I actually studied the instructions found in the link below for the four door rack so this post will not be too detailed on that since you can modify it as needed.
Original here: Jeep Wrangler 4 Door Rack
But I followed the addendum posted lower on that page by “Charlieandheather”
I ended up modifying it a little bit more but it didn’t really matter since I had to pull it apart once I decided to go to a 2 door rack on the lift.
I’ll give the material and measurement for just what ended up as the final product on the lift cart. I then used the left overs for the second rack.
1 Lift cart from Harbor Freight $130ish due to sale and after coupons
Using the 1 inch PVC as in the original instructions:
6 pieces 9” long (for uprights)
3 pieces 12” long for top cross sections.
4 pieces 7” long for bottom. (more room than the 6” in the original plan)
2 pieces each “t” sections
10 pieces each 90 degree angles.
I used the pipe insulation and put it on while putting it together so I didn’t have to slice it. I didn't like the way it sounded while rubbing and sliding up the door so I will change this to something softer. Micro fiber wrapped around it or something.
I did not use the bottom cross sections as in the original since I mounted it to the cart with U bolts and knew it was not going anywhere. Also note the width of the original 12” pieces for the top is perfect for the front doors but the rear door bottoms are smaller at the bottom so 8” to 10” would be perfect for either door. I will just need to put a section in the middle for use with the rear doors.
To be honest, now that I’m done with it, I wish I had just used some 2 X 4 wood and mounted it right to the cart and just built some uprights. This will work for now, but I do worry about the PVC strength with the lift up high. Seems pretty strong though and the lean inwards and not out.