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NYC Building Code

§ 909.7 — § 909.7

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What is NYC BC § 909.7?

Quick Answer

This section outlines the requirements for smoke migration control through fixed openings between smoke control zones using the airflow method. The design must comply with specified standards and consider the geometry of openings to prevent turbulent flow reversal. Applies to building owners implementing smoke control systems.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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909.7 Air flow design method.

BC § 909.7

Where approved by the commissioner, smoke migration through openings fixed in a permanently open position, which are located between smoke control zones by the use of the airflow method, shall be permitted. The design air flow shall be in accordance with this section. Air flow shall be directed to limit smoke migration from the fire zone. The geometry of openings shall be considered to prevent flow reversal from turbulent effects. Smoke control systems using the airflow method shall be designed in accordance with NFPA 92.

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