Steam Bending Wood for Curved Chair Backs

Article 10: Steam Bending Wood for Curved Chair Backs

By: A Woodworker Who Finally Built That Rocker

Steam bending allows you to shape wood beyond the limits of sawing or laminating. Perfect for making chair backs, arms, or even sled runners.

Materials

MaterialDimensionsNotesAir-dried oak or ash1/4” to 3/4” thick, 36” longMust be straight grainWater-For steamingMold/Form3/4” plywoodShaped to desired curveScrews, clamps-For securing the form

Tools Needed

• Steam box or PVC pipe with kettle

• Heat source (wallpaper steamer or turkey fryer)

• Clamps

• Bending form (DIY with plywood)

• Timer, gloves

Steps

1. Build Your Form

   • Trace your curve onto plywood and cut with jigsaw.

   • Duplicate for a matching clamping side.

   • Add standoffs and handles.

2. Steam the Wood

   • 1 hour per inch of thickness (e.g., 45 min for 3/4”).

   • Keep wood sealed in box, use thermometer to maintain 200°F.

3. Bend Immediately

   • Remove and clamp quickly to the form.

   • Leave in form for 24+ hours to fully dry and set.

4. Trim & Integrate

   • Once set, trim to size and sand.

   • Integrate into chairs, sleds, or armrests.

Visual: Bending Setup

[Steam Box] → [Clamp to Form] → [Dry Overnight]

   _________
  /         \    ← Bent wood held by form
 /           \
 |           |