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spiral stair

  1. M

    Spiral vs Curved vs Winder; "within individual dwelling unit"

    Hello all, long time listener first time caller. Posting this in commercial rather than residential because it's multifamily and I wanted answers from a more rigorous perspective. I'm working on a fairly compact proposal for a condominium development subject to California Building Code and I'm...
  2. V

    Spiral Stair Walkline Radius

    In R311.7.10.1 what does a maximum walkline radius of 24 1/2" mean or have to do with anything? Is it saying that at the 24 1/2" walkline radius the min tread depth is 6 3/4"?
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