Actually, the accurate dimension varies with your wall space, and it’s a debated topic among lots of users. In this case, 16 inches of depth will be ideal for accommodating the height of toolboxes. That’s why we recommend you to cut the woods according to this measurement.
However, these are the simple steps of building a wall mounted garage shelves and hope you won’t have to ask how to build wall mounted garage shelves to anyone again. If you have any questions, you can feel free to use the comment section below.