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This is the connector piece that lets two twin storage beds meet in a corner: two small bookcases joined by a bevel-cut cleat system, capped with an angle-clipped MDF top and a face panel, so the corner reads as one built-in nook rather than two beds shoved together. It's a smart, modular solution for a shared kids' room.
The clever bit is the cleats. They're cut with a 45° bevel on one end and — importantly — mounted on opposite sides of the two bookcases, so when you push the cases into the corner the beveled ends meet and the face panel spans across them. The plan is explicit that the cleats are NOT fastened to the same side on both cases, so line the bookcases up the way they'll sit in the room before you commit the cleats, or the face won't land.
Because it installs in a corner and connects to two beds, several parts get finished separately and assembled in the room: paint the bookcases after the back goes on, finish the face and the top independently, then bring it all together. The top is a big 40-1/2" square of MDF with one corner clipped at an angle to fit the diagonal of the nook — cut that clip per the layout. Fasten the top to the tops of both bookcases and the 2x2 back supports on final assembly.
| Item | Qty |
|---|---|
| 1x2 board, 8 ft | 1 each |
| 1x12 board, 10 ftSides, shelves, tops of the two bookcases. | 2 each |
| 2x2 board, 8 ftBack supports and back leg. | 1 each |
| 1/4" plywood, 1 sheetBacks. | 1 each |
| 3/4" MDF, 1 sheetTop and face. | 1 each |
| Wood screws, 1-1/4" and 2" | 40 each |
| Finish nails, 1-1/4" | 40 each |
| Wood glue | 4 oz |
| Paint or finish | 16 oz |
Overall cost: $$. Lumber prices vary by region, species, and season, so we give a band rather than a figure we would only be pretending to know.
| Part | Qty | T × W × L |
|---|---|---|
| Sides and shelves1x12 | 8 | 3/4" × 11 1/4" × 24 1/2" |
| Tops1x12 | 2 | 3/4" × 11 1/4" × 26" |
| Backs1/4" plywood | 2 | 1/4" × 25 1/4" × 26" |
| Cleats1x2One end 45° bevel; mounted on opposite sides of the two cases. | 8 | 3/4" × 1 1/2" × 11" |
| Face3/4" MDF | 1 | 3/4" × 19 1/2" × 25 1/4" |
| Back supports2x2 | 2 | 1 1/2" × 1 1/2" × 27 1/4" |
| Back leg2x2 | 1 | 1 1/2" × 1 1/2" × 25 1/4" |
| Top3/4" MDFOne corner clipped at an angle to fit the nook diagonal. | 1 | 3/4" × 40 1/2" × 40 1/2" |
Buy 9 boards at 8 ft.
1 board
1 board
1 board
4 boards
1 board
1 board
Assumes 8 ft stock, a 1/8" saw kerf, and buying each part at its own width. Change the board size or kerf on the full board plan →
Build the two bookcase boxes from 1x12s. Screws (2") are stronger, but nails and glue are easier to hide and fine here since these get boxed in. Keep them square.
Fasten the 1/4" backs on with 1-1/4" nails and glue, fastening to the back shelf too. Finish the bookcases now — paint or stain them at this stage while they're easy to reach.
Fasten the 45°-beveled cleats to the insides of the bookcases with 1-1/4" nails and glue. Crucially, the cleats are NOT on the same side of both cases — line the bookcases up the way they'll sit in the corner first, so the beveled ends will meet.
Paint or finish the MDF face and the top piece independently — they go on during room assembly. Clip the angled corner off the 40-1/2" top per the layout so it fits the nook diagonal.
In the room, screw the face to the meeting cleats with 1-1/4" screws, add the 2x2 back supports and back leg, and fasten the top to the tops of both bookcases and the back supports. Level it and confirm it ties the two beds together cleanly.
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