Cut The Pieces
Download the cut list and follow it to make the assembly pieces. First, make all the straight cuts for the shelves. Then set the miter-saw blade to 10 degrees and cut the uprights and cleats at parallel angles.
Build The Shelves
Run a bead of wood glue along the back edge of a shelf, butt the shelf into its backpiece, and tack it in place with 2-inch brad nails. Glue and tack the sidepieces onto the shelf in the same manner, making sure they’re flush at the back and bottom. Wipe away any excess glue.
Attach The Cleats
Starting at the bottom of the uprights, glue the cleats in place, using scrap 1 x 3s to block out space for the shelves. Secure the cleats with 1¼-inch brad nails. To make the tops of the uprights sit flat against the wall, trim ¼ inch off their back edges, perpendicular to the 10-degree end cuts.
Join The Shelves
Stand up the tiered shelves on their backs, arranged shortest to tallest, on a level work surface. Dry-fit the shelves into the notches on the uprights. Make sure that the trimmed wall-side edges of the uprights rest flat against the work surface. Now glue the shelves to the uprights and drive two 1¼-inch screws through each shelf’s sidepieces and into the uprights. Fill the fastener holes, then sand and paint. To finish, add non-skid foam pads to the feet and the wall-side edge of each upright.