I like that rack. The problem I have with bowl down racks is they tend to let the pipes fall out. That rack won't let that happen.
That would be built like a table top. For each shelf start with the desired length then measure in 3/4" from this point measure the distance center to center for the pipes, I would start with 1 3/4". Then on the other end there will be a wider space you can adjust holes. If the layout is good then drill.
What you will need to know to start is the quantity of pipes then the desired number of shelves. Now figure the board feet of material needed. Now to chose the material.
From the picture I would estimate 3bf maybe 4bf would be close. That would depend on the width and lengths of the shelves.
It might actually be easier to find someone who does woodworking in your area and get a quote. That way you can give them specs and get it made from some good high quality wood. You'll pay a bit for it, but I guarantee it will last as long as your pipes will with no issues.