These are my ramps. I built my quarter pipe in a week or so with about 7 hours. Its my first big ramp. I didn't follow the plans exactly. I didn't put the coping on and I didn't use 3 layers. I used 1/4 partial board for the first layer and 3/8 for the second.
i added a section to the quarter pipe so it would be closer to vert. for this i took a piece of 3/4 ply wood and traced the transition from the quarter pipe. then i took 2*3s that were 46 and one half inch long and screwed them into the sides then i took a 1 quarter inch piece of plywood and screwed that to the top of my qp.
For the tabletop it took about a week too. It was very cold when i was building it. I use a old shelf that I took apart for the wood. it was built similar to the fun box that is posted with plans. I used a 8 foot trans with the supports 16 inches apart. with two layers. the first 1/4inch partial board, and the second a type of smooth wood that i found at Menard's at the bargain center for $1 for a 4*8 sheet!! i like it, although i don't know what its called. it has a 44 foot table.
i built a spine 12foot wide 3foot high qp mini half pipe ramp. it is 3foot high and has a 5foot trans. i have 2 by 4 that are 12 inches apart and the skinner side of the 2*4 on the surface. i have quarter inch partial board right now for the first layer and i will put a second layer on later.
If you have any questions about the ramps, email me at firstname.lastname@example.org
more to come..........
now i have a table top grind box that is 14 inches high and 24 inches wide. it has PVC as the coping and it has slopped sides. in total the whole thing is 16 feet long, with the table part 8. i will try to get some pics later
now i am makin a 28" high 48" wide qp with copin and fence on back! im almost done and its awesome! i finished the ramp last night! its pretty awesome i got some steel pipe for the coping and i got some sheet metal for the spot where the ramp hits the ground! its pretty cool!!!