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Floating Corner Shelves[8/4 Wide · 2ft · 5-Pack]
One pack. One build. All 5 boards used. • Makes 10 corner shelves
Shop Black Walnut 8/4 Wide · 2ft Pack Shop All Speciesselect 2' Lengths / 6-8"
How it goes together
Black Walnut
Hard Maple
Cherry
White Oak
Red Oak
Ash
Hickory
Ambrosia Maple
Sapele*
Padauk*
Purpleheart*
*Exotic — not available for shipment to US customers.
Thick triangular hardwood shelves that tuck into an inside corner with no brackets showing. Each board cuts into two pieces that glue up into a square, and each square cuts corner to corner into two shelves. One pack makes ten — five pairs. Hang a stack of three in a bare corner, put a pair in the bathroom, and gift the rest.
Quick Build — for experienced woodworkers
| Part | Qty | From | S2S size |
|---|---|---|---|
| Shelf pieces | 10 | Boards 1–5, two each | 11" × 5½" × 1¾" |
| Glued squares | 5 | Two pieces each | 11" × 11" × 1¾" |
| Triangle shelves | 10 | Each square cut corner to corner | about 10¾" legs, 15 3/16" front |
| Steel shelf pins | 20 | Hardware, 2 per shelf | ¼" × 4" |
Squares: two 11" pieces from each board, edge-glued → 11" × 11" × 1¾" (about 10¾" square after jointing).
Shelves: each square cut corner to corner → two right-triangle shelves. The cut crosses the glue line — the glue joint stays long grain to long grain.
Hanging: two ¼" × 4" steel pins in parallel holes in one back edge, 2" into the shelf and 2" into the corner stud, plus one optional #8 × 2½" screw angled into the other wall through a plugged counterbore.
Finished size: Each shelf about 10¾" along each wall × 1¾" thick, with a front edge about 15¼" long. Rated about 8 lb per shelf. Each weighs about 2½–3 lb.
Before You Start
Shopping List
- 1 lumber pack — 8/4 Wide · 2ft (6–8" wide, S2S)
- Wood glue (Titebond II or III)
- 20 × ¼" × 4" steel shelf pins or cut lengths of ¼" steel rod (2 per shelf)
- 10 × #8 × 2½" flat-head wood screws and ⅜" plugs (optional lock screw)
- Sandpaper 120 / 180 / 220
- Finish: wipe-on oil or hardwax oil
Tools
- Saw for crosscuts (mitre saw or circular saw with a speed square)
- Track saw, circular saw + straightedge, or bandsaw
- 4 bar clamps, 12" or longer
- Cauls (straight scrap strips)
- Drill press or doweling jig, ¼" brad-point bit
- Drill/driver, countersink bit, pilot bits, ⅜" counterbore
- Stud finder, 2ft level
- Random-orbit sander or sanding block
- S2S only: jointer, straight-line rip jig or hand plane
Why S2S only? The 6–8" wide 8/4 boards come S2S: both faces planed, edges rough. Plan on losing about ¼" per edge when you straighten them.
Our sizing assumptions: ⅛" per saw cut · 6–8" wide 8/4 S2S boards trimmed ½" each end and ¼" off each rough edge (5½" clean at the narrowest), planned at 1¾" thick · sizes drawn for the narrowest board in the pack. Wider boards give you a bigger offcut or a wider part — never a shortage.
Step-by-Step
S2S Lumber Pack (6–8" wide)
Surfaced 2 sides — straighten edges first
- 1 Prep the boards. Trim ½" off each end to remove any end checks. Joint one edge straight, then rip the other edge parallel (¼" off each rough edge is our planning allowance).
- 2 Cut the parts. Square one end of each board and cut it into two 11" pieces. Keep each pair together and mark them so the grain lines up across the seam.
- 3 Glue up five squares. Joint the mating edges and edge-glue each pair, long grain to long grain, into a 11" × 11" panel. Use cauls to keep the faces level. Clamp and leave overnight.
- 4 Flatten and square. Scrape off the glue and flatten both faces with a planer, belt sander or hand plane. Jointing takes about ¼" off the width, so trim the length to match: each panel must be a true square. Check that the two diagonals measure the same.
- 5 Cut the triangles. Draw a line corner to corner on each square. Cut just outside it with a track saw, a circular saw run against a clamped straightedge, or a bandsaw, then plane or sand to the line. The cut crosses the glue line, which is fine. You get two shelves with 11" legs from each square.
- 6 Shape the front. The long cut edge is the front. Round it over or chamfer it about ¼". Snip ½" off the two sharp front tips and soften them. Sand 120 → 180 → 220.
- 7 Drill the pin holes. Pick one of the square edges to be the back. Mark two holes on it, 1" and 2½" from the right-angle corner, centred on the thickness (⅞" down). Drill ¼" holes 2" deep, square to the edge — a drill press or a doweling jig keeps them straight. All the holes must be parallel.
- 8 Finish every face. Wipe on 2–3 coats of oil or hardwax oil on the top, bottom and edges so the shelves stay flat.
- 9 Find the framing. Most inside corners have studs right at the corner. Check with a stud finder or a thin nail where the pins will go — you need wood behind the drywall within about 3" of the corner. Draw a level line for the bottom of each shelf, and keep them 12"–14" apart.
- 10 Hang the shelves. Hold a shelf on its line, tight into the corner, and mark the pin holes through onto the wall (a dowel centre helps). Drill ¼" holes 2" deep into the stud, tap the pins in so 2" stick out, and slide the shelf on. To lock it, drive one #8 × 2½" screw at an angle through a counterbore in the top into the other wall's corner stud, and plug the hole.
Why do all the pins go into one wall? A shelf can only slide onto pins that point the same way. Pins in both walls would point at each other at 90°, and the shelf could never go on. Two pins in one wall carry the load; the angled screw into the other wall just stops the shelf from lifting off.
Why pins near the corner? That is where the studs are. Inside corners are framed with a stud or two right at the corner, so pins within about 3" of it land in solid wood.
Why glue up first and cut after? Cutting a big square in half gives two shelves that match exactly, with the glue line running the same way in both.
Why pre-drill? Maple, oak and hickory split if you drive a screw without a pilot hole. Pre-drill every screw and countersink so the heads sit flush.
Make It Yours
- Rounded front: draw an arc from tip to tip instead of a straight front for a quarter-round shelf.
- Bathroom pair: use a hardwax oil made for wet rooms and hang two above a tub corner for bottles and soap.
- Stepped stack: hang three or four in one corner, 12"–14" apart, for plants that trail down.
Safety and Care
- Wear eye and hearing protection. Use a push stick for every rip under 4" wide.
- Pre-drill every screw — hardwoods split without a pilot hole.
- Mount into wall studs (or rated anchors sized for the load). Check for wires and pipes before drilling.
- Each shelf is rated about 8 lb — plants, a small speaker, a few books. Keep the weight near the corner. Don't hang on it or lean on it.
- Clamp the square down for the diagonal cut. Never cut a triangle freehand on a table saw.
- Wear a dust mask when cutting and sanding, especially exotics (padauk, purpleheart, sapele).
Frequently Asked Questions
The 6–8" wide 8/4 pack comes S2S (faces planed, edges rough). Straighten the edges with a jointer, a table saw and a straight-line jig, a track saw, or a hand plane.
Use the bracket method: two small black steel L-brackets under each shelf, one on each wall, screwed to the wall with rated hollow-wall anchors and up into the shelf with short screws in pilot holes. Keep the load to about 5 lb.
Yes. Screw a 1" strip of offcut to each wall along the shelf line, into the corner studs, and set the shelf on top. It's easy and strong, but you can see the cleats from below.
About 8 lb with both pins in the corner stud — a potted plant, a small speaker or a stack of paperbacks. Keep heavy things close to the corner.
Planned offcuts only: about ¾" off the end of each board, plus the trimming when you square up each panel. All 5 boards go into the shelves.
Yes. A 4ft wide pack makes twenty shelves: crosscut every board in half first, then follow this plan twice.
