Half pipe is a structure normally used in gravity high sports such as snow boarding, skiing, skate boarding, inline skating and BMX free styling. The process may take a number of days to complete and must have the right measurements or else it would endanger someone using it. To start on the project, gather all the necessary materials and tools and allocate time for the project.
- Using the layout obtained, determine the size of the half pipe one intends to build. At this point the size of the plywood and lumber to be used is also determined.
- Use the drawn layout to determine the specifications of the ramp in relation to the available space as well as the type of ramp that is being built. This enables one to determine the amount of wood that will be required as well as other necessary materials.
- Layout the framing system considering the two symmetrical sides.
- Make a bracing structure that is about 8 inches long and 4 inches wide from the stock. The base should be made in two sections of 4 × 8 inches and floor joists with spacing of about 7 and 7/8 inches apart. Lay the horizontal and vertical side bracing on the sides. The total pieces should be three.
- Using a fishing line lay out a curve of radius 5’ 7 1/2”, which will make the bowl of the half pipe.
- Make the bracing such that the radius line is the support line indicating the support areas.
- Connect the bottom supports to double up with the vertical systems.
- The cross members and the vertical supports are then connected with a small space apart where the plywood will pass through.
- Attach plywood to deck the ramp. On the ramp, glue plywood that has smooth surface while the starting point is supported by joists so that several people can ride at once.
- At the point where the vertical decking and the horizontal starting point meet, make a small blocking along the transition to minimize accidents. This is done by use of a PVC piping that is screwed onto the plywood. This will serve as a cushion within the area of transition.
- Create points of disabling since in some seasons of the year the half pipe will have to be disabled. The stability of the half pipe should be checked frequently and boards that are rotting should be replaced immediately.
After the half pipe is ready for riding regular check up should be done to ensure that all the plywood put together is in the right places and no damages are done.