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Fire pit seating has a math problem: you need a lot of it, and store-bought outdoor chairs times eight is not happening. This design solves it with quantity-friendly materials — two 2x4s, two cedar fence pickets, and a stub of 2x2 per chair — and a geometry that's more relaxed than a dining chair but easier to build than an Adirondack.
The angles are the whole build. The base sides are cut at 10° so the seat tips back; the front legs are beveled at 5° so they sit flat under that tipped base; the back legs carry a 5° bevel at the floor and a 25° bevel at the top where the backrest lands. None of these cuts is hard, but the back legs will test your patience if you cut them one chair at a time.
Which is why the batch tip from the source build is the real gold in this plan: don't cycle the saw between angles per chair. Cut ALL the back legs long with both ends at 5°, then reset the saw once to 25° and come back through the whole stack. The cutting is fast — it's the saw adjustments that eat the afternoon. If you're building eight, batch every cut this way.
Use red-toned or pressure-treated 2x4s for the frame (it lives at ground level, in the weather) and finish with a solid-color penetrating fence stain — it soaks into rough picket faces far better than paint and never peels.
| Item | Qty |
|---|---|
| Cedar fence picket, 5-1/2" x 72", not dog-earedSeat and back slats. Quantities are per chair — multiply by the batch. | 2 each |
| 2x4, 8 ftRed-toned or pressure-treated — the frame sits in the weather at ground level. | 2 each |
| 2x2, 2 ftBackrest rail. One 8-footer covers four chairs. | 1 each |
| Exterior screws, 2-1/2", self-tappingFrame joints. | 25 each |
| Exterior screws, 1-1/4", self-tappingSlats. | 30 each |
| Exterior wood glue | 2 oz |
| Solid-color penetrating stainFence-rated. About a pint per chair; buy a gallon for a batch of eight. | 1 pint |
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 |
|---|---|---|
| Base front and back2x4 | 2 | 1 1/2" × 3 1/2" × 20 3/4" |
| Base sides2x4One end cut at 10° off square (angle, not bevel), long point measurement — this tips the seat back. | 2 | 1 1/2" × 3 1/2" × 24 1/4" |
| Front legs2x4One end beveled 5°, long point measurement. | 2 | 1 1/2" × 3 1/2" × 13 3/4" |
| Back legs2x45° bevel at the bottom, 25° bevel at the top, long point to short point. Batch-cut: all legs at 5° first, then one saw change to 25°. | 2 | 1 1/2" × 3 1/2" × 22 1/2" |
| Backrest rail2x2 | 1 | 1 1/2" × 1 1/2" × 23 3/4" |
| Seat slatsCedar fence picketCut all three from the same picket so color and width match. | 3 | 5/8" × 5 1/2" × 23 3/4" |
| Back slatsCedar fence picketSame-board rule again. | 4 | 5/8" × 5 1/2" × 17 3/4" |
Buy 5 boards at 8 ft.
2 boards
1 board
2 boards
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 →
Lay out the base rectangle — front, back, and the two 10°-angled sides — with both angled sides oriented the same way, long point down. Screw together with the 2-1/2" screws, two per joint.
That 10° is the recline of the finished chair. If one side goes in flipped, the base twists and nothing after this step fits.
Flip the base upside down — it's much easier to register the legs that way — and attach each front leg with three 2-1/2" screws and glue, matching the leg's 5° bevel orientation to the base so the foot will sit flat on the ground.
Glue matters on these joints: legs on outdoor chairs work loose from racking long before the wood fails.
The back legs carry the fussiest cuts in the build: 5° bevel at the floor, 25° bevel at the top, long point to short point. Batch them — cut every leg at 5° both ends first (23-1/2", ends parallel), then change the saw once to 25° and recut the tops of the whole stack.
Attach with two screws per joint. The 25° tops are what the backrest rail lands on.
The 2x2 rail attaches across the back leg tops at the recline angle, which makes it an awkward screw. Pre-drill everything — a 2x2 driven at an angle without a pilot hole splits, full stop. Pocket screws driven from the inside faces are a clean alternative; the seat slats cover them later.
Attach the front and back seat slats first with the 1-1/4" screws, then center the middle slat with even gaps.
Gaps aren't cosmetic on outdoor seating — rain has to drain through or the slats cup and rot. Cut all three slats from the same picket so the seat reads as one surface.
Set the two outer back slats first, screwed into the backrest rail and the rear seat slat, then space the middle slats evenly and attach.
Sand every edge — pickets throw splinters until you do — and finish with the penetrating stain. Then build the next seven; the second chair goes twice as fast, and by the fourth you'll have the angles memorized.
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