| The minimum spiral
stairway headroom clearance is 6 feet and 6 inches.
However, the
Minimum
Headroom Stair Clearance for almost every
other stairway is going to be 6 feet and 8 inches. Don't get these two
measurements confused.
The headroom clearance is going to be measured from the tip of the stair
nosing on the stair tread to the closest vertical distance, directly
above.
Special Tip: If you're designing a set of spiral stairs, make sure that
you allow for a minimum of 6'6" in headroom, otherwise you could find
yourself working on the demolition crew, as the building inspector makes
you tare the stairway part and rebuild it correctly.
Spiral Stairway
Spiral
Stairway Tread Minimum
Spiral
Stairway Access Areas
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