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NYC Building Code

§ 909.4.1 — § 909.4.1

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What is NYC BC § 909.4.1?

Quick Answer

This section outlines the requirements for designing a system to account for the maximum probable normal or reverse stack effect. Factors such as altitude, elevation, weather history, and interior temperatures must be considered to ensure the system's capabilities are not adversely affected. Applies to building owners responsible for system design.

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

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909.4.1 Stack effect.

BC § 909.4.1

The system shall be designed such that the maximum probable normal or reverse stack effect will not adversely interfere with the system's capabilities. In determining the maximum probable stack effect, altitude, elevation, weather history and interior temperatures shall be used.

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