Summer Woodworking Project: Build a Folding Beach Chair from Lumber

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A folding beach chair is a useful summer build, but it is not just a pair of boards joined with a bolt. The seat and back have to fold without pinching, the hinges need to stay aligned, and the wood must tolerate wet towels, sand, and repeated movement. This plan uses two ladder-shaped frames joined with bolts and webbing for the seat. It suits a careful beginner with a drill, saw, and square.

Design and dimensions

The chair below is about 21 inches wide, with a seat roughly 15 inches off the ground and a back that reclines about 20 degrees from vertical. Those dimensions fit many adults, but check the proportions against the person who will use it. A wider seat needs longer crosspieces and a wider webbing layout; it also adds weight.

Use straight, dry, exterior-suitable lumber. Cedar is light and naturally weather-resistant, but it dents more readily than pine. Pressure-treated lumber is durable and inexpensive, though it can be heavy and may feel rough against skin unless you sand it well. Avoid boards with large knots or splits near bolt holes. For this project, buy four straight 1-by-2-inch boards, each 8 feet long, plus one 1-by-3-inch board for the front seat rail and top back rail.

Materials and tools

You will need 1/4-inch stainless-steel or galvanized bolts, washers, and locknuts; exterior-rated wood glue; exterior finish; and about 18 to 22 feet of 2-inch-wide outdoor webbing. Stainless hardware costs more, but it is the better choice near salt water. Galvanized hardware is a reasonable lower-cost option inland; avoid plain steel, which can rust and stain the wood.

A handsaw or circular saw, drill with a 1/4-inch bit, tape measure, square, clamps, and sanding block are enough. A 2-inch outdoor polyester webbing is a practical seat material: it dries quickly and is less prone to stretching than many inexpensive polypropylene straps. Check the listing for UV resistance and a stated load rating.

Cut list

These lengths assume the crosspieces fit between the side rails. If you want a full 21-inch outside width, make crosspieces about 18 inches long instead, then add the two side-rail widths. Pick one approach before cutting and keep both frames the same width.

Build the two frames

Make the front frame from the front legs, one seat crosspiece, and the front seat rail. Make the back frame from the rear legs and two back crosspieces. Position the lower crosspiece about 3 inches above the ends of the rear legs and the upper one near the top, leaving room for the back webbing. On the front frame, set the narrow crosspiece at the rear of the seat and the 1-by-3 rail at the front edge.

Predrill screw holes to avoid splitting the 1-by-2 rails. Apply a thin coat of exterior glue at each joint, clamp the parts square, then fasten with exterior screws. Glue helps, but the screws and bolts carry the load. Measure both diagonals of each frame; if they differ by more than 1/8 inch, shift the frame square before the glue sets. Sand all edges, especially the front seat rail, so they will not abrade the webbing.

Join and test the frames

Lay the frames across each other in the open-chair position. Put the front legs outside the rear legs, and mark a pivot point on each side about 14 inches up from the bottom of the front legs. Match the mark on the rear legs so the chair opens evenly. Drill 1/4-inch holes through each pair of rails, using a clamp to prevent the bit wandering. Fit a washer on each side and tighten a locknut until the joint is secure but still pivots freely.

Test the movement before fitting the seat. The frames should fold flat without catching and open to a stable position with all four feet on the floor. If they swing too far or feel wobbly, add a stop block or a short length of webbing between the frames to limit opening. Do not rely on a loose bolt to hold the chair open; a pivot that slips under load can collapse suddenly.

Install the webbing

Cut the webbing into lengths that span the chair width plus about 3 inches for wrapping and fastening. Start at the back rail, wrap each strip around the rail, and secure it with two stainless staples or short screws and washers. Continue down the back, then across the seat from rear to front. Space straps about 1 inch apart and pull them snug, not drum-tight. Webbing that is too tight can bow the side rails; webbing that is loose will sag and make the chair uncomfortable.

Overlap the seat and back at the corner so there is no gap that can catch clothing or skin. For a neater, repairable alternative, use outdoor chair-webbing clips if they suit your rail thickness. Clips cost more than staples and may be harder to find locally, but they make replacing worn straps simpler. Use corrosion-resistant fasteners either way.

Finish and safety check

Round sharp corners with 120-grit sandpaper and apply two thin coats of an exterior oil or water-based outdoor finish, following the label’s drying times. A clear finish needs periodic renewal; paint offers better UV coverage but can chip at moving joints. Keep finish off the webbing unless its manufacturer says it is compatible.

Before taking the chair to the beach, load-test it on level ground: sit down gradually, shift your weight, and check for creaks, loose nuts, cracked rails, or staples pulling free. Do not test it on soft sand first, where uneven support can hide a weak joint. Retighten hardware after the first few uses, rinse off salt and sand, and store the chair dry. If a rail splits at a pivot hole, replace it rather than patching the split and continuing to use the chair.