Edge glue the six 1-by-5 oak boards together by first wiping the 30-inch edges clean with a damp cloth, then applying a bead of glue. Use four clamps nine inches apart to secure. Tap boards with your rubber mallet to be sure that all sides boards are flush, including the ends. This will be your table top. Let the glue dry according to instructions.
Drill four evenly spaced 3/32-inch holes through the 2-inch-by-30-inch sides of each 2-by-4 board. Counter sink a 3/8-inch hole to a depth of 1 3/4-inches. Pre-drill a 3/32-inch hole for every screwing application in this project.
Remove the clamps and lay the top flat and horizontal. Lay your 2-by-4 board vertically on the table, so it is parallel with and 8-inches away from, the left 30-inch edge. The counter sunk holes should be facing up. Lay the other 2-by-4 board 8-inches from the right side in the same fashion. Screw through each hole into the top.
Stand a 3-by-3 board vertically so it is on the bottom right side of the left 2-by-4 board. One side should be flat against the 2-by-4, the other 3-inches from the end. Screw through the 2-by-4 into the 3-by-3 to secure the first leg. Screw the next leg 3-inches from the other end in the same fashion. Repeat this with the other 2-by-4 board 3-by-3s to finish your legs. Legs should be square and between the 2-by-4s.
Screw your 1-by-3 board perpendicularly to the two 3-by-3s that are attached to the same 2-by-4. It should be 15 inches from and parallel to the 2-by-4s. Repeat this process with the other two legs.
Place your 2-by-3 board perpendicularly between the middle of the 1-by-3s. Screw 1-by-3s into the ends. This will provide support.
Turn your table upright and use your chisel to scrape off any excess glue. Try not to gouge the wood. Sand the entire project with medium sandpaper, then with fine sandpaper.
Apply wood stain and let dry according to instructions.