Note: This excerpt is only a portion of a larger, Referenced Standards document and out of context may not include all information needed for use. Also, it may not reflect the most current building code requirements. The Referenced Standard, in its entirety, may be available for purchase from the International Code Council at http://shop.iccsafe.org.
709.3 Fire-resistance rating.
A 1-hour fire-resistance rating is required for smoke barriers.
Exception: Smoke barriers constructed of minimum 0.10-inch thick (2.5 mm) steel in Group I-3 buildings.
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