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NYC Building Code

§ 722.5.1.3 — § 722.5.1.3

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What is NYC BC § 722.5.1.3?

Quick Answer

This section outlines the method for determining the fire resistance of wide-flange structural steel columns that are protected with spray-applied fire-resistant materials. It includes a specific equation for calculation and an exception for columns with intumescent or mastic coatings. Applies to building owners involved in 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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722.5.1.3 Spray-applied fire-resistant materials.

BC § 722.5.1.3

The fire resistance of wide-flange structural steel columns protected with spray-applied fire-resistant materials, as illustrated in Figure 722.5.1(5), shall be permitted to be determined from the following expression: R = [C 1 (W/D) + C 2 ] h (Equation 7-13) where: R = Fire resistance (minutes). h = Thickness of spray-applied fire-resistant material (inches). D = Heated perimeter of the structural steel column (inches). C 1 and C 2 = Material-dependent constants. W = Weight of structural steel column (pounds per linear foot). Exception: The fire resistance of structural steel columns protected with intumescent or mastic fire-resistant coatings shall be determined on the basis of fire-resistance tests in accordance with Section 703.2.

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