How to Build a Wooden Jump Ramp

Measure 8 inches down on the upper right hand corner of the ¾-inch plywood, and push in a thumb tack. Tie a string around the tack and tie the other end to a pencil so that the tip of the pencil is 40 inches from the tack. Strike an arc starting at the bottom right-hand corner. Be sure to create the arc that is appropriate for your jump uses. A full 90-degree arc may be too difficult for some skaters. To decrease how drastic your jump ramp is, place the tack closer to the upper right corner and/or increase the length of the string. Then strike an arc from the upper left side and draw down until it connects to the original line. This is the line you will cut on.

Clamp both pieces of plywood together with the marked line visible. Be sure all edges are flush, and then make your cut with the jigsaw.

Remove the clamps from the plywood and stand both pieces upright 30 inches apart. Screw a 1- by 4- by 30-inch pine board at the top of the ramp perpendicularly by screwing through the plywood into the 1-by-4. Follow a pattern of spacing the boards that are angled with the ramp, placing them 8 inches apart.

Screw the 1/8-inch plywood to the each of the pine 1-by-4s 4 inches from each end. Start at the bottom and be sure the outside grain of the plywood is parallel with the pine boards. Use your skill saw to cut off overhanging plywood at the top of the ramp. Place the second sheet of plywood over the first, but screw directly into the 3/4-inch plywood on the ramp. Cut off any extra overhanging plywood.

Screw the 2-by-8 pine board between the 3/4-inch plywood 24 inches from the top of the ramp and flush with the edges on the back of the ramp.