engineering page.
Send the corner points and the site, or call. Free scoping call, then a fixed fee for the engineering.
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