From Under-Stair Shelving · Step 8 of 10 · Video by RRR Woodworks

Showing 5:42–6:03 of the source video.
With the face frame attached, the reinforced shelves can now be permanently installed. The shelves are inserted into the dados, sliding them through the openings in the face frame. Since the shelves are fixed, apply wood glue to the dados and the mating edges of the shelves. Push each shelf firmly into its dado until it is fully seated and flush with the face frame. Use clamps or brad nails to secure the shelves if necessary, ensuring a tight fit.
This video provides a detailed, step-by-step guide on constructing a large, durable built-in bookcase from mahogany plywood and solid mahogany. The primary focus is on engineering reinforced shelving that can support heavy loads, such as law books, over a wide span without sagging or requiring unsightly central dividers. The process involves laminating plywood layers, cutting dados, assembling the carcass, attaching a face frame with pocket holes, and applying a custom stain and clear coat finish.
Position the shelves within the frame according to your design. Apply wood glue to the edges where the shelves meet the frame and secure them with screws. If you are installing adjustable shelves, attach the shelf pins or hardware according to the manufacturer's instructions.
Design and construct open shelving or a bookcase unit to fit within the under-stair space, maximizing storage and aesthetic appeal.
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