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909.5.3.1 Group I-2, I-2.1, R-2.1 , and Ambulatory Care Facilities
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In Group I-2, I-2.1, R-2.1, and ambulatory care facilities, where doors are installed across a corridor, the doors shall be automatic-closing by smoke detection in accordance with Section 7220.127.116.11. Vision panels consisting of fire-rated glazing in approved frames shall be provided in each cross-corridor swinging door and at each cross-corridor horizontal-sliding door in a smoke barrier.