By Chris HillMore in Bathroom
Position the back assembly flush with the top and back edge of the side assemblies and attach using glue and #17 x 1-1/2-inch wire brads.
Position the shelf nosing flush with the edge and 18-1/8-inch wide end of the shelves and attach using glue and 1-1/2-inch brads. Build three shelf assemblies.
Position the shelves on the shelf supports, beginning with the bottom shelf, with the shelf nosing flush against the front edge of the shelf supports, and attach to the supports (sides and back) using glue and 1-1/2-inch brads as shown in image 1.
Position the front assembly flush with the top and front edge of the side assemblies and attach using glue and #17 x 1-1/2-inch wire brads as shown in image 2.
Check the assembly for square by measuring it diagonally and clamp in place if needed to attain square until the glue sets.