I got this pipe clamp rack idea from this months Wood magazine. I decided to do double rows, instead of a single row. This made the 3/4 inch plywood feel a bit flimsy. So I used some 11 by 1 by 3/4 oak scrap to mount and reinforce the racks. I might have gotten a bit carried away. But it is a solid safe setup. It is nice to have my pipe clamps in one place. And not tucked into every corner and in my way.