// CODE SNIPPET
1011.10 Spiral Stairways
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Spiral stairways are permitted to be used as a component in the means of egress only within dwelling units or from a space not more than 250 square feet (23 m2) in area and serving not more than five occupants, or from technical production areas in accordance with Section 410.5.
A spiral stairway shall have a 63/4-inch (171 mm) minimum clear tread depth at a point 12 inches (305 mm) from the narrow edge. The risers shall be sufficient to provide a headroom of 78 inches (1981 mm) minimum, but riser height shall not be more than 91/2 inches (241 mm). The minimum stairway clear width at and below the handrail shall be 26 inches (660 mm).
Related Code Sections
1011.10 Means of Egress, Spiral Stairways
Spiral stairways are permitted to be used as a component in the means of egress only within dwelling units or from a space not more than 250 ...
408.3.4 Special Detailed Requirements Based on Occupancy and Use, Spiral Stairways
Spiral stairways that conform to the requirements of Section 1011.10 are permitted for access to and between staff locations ...
Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 408 Group I-3 > 408.3 Means of Egress > 408.3.4 Spiral Stairways
419.3.2 Special Detailed Requirements Based on Occupancy and Use, Spiral Stairways
Spiral stairways that conform to the requirements of Section 1011.10 shall be permitted ...
Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 419 Live/Work Units > 419.3 Means of Egress > 419.3.2 Spiral Stairways
410.5.3.4 Special Detailed Requirements Based on Occupancy and Use, Path of Egress Travel
The following exit access components are permitted where serving technical production areas : Stairways . Ramps . Spiral stairways ...
Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 410 Stages, Platforms and Technical Production Areas > 410.5 Means of Egress > 410.5.3 Technical Production Areas > 410.5.3.4 Path of Egress Travel
1011.11 Means of Egress, Handrails
, the handrail shall comply with Section 2407. Exceptions: Flights of stairways within dwelling units and flights of spiral stairways ...