At 5.2m high and 1.7m wide, the Curtain Door is comprised of 40 sections of 254mm-thick Burma teak and sits between a entrance’s concrete walls. Each section has been carved to incorporate 160 pulleys, 80 ball bearings, one wire rope, and a hidden counterweight. Stacked one above the other in the closed position, each plank can then rotate by a simple push causing the door to reconfigure into a sinusoidal curve.

Breathtaking design by Matharoo Associates (Link).

Architects Matharoo Associates
Location Surat, India
Type of project Residentual Doorway
Project architects Gurjit Singh Matharoo, MC Gajjar, Chandan Suravarapu, Dilip Revar, Harita Salvi
Door contractors DP Traders
Link: More about Gurjeet Singh Matharoo and his Works