Using a measuring tape, measure out the desired length of shelves. This will also be the measurement for your ledger. Transfer measurements to either 5/4 board or MDF board.
With a chop saw, cut lengths of wood for shelves. Using a table saw, rip down the 5/4 board or MDF to 2 inches; this will be the thickness for all stock pieces.
Measure and cut ledgers, down supports and angle braces from 2-inch stock. For a finished look, angle the bottom edge of each down support. Make a 45-degree cut on the edge of each angle brace.
Measure 4 inches from the outside edges of each ledger to determine the position of down supports. Using a pocket jib, attach down supports to each ledger.
After supports and ledgers are assembled, measure and cut out the appropriate number of shelving units for assembled supports.
To determine placement of the first shelf in the series, measure and mark the height of the backsplash, which is always 18 1/2 inches above the countertop. Then allow 10 to 12 inches between the first shelf and the upper shelf.
Set first ledger in place, check with a level and mark the position with a faint line. Use trim screws to mount the ledger. Screw the shelving unit onto the ledger. Check shelf with a level. Attach angle braces. Repeat installation steps for remaining shelves.