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A porch swing is a bench with a trust problem: every joint in it hangs in the air with people on it. This design earns that trust the simple way — a rectangular 2x4 seat frame, back supports screwed to it, arms tied into both — with nothing exotic. Pocket holes are optional; the plan even includes the workaround if you don't have a jig (cut the back boards 3-1/2" longer and skip the top back rail).
The build is the easy half. The hanging is the half to be careful with: use rated eye bolts or a porch swing hanging kit — through-bolted to the swing frame, never lag-screwed into end grain — and hang it from ceiling joists or a beam, never from ceiling boards. Four hang points (both ends of seat and back rails) keep the swing from folding forward when someone sits on the front edge. A 4-foot swing with two adults is easily 400+ lbs of live, moving load; every component in the chain should be rated well past it.
Cedar or pre-finished pine both work. Whatever the species, finish it before hanging — a hung swing is a miserable thing to paint the underside of.
| Item | Qty |
|---|---|
| 2x4, 8 ftFrame, back supports, and arms. | 5 each |
| 1x6, 8 ftSeat and back slats. | 2 each |
| 1x6, 4 ft | 1 each |
| 1x4, 8 ft | 1 each |
| Exterior screws, #9 x 2-1/2", self-tappingFrame assembly — or 2-1/2" exterior pocket screws if using a jig. | 40 each |
| Exterior screws, #8 x 1-1/2", self-tappingSeat and back slats. | 40 each |
| Porch swing hanging kit or rated eye bolts and chainRated hardware, through-bolted. This line item is not the place to save eight dollars. | 1 each |
| Exterior finishFinish BEFORE hanging. | 1 quart |
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 |
|---|---|---|
| Seat frame, front and back rails | 2 | 1 1/2" × 3 1/2" × 48" |
| Seat frame ends and supports | 4 | 1 1/2" × 3 1/2" × 18" |
| Back supportsNo pocket hole jig? Cut these 3-1/2" longer (23-1/4") and omit the top back rail. | 4 | 1 1/2" × 3 1/2" × 19 3/4" |
| Top back rail | 1 | 1 1/2" × 3 1/2" × 48" |
| Front arm supports | 2 | 1 1/2" × 3 1/2" × 11 1/4" |
| Arms | 2 | 1 1/2" × 3 1/2" × 22 1/2" |
| Seat and back slats1x6 | 5 | 3/4" × 5 1/2" × 48" |
| Back slats, narrow1x4 | 2 | 3/4" × 3 1/2" × 48" |
Buy 12 boards at 8 ft.
5 boards
5 boards
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 →
Assemble the basic rectangle: front and back 48" rails with the 18" ends and two interior supports between them. Pocket screws if you have the jig, otherwise 2-1/2" screws through the rails into the crosspieces, pilot-drilled.
Everything on this swing hangs from this frame. Square it, and don't skimp a screw.
Screw the four back supports to the seat frame, then tie their tops together with the 48" top rail.
No jig? Use the plan's alternative: back supports cut 3-1/2" longer, no top rail — the back slats themselves tie the tops together instead.
Screw the two short arm supports vertically to the front corners of the seat frame — pilot-drill, these are near board ends.
Set each arm on its front support and screw it there and into the back support. Check the two arms are level with each other — on a swing your eye catches an arm mismatch instantly, because the horizon is right behind it.
Screw the 1x6 seat slats across the frame with the 1-1/2" screws, small even gaps for drainage. Round the front slat's edge generously — it's the one behind everyone's knees.
Attach the remaining 1x6s and the two 1x4s to the back supports, even gaps. The mixed widths give the back a subtle rhythm — lay them out and look before you screw.
Sand thoroughly and finish every face — including the underside, which is at eye level to everyone walking up your porch steps.
Hang with a rated kit or rated eye bolts: THROUGH-BOLT the hardware to the seat frame (front and back rail at each end, four points total), and fasten overhead only into joists or a structural beam. Test-load it with more weight than it will ever carry before a person swings on it. Chain angle slightly outward at the arms keeps it from twisting.
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