Ok here's the list of what I used (already had PVC primer and glue):
1/2" schedule 40 10' length
8- 1/2" 90* elbows
2- 1/2" T fittings
2- 1/2" 45* elbows
To fit the 4" box bumper I cut 4 pieces of PVC 3 1/2 inches for each mount(8 total 3 1/2" pieces.).
(As you can see in the pic the 3 90* elbows and the t fitting fit over the bumper and the uprights have the 45* elbows that join to the bumper mount.)
Then I cut 2- 1 1/2" pieces to join the uprights to the bumper mount with the t fitting and 45* elbow.
Uprights are 29 1/2" each, and the top cross brace is 30" joined by the 90* fittings. Very easy to make or adjust measurements but I used the entire 10' section. I glued all fittings except the 45* to the t fitting so I can disassemble the rack and store it inside. The reason i painted it black was because I was messy with the purple primer and that on the white looked like junk. So I had left over paint and wallah. To drill the holes for the clothes line I taped the 2 uprights together( my clamps would securely hold the 2 pipes) and used a small bit for a pilot then followed up with a 1/4" bit. It took about 25 minutes to make. I didn't have any official drawings or design. It was winging it off the top of my head off similar racks. So if this thing fails miserably down the road I'm not out a lot of time or money.