Torus Chair

Form Study

The Torus Chair is an ergonomic cardboard chair designed for a project partner with scoliosis and long laptop work sessions. Built from no more than five 4-by-8 sheets of cardboard without adhesives or fasteners, the chair uses a waffle structure to translate a reclined 135-degree seating posture into a full-scale object.

• Client-specific ergonomic target
• Long-duration laptop posture
• Cardboard-only construction challenge

Structure

The chair uses repeated cardboard profiles to create stiffness, thickness, and visual rhythm without hiding the construction.

• Measured human proportions
• Studied scoliosis-related comfort
• Built scale mannequins

Iterations

Multiple full-scale and partial models test how the torus form supports the body from different angles.

• Interlocking panel logic
• No adhesives or hardware
• Rhino and Grasshopper workflow

Use Testing

Photos with users show the chair as a functional seating object rather than only a sculptural model.

• Thumbnail sketches
• Small-scale chair models
• Refined profile and support zones

Final Object

The final chair presents cardboard as a warm structural material with a clear ergonomic posture.

• Full-scale cardboard build
• Clear seating posture
• Material-efficient structure