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NYC Building Code

§ 2603.4.1.13 — § 2603.4.1.13

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What is NYC BC § 2603.4.1.13?

Quick Answer

This section permits the use of foam plastic spray applied to specific components in Type V construction without a thermal barrier, provided it meets certain specifications regarding thickness, density, and flame spread index. Applies to building owners involved in Type V construction projects.

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

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2603.4.1.13 Type V construction.

BC § 2603.4.1.13

Foam plastic spray applied to a sill plate, joist header and rim joist in Type V construction is permitted without a thermal barrier, subject to all of the following: 1. The maximum thickness of the foam plastic shall be 3 1/4 inches (82.6 mm).

2.The density of the foam plastic shall be in the range of 1.5 to 2.0 pcf (24 to 32 kg/m 3 ).

3.The foam plastic shall have a flame spread index of 25 or less and an accompanying smoke-developed index of 450 or less when tested in accordance with ASTM E 84 or UL 723.

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