Building a Family Bike & Skate Ramp

Today we build a family-friendly kicker ramp for bicycles, skateboards, and scooters. The family ramp is fun for all ages, easy to move, and still capable of some serious boost! Because the curve does involve a little trial and error, I'm leaving rough measurements and materials below. Have fun, and improvise to make your ramp even better than mine.
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MATERIALS
1 4x8 sheet of plywood 23/32
4 2x3's
1 5/8 drywall screws
OPTIONAL MATERIALS
Sheet metal
Casters
Finishing washers
MANDATORY TOOLS
Drill
Jigsaw
OPTIONAL TOOLS
Circular saw or Mitre Saw
Sander
Metal cutting blades for jigsaw
DIRECTIONS
Trace the shape of your ramp on the plywood. Mine was 6 feet long and 1 foot high, with the main transition being 4 feet and the back slope at 2. Use the first cut to trace the second, and make sure to use as little of the plywood as possible. If you do it tightly and neatly, you can get a 28" wide surface out of the rest of it.
Cut your beams 1 inch shorter than the surface. I my case the beams were 27" since the surface was 28". Cut as many beams as you can out of the 2x3's, and use them to frame out the ramp. Use two on the bottom and the rest on the transition. Use two drywall screws per beam.
Soak the plywood water, or keep it wet for 2 hours. Lay it flat on the ramp, fasten one end with 4 screws, and work your way up the ramp beam by beam. Bend it slowly and use patience, spraying it down if need be. Going too fast or using too tight of a curve will cause the wood to break.
Cut a piece of sheet metal as wide as the ramp, take off the sharp edges with a file or grinder, and screw it into the bottom of the ramp using the finishing washers. If you are only riding this with bicycles then this may not be necessary, however it does protect the bottom of the ramp.
The easiest way to add casters to the ramp is to screw 3 of them into the side in a triangle configuration. By tilting the ramp on to the casters, you can wheel it around. Optionally, you can add a handle or cutout to make this easier.
Thanks to my sponsors for helping make this video possible
Box Components
Diamondback Bicycles
Slime Sealant
And thanks to additional contributors
Ryobi Tools
ryobitools.com/nation
#RYOBINationRocks
Park Tool Company