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NYC Building Code

§ 405.4.1 — § 405.4.1

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What is NYC BC § 405.4.1?

Quick Answer

This section mandates that buildings with a floor level more than 60 feet below the finished floor of the lowest exit discharge be divided into at least two compartments of approximately equal size. The compartmentation must extend through the highest level of exit discharge serving the underground portions. Applies to building owners of certain underground structures.

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

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405.4.1 Number of compartments.

BC § 405.4.1

A building having a floor level more than 60 feet (18 288 mm) below the finished floor of the lowest level of exit discharge shall be divided into no fewer than two compartments of approximately equal size. Such compartmentation shall extend through the highest level of exit discharge serving the underground portions of the building and all levels below. Exception: The lowest story need not be compartmented where the area is not greater than 1,500 square feet (139 m 2 ) and has an occupant load of less than 10.

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