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NYC Building Code

§ 711.2.3 — § 711.2.3

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What is NYC BC § 711.2.3?

Quick Answer

This section outlines the requirements for protecting supporting construction to ensure the necessary fire-resistance rating of horizontal assemblies. Exceptions are provided for certain building types and specific scenarios where fire-resistance ratings may not be required. Applies to building owners of Type IIB, IIIB, or VB constructions.

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

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711.2.3 Supporting construction.

BC § 711.2.3

The supporting construction shall be protected to afford the required fire-resistance rating of the horizontal assembly supported. Exception: In buildings of Type IIB, IIIB or VB construction, the construction supporting the horizontal assembly is not required to be fire-resistance-rated at the following: 1. Horizontal assemblies at the separations of incidental uses as specified by Table 509 provided the required fire-resistance rating does not exceed 1 hour.

2.Horizontal assemblies at the separations of dwelling units and sleeping units as required by Section 420.3.

3.Horizontal assemblies at smoke barriers constructed in accordance with Section 709.

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