DIY Photo Booth Arch Wall: Cut List and Build Plan
Updated November 2026 · 5 min read
A DIY photo booth arch wall is one 4 x 8 sheet of 3/4-inch plywood cut to 48 x 84 inches with a semicircular top, framed with 2x4s on edge, split down the center so it travels in two halves, and stood on bolt-on feet weighted with sandbags. For a 48-inch wide arch, the radius is 24 inches and the compass pivot sits 60 inches up from the bottom.
Plan on roughly $250 to $400 in materials, a weekend of building plus a week of paint cure, and about 120 lb assembled. Two people can set it up in 8 to 10 minutes.
What are the key dimensions?
| Element | Spec |
|---|---|
| Face | 3/4 in sanded plywood (or MDF), 48 x 84 in |
| Arch | Semicircle, 24 in radius, curve starting at 60 in |
| Frame | 2x4s on edge (3-1/2 in deep) plus a curved plywood backer behind the arch |
| Split | Ripped on the centerline into two halves, each 23-15/16 x 84 in |
| Seam | Three 3/8 in carriage bolts with wing nuts at 12, 42 and 72 in |
| Feet | Two bolt-on T-feet (12 in forward, 18 in behind) and a center rear outrigger |
| Weight | About 60 lb per half in plywood, 68 lb in MDF |
Plywood or MDF? MDF paints smoother but is heavier and swells when wet. For a piece that travels every weekend, choose plywood.
How do you work out the arch radius?
For a full semicircle, radius R = width / 2, so a 48-inch face gives R = 24 inches. The pivot sits on the vertical centerline at total height minus radius: 84 - 24 = 60 inches from the bottom. The curve meets the sides at 60 inches (the spring line) and peaks at 84.
Check the layout with one measurement. Twelve inches in from either edge, the curve should sit at 60 + the square root of (24^2 - 12^2) = 60 + 20.78, or about 80-3/4 inches. If your line passes through that point, the layout is right.
Want a flatter, modern top? Use the segmental arch formula, where c is the full width (the chord) and h is how far the curve rises above the straight sides:
R = (c^2 / 4 + h^2) / (2 x h)
With c = 48 and h = 12: R = (576 + 144) / 24 = 30 inches. The pivot sits 30 inches below the peak, at 54 inches from the bottom, and the sides run straight to 72 inches.
How do you draw and cut the curve accurately?
Use a rigid trammel stick, not string, which stretches and wanders. Drill a pivot hole near one end of a 1 x 30 inch strip of 1/4-inch hardboard and a pencil hole exactly 24 inches away, center to center, then label it "R = 24."
Cut with a jigsaw and a down-cut blade, 1/16 inch outside the line, then sand fair to the line. A plunge router on a trammel gives a cleaner edge in 3 or 4 passes; set the radius to the inside edge of the bit.
What materials do you need?
| Item | Qty | Approx. cost |
|---|---|---|
| 3/4 in sanded plywood, 4 x 8 (or MDF) | 1 | $65 to $95 |
| 3/4 in plywood project panel, 2 x 4 ft, for arch backers | 1 | $25 to $40 |
| 2x4 x 8 ft, kiln-dried and straight | 7 | $30 to $50 |
| Wood glue, 1-1/4 in and 2-1/2 in screws | 1 each | $25 to $36 |
| 3/8 in x 4 in carriage bolts, washers, wing nuts | 10 sets | $23 to $35 |
| Filler, sandpaper, shellac-based primer, satin enamel | $60 to $108 | |
| Felt pads | 1 pack | $5 to $8 |
| 25 lb sandbags | 3 | $30 to $90 |
| Moving blankets | 2 | $20 to $35 |
That is roughly $285 to $500 all in, or about $250 to $400 if you already own sandbags and blankets. Prices are typical US big-box ranges.
What are the key build steps?
- Crosscut the sheet to 84 inches, mark the centerline and the pivot at 60 inches, and draw the arch.
- Cut the arch, sand it fair, then rip the face on the centerline and mark the halves L and R.
- Cut two quarter-ring backers (outer radius 23-1/4 in, inner 19-3/4 in) to sit hidden behind the curve.
- Build each half face down: two stiles and three rails, squared until the diagonals match within 1/16 inch. Glue and screw the face on from the front every 8 inches, and add corner gussets.
- Clamp the halves back to back, check the curve flows across the seam, and drill the three seam bolts, always from the same side.
- Bolt on the T-feet and outrigger, bevel the toes, add felt pads.
- Prime, then roll 2 to 3 coats of satin enamel with the halves joined, and let it cure 7 days.
Choose satin over gloss: ring lights bounce off gloss as a hot white circle behind guests' heads.
How do you transport it and keep it standing?
With the feet off, each half is about 24 x 84 x 4-1/4 inches, so the pair fits a mid-size SUV with the seats folded, a minivan or a pickup bed. Wrap each half in a moving-blanket sleeve and keep the hardware in one labeled bin.
On site, the arch needs three 25 lb sandbags on the rear legs of its feet, which lifts its tipping safety factor to about 2.4 (see how to keep a backdrop from tipping). Painted wood suits most banquet halls, but convention centers may want a fire-retardant coating; see NFPA 701 requirements.
Questions operators ask
Can I build an arch wall without a router?
Yes. A jigsaw with a fine down-cut blade works well if you cut just outside the line and sand to it. Go slowly on the curve and let the blade do the work.
How much can I rent an arch wall for?
As an example benchmark, a painted satin arch rents for about $125 as an add-on and an arch with a silk floral swag for about $175. With $250 to $400 in materials, it typically pays for itself in 2 to 4 rentals.
Can one person set it up?
Each half is a two-person carry for most people, or one person with a hand truck. With two people and some practice, setup takes 8 to 10 minutes.
Can I use an arch wall outdoors?
Only with care. A solid wall catches wind like a sail, so double the indoor ballast and take it down when sustained wind passes 15 to 20 mph. Keep MDF versions indoors.