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[F] 907.4.3 Automatic Smoke Detection
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Where an automatic smoke detection system is required it shall utilize smoke detectors unless ambient conditions prohibit such an installation. In spaces where smoke detectors cannot be utilized due to ambient conditions, approved automatic heat detectors shall be permitted.
For conditions other than specific fire safety functions noted in Section 907.3, in areas where ambient conditions prohibit the installation of smoke detectors, an automatic sprinkler system installed in such areas in accordance with Section 903.3.1.1 or 903.3.1.2 and that is connected to the fire alarm system shall be approved as automatic heat detection.
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411.3 Special Detailed Requirements Based on Occupancy and Use, Automatic Smoke Detection
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Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 412 Aircraft-Related Occupancies > 412.2 Airport Traffic Control Towers > 412.2.3 Emergency Systems > 412.2.3.1 Automatic Smoke Detection Systems