this instructable will show you how to easily make a perfect quarter pipe with:
4: sheets of 1/4 inch 4 by 8ply wood
6: sheets of 1/2 inch 4 by 8 ply wood
11: 2 by 4s each 5 ft 11 inches long
2: 2 by 4s at least 5 ft long.
if you want to build a 3 ft half pipe use 3 sheets of 1/2in ply wood. by over lapping the curves.
skill saw or carving saw
table saw circular saw or hand saw
200 - 300 2 inch screws.
a hammer might come in handy.
Step 1: drawing the pull in
get 6 1/2 ft of non stretchy string and a pencil
and a 6 ft board and a few screws
screw the 6 ft board into the ply wood so it looks like my picture.
make sure there is an inch of space on the ply wood between the board.
now for the string
go to the top of the board and measure one inch down from the top and but a screw in to it.
now tie your string onto the screw
and on the other end tie a pencil make sure the pencil is perfectly on the bottom of the ply wood as seen in my picture.
now keep the string pulled taught ,the pencil strait up and go up and down a couple times until you get a nice smooth line. that looks like mine.
now if you're going to use coping or not draw a little notch in the top to put your coping into if you're using a 2 inch tube make the notch 1 1/2 inches each way.