Garden benches · Guide 43
Build a Compact 42-Inch Cedar Garden Bench
Build a 42-inch backless cedar bench with three 2 × 6 seat slats on a braced 4 × 4 leg frame, sized for a small patio and a 17.5-inch seat height.
01 / See the shape
View the project
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Scroll or swipe the enlarged drawing to read its dimensions. Choose Fit to see the whole drawing again.
Every joint and screw is checked by hand before the bench is considered for seating.
02 / Plan your build
Before you start
A short bench is easier to tip than a long one, because one person sitting near an end puts weight outside the legs. This design keeps the overhang small. The four 4 × 4 legs stand only 2 inches in from each slat end and 1 inch in from each long edge, so most of the seat sits over the leg footprint. Top rails tie the leg tops on all four sides. A center cleat supports the slats at mid-length. A low H-shaped stretcher braces the legs near the ground against racking. The bench fails if the pocket-screw joints are driven out of square or loosen and let the legs rack. It also fails if a seat screw is driven into a pocket bore or close enough to split a slat. It also fails if the 2-inch end overhang is lengthened, or if the bench stands on soft or sloping ground where one leg sinks.
Where it goes
A firm, level patio or paver area at least 42 × 17 in plus about 30 in clear on each long side. Do not place it on a slope, on soft soil, at a deck edge or within reach of a drop.
Footprint: 42 × 17 in seat with legs on a 38 × 15 in area. Allow about 30 in clear on each long side for sitting and access, about 42 × 77 in in total
What to expect
Make square cuts in 4 × 4 stock, drill clamped pocket holes and pilot seat screws. Plan 5–7 hours of work, plus the drying time on the finish label.
A planning estimate for the hands-on work, once the materials are bought and the tools are set up. It has not been timed on a finished build.
Check the spot
- A firm, level patio or paver area at least 42 × 17 in plus about 30 in clear on each long side; no slope, soft soil, deck edge or nearby drop.
- A flat work surface large enough to lay out a 42 in slat and clamp a 38 × 15 in frame without reaching across a moving cutter.
Stop and check first if…
- Stop if a part splits, a pocket screw strips or breaks out through a face, or the frame diagonals differ by more than 0.125 in. Open and remake the joint before going on.
- Do not lengthen the slats, move the legs inward or substitute a smaller section without reworking every cut length and screw location.
- Stop if the bench rocks on the chosen site or any leg sinks into the surface.
Work safely
- Support the 4 × 4 fully on both sides of the cut and clamp it; never hold a short leg offcut by hand beside the blade.
- Clamp each rail in the pocket-hole jig before drilling and keep fingers clear of the stepped bit.
- Follow the saw, drill and finish manufacturer instructions; keep guards in place and disconnect power before changing bits or blades.
- Lift the assembled bench with two people by R0 and R1. Lay oily finish rags flat outdoors to dry, or seal them in a water-filled metal can, before disposal.
Budget
We have not put a price on this one yet. Lumber and hardware prices change by store and season, so price the list under What you need at your local supplier before you buy.
03 / Gather and cut
What you need
L — Leg
4 pieces
Western red cedar or redwood 4 × 4; actual 3.5 × 3.5 in. One 4 × 4 × 8-ft board: 4 × 16 = 64 in, plus 1 in end trim and 4 kerfs at 0.125 = 65.5 in of 96 in. The extra length lets you cut around end checks.
Measure the actual section at both ends. Reject a leg with a through-check or loose knot. Cut all four from the same board so they match in length.
R — Side rail
2 pieces
Western red cedar or redwood 2 × 4; actual 1.5 × 3.5 in. From 2 × 4 board 1 (8 ft): R 31 + R 31 + E 8 + E 8 = 78 in, plus 1 in trim and 4 kerfs at 0.125 = 79.5 in of 96 in.
Choose the straightest 2 × 4 for R. Bow over 0.125 in along 31 in will show at the seat.
E — End top rail
2 pieces
Same 1.5 × 3.5 in cedar or redwood. From 2 × 4 board 1, after both R.
Both E must match within 0.0625 in or the end frames will differ in width.
C — Center cleat
1 piece
Same 1.5 × 3.5 in cedar or redwood. From 2 × 4 board 2: T 33 + C 12 + B 8 + B 8 = 61 in, plus 1 in trim and 4 kerfs at 0.125 = 62.5 in of 96 in.
Cut only after measuring the real distance between the R inner faces on the assembled frame; it should be 12 in.
B — End lower rail
2 pieces
Same 1.5 × 3.5 in cedar or redwood. From 2 × 4 board 2, after T and C.
Must match E in length so the legs stay parallel.
T — Lower stretcher
1 piece
Same 1.5 × 3.5 in cedar or redwood. First cut from 2 × 4 board 2.
Confirm 33 in against the measured gap between the B inner faces before cutting the last end.
S — Seat slat
3 pieces
Western red cedar or redwood 2 × 6; actual 1.5 × 5.5 in. Two 2 × 6 × 8-ft boards. Board 1: two S at 42 = 84 in, plus 1 in trim and 2 kerfs at 0.125 = 85.25 in of 96 in. Board 2: one S = 43.125 in of 96 in, leaving a spare for a replacement slat.
Reject slats with splits within 6 in of an end, cupping over 0.0625 in across the face, or a loose knot over a screw point.
Pocket-hole screws
32 items
2.5 in coarse-thread exterior pocket-hole screws, stainless steel or an exterior coating the screw maker lists as compatible with the chosen wood Buy one pack holding at least 32; keep spares separate from the installed count.
R 8, E 8, C 4, B 8, T 4. Set the jig for 1.5 in stock and follow its screw chart. No connection capacity is inferred.
Seat screws
14 items
#9 × 2.5 in exterior deck screws, stainless steel or an exterior coating the screw maker lists as compatible with the chosen wood Buy at least 14; keep spares separate from the installed count.
S0 4, S1 6, S2 4. A 2.5 in screw through the 1.5 in slat gives about 1 in into R, E or C. Pilot and countersink per the screw maker. No connection capacity is inferred.
Cut list
| Piece | How many | Cut length | Note |
|---|---|---|---|
| L — Leg | 4 | 16 × 3.5 × 3.5 in | Finished length × width × thickness; square ends unless the detail says otherwise. |
| R — Side rail | 2 | 31 × 3.5 × 1.5 in | Finished length × width × thickness; square ends unless the detail says otherwise. |
| E — End top rail | 2 | 8 × 3.5 × 1.5 in | Finished length × width × thickness; square ends unless the detail says otherwise. |
| C — Center cleat | 1 | 12 × 3.5 × 1.5 in | Finished length × width × thickness; square ends unless the detail says otherwise. |
| B — End lower rail | 2 | 8 × 3.5 × 1.5 in | Finished length × width × thickness; square ends unless the detail says otherwise. |
| T — Lower stretcher | 1 | 33 × 3.5 × 1.5 in | Finished length × width × thickness; square ends unless the detail says otherwise. |
| S — Seat slat | 3 | 42 × 5.5 × 1.5 in | Finished length × width × thickness; square ends unless the detail says otherwise. |
Tools
- Tape, combination square, straightedge, level and sharp pencil
- Guarded miter saw or circular saw able to cut 3.5 in deep, or a saw guide for two passes
- Pocket-hole jig and stepped bit set for 1.5 in stock
- Drill/driver, countersink and pilot bits matched to the seat screws
- At least four clamps, a flat bench and two 0.25 in spacers
- Sanding block or sander with 120-grit abrasive and a dust brush
Protective gear
- Eye protection during cutting, drilling and driving
- Hearing protection and dust collection or a dust mask suited to the actual tools and cedar dust
- Closed footwear; keep loose clothing and gloves away from rotating cutters
- Chemical-resistant gloves when applying finish, per its label
04 / Put it together
Build steps
- 01
Confirm the site and intended use
Choose a firm, level surface at least 42 × 17 in plus about 30 in clear on each long side. Lay a straightedge and level across the 38 × 15 in area where the four legs L will stand. Check both directions and both diagonals.
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The four leg positions show the ground area that must be firm and level.
Check: The surface is firm, the level bubble is centered both ways, and no edge or drop is within reach of the bench.
- 02
Inspect and measure the stock
Measure every board at both ends and the middle. The 4 × 4 must be 3.5 × 3.5 in, the 2 × 4 boards 1.5 × 3.5 in and the 2 × 6 boards 1.5 × 5.5 in. Reject boards with splits within 6 in of an end, twist, loose knots or more than 0.125 in bow.
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Loading the 3D view…
Drag to turn. Pinch or use + / − to zoom. The written step covers workholding and tool use.
Scroll or swipe the enlarged drawing to read its dimensions. Choose Fit to see the whole drawing again.
Compare each measured section with the three actual sizes used throughout the plan.
Check: All sections match the parts table, or work stops until the cut lengths are worked out again for the stock you have.
- 03
Cut the four legs
Clamp the 4 × 4 on full support on both sides of the cut. Square one end with a 1 in trim cut. Cut four legs L at 16 in each, measuring from the squared end every time. Ease the bottom edges of each L with a 0.25 in chamfer.
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Loading the 3D view…
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Four legs come from one 4 × 4 after a squaring cut.
Check: All four L match within 0.0625 in and every end is square to both faces.
- 04
Cut the rails and stretcher
Square one end of each 2 × 4. From board 1, cut R at 31, R at 31, E at 8 and E at 8 in. From board 2, cut T at 33, B at 8 and B at 8 in, and set aside 14 in for C. Label every part on its marked top edge.
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Two 2 × 4 boards yield the rails and stretcher; C is cut later to the measured gap.
Check: Both R match, all four E and B match within 0.0625 in, and T measures 33 in.
- 05
Cut and ease the seat slats
Square one end of each 2 × 6. Cut two slats S at 42 in from board 1 and one S at 42 in from board 2. Mark the best face of each as the seat face. Round over the seat-face edges and the cut ends 0.125 in with a sanding block.
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Three equal slats, each with its seat face marked and edges eased.
Check: Three S lie flat face to face, ends align within 0.0625 in and the seat faces have no splinters.
- 06
Drill the pocket holes
Set the pocket-hole jig and collar for 1.5 in stock per the jig instructions. On the inside face of each R, drill two holes at each end, 0.75 and 2.75 in below the top edge. On E, B and T, drill two at each end at 1.25 and 2.25 in. Leave C until step 9.
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R and E use different row heights so their screws stay apart inside each leg.
Check: Count 28 holes on R, E, B and T, all on inside faces, with no hole breaking out through an outside face or end.
- 07
Assemble the two end frames
Lay legs L0 and L2 on a flat bench, 8 in apart between inner faces. Clamp E0 between them, top flush to the leg tops and outer face flush to the leg end faces. Clamp B0 1 in in from the leg end faces, bottom edge 3 in above the leg bottoms. Drive 4 screws into each rail. Repeat with L1, L3, E1 and B1 for 16 screws in total.
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Each end frame sets the 8-inch leg gap and the lower rail height.
Check: Each end frame is 15 in wide outside, its two diagonals match within 0.0625 in and all rail edges sit flush.
- 08
Join the side rails and square the frame
With a helper, stand the end frames on the flat surface 31 in apart between inner leg faces. Clamp R0 and R1 between the legs, top edges flush to the leg tops and outer faces flush to the leg outer faces, pockets facing in. Drive 8 screws. Measure both top diagonals across the 38 × 15 in outside before removing the clamps.
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Side rails join the end frames; the top diagonals confirm the frame is square.
Check: Both top diagonals read 40.85 in and match within 0.125 in, and all four leg tops are flush with the rails.
- 09
Fit the center cleat and lower stretcher
Measure between the R inner faces and cut C at that length, 12 in. Drill two pocket holes at each C end, 1.75 and 2.75 in below the top edge, so the seat screws stay clear. Clamp C with its left face 18.25 in from the left leg outer faces, top flush with R. Drive 4 screws. Clamp T between B, 3.25 in from each B front end, bottom 3 in up. Drive 4 screws.
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The cleat supports mid-seat and the stretcher braces the legs near the ground.
Check: All four feet touch the flat surface, the frame does not rock, C sits flush with the R tops and 32 pocket screws are in.
- 10
Sand and finish the parts
Sand all exposed faces of the frame and the three S to 120 grit and remove dust. If you use an exterior finish, coat every face, including slat undersides, slat ends and the leg bottom end grain. Let it dry for the full time on the product label.
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The slats are shown lifted 8 inches only to expose their undersides and ends for finishing.
Check: The finish is dry to the label standard and no raw end grain remains on the leg bottoms or slat ends.
- 11
Fasten the seat slats
Lay S0, S1 and S2 on the frame with two 0.25 in spacers between them. Set each slat end 2 in past the leg outer faces and each outer edge 1 in past them. Mark 14 points, x from each slat left end. S0 and S2: two into R at x 9 and 33, 1.75 in from the outer edge, and two into C at x 21, 1 and 2.25 in from the inner edge. S1: two into each E at x 2.75 and 39.25 and two into C at x 21, 2 and 3.5 in from its front edge. Clamp each slat. Drill a countersunk clearance hole through the slat and a pilot into the part below, sized per the screw maker. Drive the screws.
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Scroll or swipe the enlarged drawing to read its dimensions. Choose Fit to see the whole drawing again.
Each slat has its own screw pattern, kept away from the pocket bores in R and C.
Check: The seat measures 42 × 17 in, both gaps are 0.25 in, and every screw head sits just below the seat face.
- 12
Place and check the bench
With two people, lift the bench by R0 and R1, not by a slat end, and set it on the checked site. Press down by hand on each corner of the seat in turn. Do not use loose wedges under a leg. Regrade or move the bench to firmer ground if it rocks.
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All four feet must bear on the checked surface without packing.
Check: All four legs bear on the surface with no rocking when each corner is pressed by hand.
- 13
Inspect before any use
Check all 46 screws for seated heads and no tips breaking a surface. Check every leg and rail joint for gaps and every slat end for splits. Run a hand over the seat face and edges. Push sideways on the seat by hand and watch the leg joints. Seated use, especially two adults or anyone sitting at one end, waits for the review named in the limits.
Close-up · Whole model shows the complete partLoading the 3D view…
Drag to turn. Pinch or use + / − to zoom. The written step covers workholding and tool use.
Scroll or swipe the enlarged drawing to read its dimensions. Choose Fit to see the whole drawing again.
Every joint and screw is checked by hand before the bench is considered for seating.
Check: No joint gap, split, protruding point, racking movement or rocking is found, and the review status is recorded.
05 / Keep it sound
Care
After the build
- Place the bench on the checked site with all four legs on firm ground and the 30 in clearances kept on both long sides.
- Do not use the bench as a seat until the review named in the limits has been recorded for this revision.
Check it each season
- Before each season, check all 46 screw heads, every rail joint and every slat end. Unload the bench before tightening. Replace a cracked part rather than adding a screw beside the crack.
- Brush off debris, keep leg bottoms out of standing water and renew the finish when bare wood shows, following its label.
If something looks wrong
- Bench rocks on one corner
- Move it to a level spot or regrade the surface; check that a leg has not loosened from its rails.
- Frame racks or a rail joint opens
- Stop using the bench. Unload it, reclamp the joint flush and square, then replace any stripped pocket screw or damaged part.
- Slat splits at a screw
- Remove the slat and cut a replacement at 42 in from the spare 2 × 6. Pilot and countersink before driving the screws.
- Seat screw will not seat or wanders near C or R
- Back it out; it may be hitting a pocket bore. Check the point against the listed x and edge distances and re-pilot at the correct location.
- Slat gaps close or open after weather
- Check for cupping; replace a slat that no longer bears on R, E or C along its full width.
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