What's inside
As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links at no extra cost to you.
Contents
A Lounge Chair Built Around Two Curved Rails
This lounge chair uses two laminated wooden side rails to support the seat, back, and armrests. The rails are the difficult part, but they are also what gives the chair its light, continuous shape. Instead of bending one thick board, you glue several thin strips around a form. Once the glue cures, the laminated rail holds its curve with much less spring-back.
The project suits an intermediate woodworker with a table saw, router, clamps, and enough room to build a bending jig. Plan on a weekend for cutting and assembly, plus overnight glue-curing time. The finished chair is roughly 25 inches wide, 32 inches deep, and 34 inches high, depending on your rail curve and cushion thickness.
Materials and Tools
Use straight-grained hardwood for the rails and load-bearing parts. Ash, white oak, beech, and hard maple all work. Ash is usually the easiest to bend and often costs less than walnut. Avoid short pieces with knots in the rail laminations; a knot can split when the chair is loaded.
- Two hardwood side blanks, approximately 1 x 4 x 38 inches, for the rail laminations
- Additional hardwood for seat slats, back slats, stretchers, and arm caps
- Water-resistant PVA glue or a suitable epoxy
- Wood screws, plugs, and optional threaded inserts
- Four or five heavy-duty clamps per side rail
- A table saw, bandsaw or jigsaw, router, drill, and random-orbit sander
- A straightedge, square, flexible curve, and moisture-resistant plywood for the bending forms
For glue-up, a set of parallel bar clamps is convenient, but ordinary pipe clamps are fine if you add cauls. The cheaper option works as long as the pressure is distributed and the clamps do not twist the strips.
Design and Dimensions
Draw one full-size side profile before cutting any wood. Mark the floor, seat, back, and arm positions on the drawing. A comfortable starting point is a seat height of 15 to 16 inches, a seat depth of 19 to 21 inches, and a back angle of 105 to 110 degrees from the seat. Allow at least 2 inches of rail material beyond each joint so screws do not break out at the ends.
Make each finished rail about 1-1/4 inches thick and 2-1/2 to 3 inches wide. Resaw or rip six strips approximately 1/4 inch thick for two rails, allowing one extra strip in case of a defect. Thin strips bend more easily, but they require more glue-up time and create more glue lines. Strips thicker than 5/16 inch need a larger bending radius and more clamping force.
| Rail material | Advantages | Drawbacks | Best use |
|---|---|---|---|
| Ash | Flexible, tough, affordable | Open grain needs careful finishing | First laminated rail project |
| White oak | Strong, durable, attractive | Heavier and often pricier | Hard-wearing chair |
| Beech | Fine grain and smooth surface | Can move with humidity | Painted or indoor chair |
| Walnut | Excellent appearance | Expensive; waste is costly | Feature-quality furniture |
Make the Bending Form
Transfer the side profile to a sheet of 3/4-inch plywood. Cut two identical forms and screw them to a plywood base with the curved edges facing inward. Space the forms slightly wider than the finished rail so the laminations can be clamped between them. Add a straight fence along the bottom edge to keep the strips aligned.
Cover the form with packing tape or polyethylene sheet so squeeze-out does not glue the chair to the jig. Make several cauls from plywood or hardwood. The cauls should reach across all laminations and have edges shaped to match the form. A small gap between caul and rail will leave a flat spot or open glue line.
Glue Up the Curved Rails
Dry-fit every strip in the form before applying glue. Number the strips and mark their outside faces. Spread a consistent film of glue on every mating face; a notched spreader or small foam roller is more reliable than brushing on random amounts.
Stack the strips, place them in the form, and tighten clamps from the center of the curve toward both ends. Use firm pressure, not maximum pressure. Excessive force can squeeze out too much glue and cause a dry joint. Check that the strips remain fully seated against the form and that no strip has slid lengthwise.
Use the adhesive’s stated clamp time, then leave the assembly in the form for at least 12 hours. Do not rush this step because the rail may relax or creep while the glue is still green. If a glue line opens after removal, discard the rail rather than trying to hide the defect with finish.
A water-resistant wood glue is sufficient for a dry indoor room. Epoxy is useful when joints are slightly imperfect, but it costs more, requires careful mixing, and is harder to sand. Neither adhesive makes up for poorly fitting strips.
Shape and Assemble the Chair
Remove the rails and compare them. Trim both to matching length using a crosscut sled or a clamped straightedge. Mark the seat, back, and stretcher locations directly on both rails so the frame stays symmetrical. A simple plywood template helps transfer the holes without measuring each side repeatedly.
Drill oversized clearance holes through the rails and smaller pilot holes into the seat supports. Use screws with plugs, or install threaded inserts if you expect to disassemble the chair. Do not drive screws too close to a rail edge; keep their centers at least 3/4 inch from an edge in a 2-1/2-inch-wide rail.
Install the front and rear seat supports first, then add the seat slats with 1/4-inch gaps. The slats should project no more than 1/8 inch beyond the rails and have eased edges. Add the back slats at the angle shown on your drawing. A lower back stretcher prevents the rails from spreading, while a front stretcher improves rigidity and gives the chair a finished appearance.
Before tightening every fastener, place the chair on a flat floor and measure diagonally between opposite corners. Adjust until the two measurements are within 1/8 inch. If the frame rocks, find the high corner and correct it before adding the arms.
Arms, Finish, and Final Checks
Make the arm caps from straight stock about 3/4 inch thick and 2-1/2 to 3 inches wide. Screw them from below so the top remains clean. Ease every exposed edge with a 1/8-inch round-over bit or sandpaper. Sharp edges become uncomfortable quickly, especially on the front of the arms.
Sand to 150 or 180 grit. Do not polish the seat surfaces excessively; a very smooth surface can make cushions slide. Apply two or three thin coats of a furniture oil, wiping varnish, or water-based polyurethane. Lightly sand between coats according to the finish instructions. For a covered porch, choose an exterior-rated finish and expect periodic maintenance; this design is not automatically outdoor furniture.
Fit the cushion only after the frame is finished. A 2- to 3-inch seat cushion and a 3-inch back cushion usually provide better comfort than making the wooden back too reclined. If you need replacement foam or upholstery fabric, compare custom-cut upholstery foam with ready-made cushions. Ready-made foam is cheaper when its dimensions fit; custom foam is worth paying for when the chair has an unusual seat shape.
Finally, sit in the chair gradually and inspect every joint for movement or cracking. Rock the chair from side to side, check that all feet contact the floor, and retighten fasteners after the first week. A sound laminated rail should show continuous glue lines and no open cracks at the ends.