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What is NYC BC § 3306.9.10.2?

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This section establishes that floor openings in any building shall not exceed 25 percent of the gross floor area unless a registered design professional provides evidence to the commissioner that larger openings will not compromise structural stability. Applies to building owners and designers involved in structural modifications.

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

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3306.9.10.2 Floor openings not to aggregate more than 25 percent of the gross floor area.

BC § 3306.9.10.2

Openings in any floor shall not aggregate more than 25 percent of the area of that floor unless it can be shown by submission from a registered design professional to the satisfaction of the commissioner that larger openings will not impair the stability of the structure.

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