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What is NYC BC § 722.4.2.1?

Quick Answer

This section addresses the fire-resistance rating for multi-wythe walls composed of different materials, specifically concrete, concrete masonry units, and clay masonry units. The ratings can be determined using specified tables for each material type. Applies to building owners involved in wall construction and 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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722.4.2.1 Multi-wythe walls of different material.

BC § 722.4.2.1

For walls that consist of two or more wythes of different materials (concrete or concrete masonry units) in combination with clay masonry units, the fire-resistance rating of the different materials shall be permitted to be determined from Table 722.2.1.1 for concrete; Table 722.3.2 for concrete masonry units or Table 722.4.1(1) or 722.4.1(2) for clay and tile masonry units.

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