Intermediate · An afternoon, plus finishing · Last reviewed September 30, 2026

Floating shelf plans with hidden cleat

A hollow floating shelf: a 2x cleat and ribs are screwed to the wall studs, and a glued-up plywood sleeve slides over them. Set the length, depth and visible thickness; the frame, the sleeve parts and the screws are recalculated.

Drawing

5 parts · 12 pieces

Shelf: 36" × 8" × 3 1/2"
Frame inside: 2 3/8" tall, 6 ribs
Studs crossed: at least 2

Parts

hover or tap to find

Cut list

actual sizes

Cut list
Part	Name	Qty	Length	Width	Thick	Cut from	Notes
A	Wall cleat	1	34 3/4"	2 3/8"	1 1/2"	2x3 (1 1/2" × 2 1/2" actual)	rip to 2 3/8"
B	Rib	6	5 7/8"	2 3/8"	1 1/2"	2x3 (1 1/2" × 2 1/2" actual)	rip to 2 3/8"
C	Top and bottom skin	2	35"	7 1/2"	1/2"	1/2" plywood
D	Front	1	35"	3 1/2"	1/2"	1/2" plywood
E	End cap	2	8"	3 1/2"	1/2"	1/2" plywood

Shopping list

from the optimizers

1 ×

2x3 (1 1/2" × 2 1/2" actual), 8 ft

Parts A, B · 73% used · fewest possible

Open in cut-list optimizer

1 ×

1/2" plywood, 4 × 8 ft sheet

Parts C, D, E · 15% of the sheet area used

Open in sheet optimizer

Board feet bought: 4 BF nominal (1.7 BF in the finished parts, actual size). Every list allows a 1/8" saw kerf per cut and assumes defect-free stock; tally board feet or price the boards to compare lengths.

Hardware and tools

Hardware and fasteners
Qty	Item and use
6	1/4" × 4" structural wood screws Cleat into studs, 2 per stud (lengthen to 5" through 5/8" drywall)
12	#9 × 3" construction screws Through the cleat into each rib end
12	#8 × 1 1/4" wood screws Up through the bottom skin into the ribs, hidden
1 box	18 ga brad nails, 1 1/4" Sleeve assembly
1 bottle	Wood glue Sleeve joints

Tools

Table saw or circular saw with a rip guide
Drill/driver
Stud finder
Level
Brad nailer or clamps

Build steps

An afternoon, plus finishing

Rip 2x stock to 2 3/8" wide and cut the cleat at 34 3/4" and 6 ribs at 5 7/8". Cut the plywood skins, front and end caps.
Build the sleeve first: glue and brad-nail the top and bottom skins to the back of the front, then glue on the end caps. Check the inside is square and 2 1/2" tall all along; the frame has to slide in.
Finish the sleeve now (sand, stain or paint); it is much easier off the wall.
Find the studs and mark them. Lay out the ribs on the cleat at 0", 6 5/8", 13 5/16", 19 15/16", 26 5/8", 33 1/4" from one end, moving any that land on a stud mark over by an inch so the wall screws have room.
Screw the ribs to the cleat with two 3" screws through the back of the cleat into each rib end.
Hold the frame level on the wall and drive two structural screws through the cleat into every stud it crosses (at least two studs).
Slide the sleeve over the frame until it touches the wall, then fix it with screws up through the bottom skin into the ribs.

How a floating shelf holds up

All the load goes into the wall studs through the cleat. The ribs cantilever out of the cleat and the sleeve rests on them, so the shelf is only as strong as the screws into the studs and the joint between each rib and the cleat. That is why the plan insists on at least two studs, uses structural screws for the cleat and puts a rib every 8" or so.

The sleeve is a thin plywood box that hides the frame. It adds stiffness once screwed to the ribs, but it is not what carries the weight.

Where the plan stops being reliable

The plan gives no load rating, because the answer depends on the studs, the drywall, the screws and how the load is placed. Books at the front edge of a 10" deep shelf put far more twist on the screws than the same books against the wall. Keep deep shelves for light things.

Masonry, plaster-and-lath and metal studs need different fixings from the wood-stud screws listed here.

Safety

Wear eye and hearing protection, keep guards on saws, and support long boards and full sheets on both sides of the cut. Pre-drill near board ends so screws do not split the wood. The plan is a woodworking guide, not an engineered design: it has no load ratings, and it does not replace the instructions that come with your tools and fasteners.

About this plan

Designed for LCuts from standard practice for this kind of build; the dimensions, cut list and steps are computed from your inputs by code you can check on the methods page. The shopping list runs every part through the cut list optimizer (boards) and the sheet cut optimizer (plywood), with the same heuristics and lower bounds. Last reviewed September 30, 2026.

Common questions

How deep can a floating shelf be?

Most hidden-cleat shelves are 6 to 10 inches deep. Deeper is possible, but the twisting force on the wall screws rises with depth, so keep loads light and screw into every stud.

Can I hang a floating shelf without studs?

Not this design. A cleat held only by drywall anchors will sag and pull out. Make the shelf long enough to reach two studs, or use blocking behind the drywall.

What screws hold a floating shelf cleat?

Quarter-inch structural wood screws long enough to go through the cleat and drywall and at least 1 1/2 inches into the stud: 4 inches through 1/2-inch drywall, 5 inches through 5/8-inch. Two per stud.