This is a clever and astonishingly well built rack. Comes with a mounting template that allows you to correctly position the 2 small mounting brackets that the rack attaches to.
The template for the holes to drill is nowhere near accurate. Would have been better if designed for 24” ceiling joists.
They even have a hook you can attach and hang from a closet. This is the best way to dry sweaters flat, they dry in 1/2 the time.