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What is NYC BC § 1203.5.1.1.3?

Quick Answer

This section outlines the requirements for openings below grade that provide natural ventilation. It specifies that the outside horizontal clear space, measured perpendicular to the opening, must be one and one-half times the depth of the opening. Applies to building owners with structures featuring below-grade openings.

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

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1203.5.1.1.3 Openings below grade.

BC § 1203.5.1.1.3

Where openings below grade provide required natural ventilation, the outside horizontal clear space measured perpendicular to the opening shall be one and one-half times the depth of the opening. The depth of the opening shall be measured from the average adjoining ground level to the bottom of the opening.

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