Our aluminum fence is rackable, which means that it has been engineered to automatically slope with the grade of your yard, up to 10in per 84in panel. There is nothing special you need to do to slope your aluminum fence. It will angle to the position you set it.
Note: If using swivel brackets to attach panels to posts, you will not be able to rack panel rails for sloping ground. Gates are not rackable like panels and must be installed on a relatively flat surface.