How to Build an Adjustable Plywood Shelf
- 1). Cut the plywood into the following pieces: one 30- by 70-inch back, two 12- by 70-inch sides, and six 12- by-28.5-inch shelves.
- 2). Draw two lines on each side piece. Both should go from the top to the bottom. Position one 3 inches in from one edge and the other 3 inches in from the other end.
- 3). Drill a hole every inch along all four lines. The holes should be big enough for the shaft of a 2-inch bolt. The hole layout must be identical for both sides. If you want, you can clamp the two sides together and drill them at the same time. Leave a few inches undrilled at the top and bottom of each side to allow easier screwing in the next step.
- 4). Assemble a box out of the two sides and two of the shelves. The shelves form the top and bottom of the box, sandwiched between the two side boards. Drill three pilot holes per corner, and screw the box together with 1.5-inch wood screws.
- 5). Set the box down on the floor, and lay the plywood back on top of it.
- 6). Drill pilot holes every 4 inches along the edges of the back, and screw the back to the box.
- 7). Set the shelving unit upright, and insert bolts through both sides where you want to position the shelves. Count the number of holes from the top and bottom to ensure that all four bolts for each shelf are at the same height.
- 8). Thread a nut onto each bolt to hold it in place, tightening it all the way to the plywood. The nuts are what the shelves rest on. Try to position a flat edge facing up.
- 9). Set a shelf on each set of four nuts. You have four available shelves, plus a fifth created by the bottom of the unit.