This stair, which I designed and built for my own apartment, tries to provide optimum slope within a very tight space. It is essentially a spiral stair whose central column has been “deformed” so that it fits and works within a rectangular stairwell.



Stair during construction, with only the stringers in place.



About Rafael Gomez-Moriana

Architect, educator and writer. Partner at ArqEstructura. Adjunct Associate Professor at the University of Calgary. Blogger at


  1. Nice. Can you give us some dimensions? How large is that tight space? (I would guess about 2m by 2m, and height of 3m?)What is the size of each step?

  2. The existing conditions were an opening in the upper floor of 2,20 x 0,72 m, and a floor-to-floor height of 2,87 m. The overall plan dimensions of the stair: the long segment of the “L” shape measures 2,20 m; the short one 1,27 m. The stair has 14 risers at 20,5 cm, while the average tread dimension is 23 cm.

  3. Looks GR8…and functional as well.

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