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. building supplies: skill saw or carving saw table saw circular saw or hand saw drill 200 - 300 2 inch screws. a hammer might come in handy.