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909.20.5 Stair Pressurization Alternative
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Where the building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1, the vestibule is not required, provided that interior exit stairways are pressurized to a minimum of 0.10 inches of water (25 Pa) and a maximum of 0.35 inches of water (87 Pa) in the shaft relative to the building measured with all stairway doors closed under maximum anticipated conditions of stack effect and wind effect.
Related Code Sections
909.20.5 Fire Protection Systems, Stair Pressurization Alternative
, provided that interior exit stairways are pressurized to a minimum of 0.10 inches of water (25 Pa) and a maximum of 0.35 inches of water (87 Pa ...
Building Code 2012 of South Holland, IL > 9 Fire Protection Systems > 909 Smoke Control Systems > 909.20 Smokeproof Enclosures > 909.20.5 Stair Pressurization Alternative
1022.10.2 Means of Egress, Enclosure Access
is not required by way of a vestibule or exterior balcony for stairways using the pressurization alternative complying with Section 909.20.5.
...
Building Code 2012 of South Holland, IL > 10 Means of Egress > 1022 Interior Exit Stairways and Ramps > 1022.10 Smokeproof Enclosures and Pressurized Stairways and Ramps > 1022.10.2 Enclosure Access
1022.10.2 Means of Egress, Enclosure Access
is not required by way of a vestibule or exterior balcony for stairways using the pressurization alternative complying with Section 909.20.5 ...
Fire Code 2012 of South Holland, IL > 10 Means of Egress > 1022 Interior Exit Stairways and Ramps > 1022.10 Smokeproof Enclosures and Pressurized Stairways and Ramps > 1022.10.2 Enclosure Access
1205.11 Historic Buildings, Stairs and Railings
Existing stairways shall comply with the requirements of these provisions. The code official shall grant alternatives for stairways and railings ...
Existing Building Code 2012 of South Holland, IL > 12 Historic Buildings > 1205 Change of Occupancy > 1205.11 Stairs and Railings
1009.13 Means of Egress, Alternating Tread Devices
Alternating tread devices are limited to an element of a means of egress in buildings of Groups F, H and S from a mezzanine not more than 250 ...
Building Code 2012 of South Holland, IL > 10 Means of Egress > 1009 Stairways > 1009.13 Alternating Tread Devices