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NYC Building Code

§ 722.3.1.4 — § 722.3.1.4

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What is NYC BC § 722.3.1.4?

Quick Answer

This section defines the equivalent thickness of completely filled hollow concrete masonry when using specific loose-fill materials that comply with various ASTM standards. The statute outlines acceptable materials such as sand, gravel, and expanded aggregates. Applies to building owners involved in construction or renovation projects utilizing these materials.

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

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722.3.1.4 Airspaces and cells filled with loose-fill material.

BC § 722.3.1.4

The equivalent thickness of completely filled hollow concrete masonry is the actual thickness of the unit where loose-fill materials are: sand, pea gravel, crushed stone, or slag that meet ASTM C 33 requirements; pumice, scoria, expanded shale, expanded clay, expanded slate, expanded slag, expanded fly ash, or cinders that comply with ASTM C 331; or perlite or vermiculite meeting the requirements of ASTM C 549 and ASTM C 516, respectively.

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