As you attach the arms, use a speed square to make sure they are exactly perpendicular to the wall cleat (this is essential). To attach each perpendicular arm, apply wood glue to the ends of the arm, then position it so it is exactly perpendicular to the wall cleat, and secure it with a pair of 2 1/2-inch screws driven through the back face of the wall cleat and into the end of the arm. (This recess will allow for the installation of a trim piece). Beginning from the left, the first arm should be spaced 10 inches from the end of the wall cleat, the second arm at 24 inches, and the third arm should be set back 3/4-inch from the right end of the wall cleat.

Position the 40-inch long 1x3 on edge on a flat surface, then position three 2x3 cleat arms on edge against the face of the wall cleat, so they extend out at right angles. Very careful sketching will help you accurately plan a shelf of any size you choose.īegin by building the right side cleat. For example, a 1x3's actual dimension is 3/4 x 2 1/2 inches. If you are adapting this design to create a shelf with different dimensions, keep in mind the difference between the nominal dimension (how it is labeled and sold) and the actual dimension of lumber stock. The Spruce Home Improvement Review Board.

Corner wall shelf