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What is NYC AC § 27-321?

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This section regulates the use of combustible materials in construction, limiting their use to construction group II unless otherwise permitted in construction group I. It allows for the integration of combustible aggregates with other materials to create a noncombustible mixture, provided it meets the noncombustibility standards outlined in the code. Applies to building owners involved in construction projects.

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

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§ 27-321 Use of combustibles.

AC § 27-321

The use of combustible component materials in units or assemblies shall be limited to construction group II, except as hereinafter expressly permitted in construction group I. Combustible aggregates may be integrated with other materials to form a noncombustible material provided that the entire mixture, in the form in which it is to be used in construction, meets the requirement of this code for noncombustibility.

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