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NYC Building Code

§ 717.6.2 — § 717.6.2

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What is NYC BC § 717.6.2?

Quick Answer

This section outlines the requirements for protecting ducts and air transfer openings that penetrate the ceiling membrane of fire-resistance-rated assemblies. It specifies the use of shaft enclosures or the installation of listed ceiling radiation dampers and firestopping. Applies to building owners and operators managing fire-resistance-rated constructions.

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

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717.6.2 Membrane penetrations.

BC § 717.6.2

Ducts and air transfer openings constructed of approved materials in accordance with the New York City Mechanical Code that penetrate the ceiling membrane of a fire-resistance-rated floor/ceiling assembly or roof/ceiling assembly shall be protected with one of the following: 1. A shaft enclosure in accordance with Section 713.

2.A listed ceiling radiation damper and firestopping is installed at the ceiling line where a duct penetrates the ceiling of a fire-resistance-rated floor/ceiling assembly or roof/ceiling assembly.

3.A listed ceiling radiation damper and firestopping is installed at the ceiling line where a diffuser with no duct attached penetrates the ceiling of a fire-resistance-rated floor/ceiling assembly or roof/ceiling assembly.

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