Sep 18, 2007 · Build the Legs. Cut ten 2x4s to 10 inches, and another ten to 13½ inches. Screw the shorter 2x4s to the longer ones to create the legs. Use a C-clamp to hold the leg to the platform’s frame, then bore a 7/16-inch-diameter hole through both. Remove the clamp and hammer a tee-nut into the hole on the back of the leg.