Lay two 28-inch boards flat and parallel. Space them 23 inches apart. Screw a 30-inch board perpendicularly to the 28-inch boards so the 30-inch edge is flush with the ends of the 4-by-4 boards. Screw the last 30-inch board to the other two 28-inch boards in the same fashion. The 2-by-6 boards will provide support to your table top.
Stand both sets of 4-by-4-inch boards upright so the 30-inch boards are parallel and 27 inches apart. Screw your 36-inch boards perpendicularly to the 30-inch edges of the 2-by-6-inch boards. The 36-inch boards should be parallel and spaced a ½-inch apart.
Screw one of your 2-by-8-inch boards to the 4-by-4-inch boards, so the 36-inch edge is flush with the table top. Screw the last 2-by-8-inch board to the opposite side in the same manner.
Apply the stain to your project and let dry according to instructions.