I found the plans for how to build this quarterpipe online at www.xtremeskater.com/quarterpipeplans. The plans are free and fairly easy to understand. We built this quarterpipe over a couple of afternoons and in total probably spent 5 or 6 hours on it. Maybe less. It didn't take very long. I believe we spent around $200 - $230 on materials.
We didn't take a lot of pictures but here are some of the ones we did take during construction:
We used sidewalk chalk to get a 90 degree square on the driveway. Crude, but it worked.
Then used a string and a pencil to draw the slope of the pipe onto the plywood.
We cut the sides out of one piece of 3/4" plywood. After the first one was cut we used it as a template for the second one.
Then we tied the sides together with a couple of 2x4's.
Then filled in with the rest of the 2x4's.
We used some 2x6's and another 3/4 sheet of plywood to build the deck.
Then we connected the deck to the ramp. Not seen is the effort required to get the deck up there. The deck is supported in the back by two 4 foot 4x4's.
Installed the ramp deck. Once again, not seen is the effort involved in this. All I can say is that you can't do this by yourself. You need at least two people and three is better.
Here is a close-up of the coping.
This is kind of a blurry picture but I wanted to show the additional support put on the back of the frame to keep it all tight.