711.4.1.2 Through-penetration firestop system.
Through penetrations shall be protected by an approved through-penetration firestop system installed and tested in accordance with ASTM E 814, with a minimum positive pressure differential of 0.01 inch (2.49 Pa) of water. The system shall have an F rating and a T rating of not less than 1 hour but not less than the required rating of the floor penetrated.
Exception: Floor penetrations contained and located within the cavity of a wall do not require a T rating.
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