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NYC Building Code

§ 722.5.1.2.2 — § 722.5.1.2.2

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What is NYC BC § 722.5.1.2.2?

Quick Answer

This section outlines the fire resistance determination for structural steel columns using gypsum wallboard, based on the weight-to-heated-perimeter ratio (W/D). It specifies that for columns with a W/D greater than 3.65, the required gypsum wallboard thickness aligns with that of a W14 x 233 wide flange shape. Applies to building owners responsible for fire safety compliance.

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

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722.5.1.2.2 Gypsum wallboard equivalent to concrete.

BC § 722.5.1.2.2

The determination of the fire resistance of structural steel columns from Figure 722.5.1(4) is permitted for various thicknesses of gypsum wallboard as a function of the weight-to-heated-perimeter ratio (W/D) of the column. For structural steel columns with weight-to-heated-perimeter ratios (W/D) greater than 3.65, the thickness of gypsum wallboard required for specified fire-resistance ratings shall be the same as the thickness determined for a W14 x 233 wide flange shape.

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