| The minimum inside
radius for circular stairs is double the distance of the tread width.
Example: If the stair tread width is 4 feet, then the inside radius
can't be less than 8 feet. From the center point of the circular stairs,
to the inside of the circular stairway (distance between two arrows in
illustration above) couldn't be less than 8 feet.
Attention: Don't forget to check with your local
building department to verify any building codes on this website. This
information could be incorrect or outdated. Building codes are updated
regularly and to some building departments have different
interpretations for certain building codes.
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| Acceptable Circular
Stair Design |
Circular Stair Design That
Doesn't Meet This Particular Building Code |
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