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Required stair enclosures shall comply with the requirements of Section 15-8-140. All other vertical openings shall be enclosed by smoke-tight partitions having a standard fire resistance of one hour except that vertical openings may remain unprotected in two story high spaces in open plan schools if an approved automatic sprinkler system, as defined in Chapter 15-16 of this Code, is installed throughout the building.
(Prior code § 54-12)