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In open plan schools, individual open plan floor areas shall be limited to an area not exceeding 30,000 square feet and a maximum linear dimension of 300 feet, unless an approved automatic sprinkler system, as defined in Chapter 15-16 of this Code, is installed throughout the building. Separation of individual open plan areas shall be achieved by the provision of smoke- stop barriers constructed of noncombustible materials having fire resistant properties not less than that of one- fourth inch thick wired glass installed in steel sash and frames. Doors provided therein shall be not less fire resistant than the barriers on which they are installed, shall close the opening completely with only such clearance as is necessary for proper operation, and shall be equipped with approved self-closing devices. Whenever such doors must be maintained open, approved electro-magnetic hold open devices shall be provided, arranged to close the doors automatically when activated by the building's fire alarm system or by specially installed approved smoke detectors located above such door openings.
(Prior code § 54-11)