Read more: 8 Hammer Types And When To Use Them Look for a shade sail that's more cloth than canvas. You need something lightweight that doesn't pull on the posts too much. For example, this ...

Shade sails are installed by stretching the fabric and using tension to affix the corners of the shade to mounting points ...

SunCraft designed a 50-square-meter square motorized retractable shade sail mounted on three poles and one bracket attached ...