The first ramp I ever built was with a bunch of friends when I was a freshman in high school. It was a 16' wide mini. 8' of it was only 3' high with a parking block for coping, and the other half was 4' high. I really learned to skate ramps on that abomination.
We "acquired" all the 1/2" and 3/4" ply for the templates, decks and first sheet from a local "source". Then, one of my friends was working at a furniture warehouse over the summer. They brought all the furniture in on these industrial pallets made of 2"x6"s. We spent weeks taking apart pallets, pulling out nails and separating them into 2' sections that we could use for all the supports.
So, the ramp was 16' wide- built in 2' sections and braced with 2x6's. It was a goliath of a ramp. So sturdy that when the guy had to tear it down like 15 years later, he ended up just lighting the fucker on fire because there was no easy way to demolish it. And that is after 15 years of Ohio winters. We totally over-built the thing.
a fun box in the backyard grass to grass. killer.
What about 4' with a tombstone/extension or two? You get two heights to skate, and low-to-high tricks are super fun.4' is kind of a cost savings thing too. You only need one sheet of ply for each trannie template. The extra foot throws all the measurements out of whack.
If I had had the space I would have built a 16' wide. 8' of it 4' high and 8' of it 5' high
This was the last Frankenramp I localed at. I wish I could find pics of the entire thing. it was nuts.