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NYC Building Code

§ 1409.10 — § 1409.10

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What is NYC BC § 1409.10?

Quick Answer

This section mandates the installation of an approved thermal barrier, such as 5/8-inch Type X gypsum wallboard, to separate high-performance laminate (HPL) from the interior of a building. The barrier must limit temperature rise during fire exposure as per specified standards. 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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1409.10 Thermal barriers.

BC § 1409.10

HPL shall be separated from the interior of a building by an approved thermal barrier consisting of 5/8-inch (15.9 mm) Type X gypsum wallboard or equivalent thermal barrier material that will limit the average temperature rise of the unexposed surface to not more than 250°F (121°C) after 20 minutes of fire exposure in accordance with the standard time temperature curve of ASTM E 119 or UL 263. The thermal barrier shall be installed in accordance with criteria established by testing performed in accordance with UL 1715, where the thermal barrier shall remain in place for 20 minutes.

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