Building a quarter pipe is very hard. You have to have the right tools and the wood has to be bent just the right way so it doesn't break. It would be easier to order online or go to a sporting goods store that might have one.
Probably between 100 to 200 dollars depends in where you get the wood
itll take some money but just make a down ramp on s medium angle and a then a quarter pipe
there are 3 big pieces that u need to hold together using the rods in the kit {u clip them into the bottom.}
You could sell a nice quarter pipe on ebay for 100 or 150 dollars. The person you are selling it to should be close enough so they can pick it up themselves.
90 ( 1/4 of 360 )
It equals 3/4" in length.
type it in on google and find out.
the cheapest is around 400 bucks
Every time! lol Seriously a 10-inch pipe is 5/4 of an 8-inch pipe
If you had been advised why ask again?
3/4 inch steel pipe if making a strong double layer frame.
For proper fall. Pipe should slope 1" for every 8'.