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NYC Mechanical Code

§ 506.3.8.1 — § 506.3.8.1

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What is NYC MC § 506.3.8.1?

Quick Answer

This section mandates that ductwork large enough for personnel entry must have at least one approved opening of specified dimensions. It also requires that the duct and its supports be capable of bearing additional loads. Applies to building owners responsible for ductwork installation and maintenance.

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

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506.3.8.1 Personnel entry.

MC § 506.3.8.1

Where ductwork is large enough to allow entry of personnel, not less than one approved or listed opening having dimensions not less than 22 inches by 20 inches (558.8 mm by 508 mm) shall be provided in the horizontal sections, and in the top of vertical risers. Where such entry is provided, the duct and its supports shall be capable of supporting the additional load and the cleanouts specified in Section 506.3.8 are not required. Where personnel entry is not possible for cleaning the interior of vertical ducts, suitable provisions shall be made to clean the vertical duct in its entirety as well as for cleaning the base of the vertical riser.

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