High Hazard Occupancies

NYC Admin. Code tit. 27, ch. 1, subch. 7, art. 2

in effect

NYC Admin. Code § 27-400 Application.

§ 27-400 Application. This section shall apply to the construction, alteration, and use of buildings or spaces for high hazard occupancies classified in occupancy group A under the provisions of subchapter three of this chapter.

NYC Admin. Code § 27-401 Explosion hazard and unlisted occupancies.

§ 27-401 Explosion hazard and unlisted occupancies. Buildings or spaces of high hazard occupancies that involve explosion hazards or that are not specifically provided for in this code, shall be constructed to provide any necessary additional protection adequate for the hazard involved subject to approval by the commissioner.

NYC Admin. Code § 27-402 Other requirements.

§ 27-402 Other requirements. The occupancy and use of high hazard buildings and spaces shall also be subject to the applicable requirements of chapter four of this title.

NYC Admin. Code § 27-403 Location.

§ 27-403 Location. High hazard occupancies shall not be located within, or attached to, a building occupied for any other use, unless separated from such other use by noncombustible construction having not less than a four hour fire resistance rating.

NYC Admin. Code § 27-404 Sprinkler requirements.

§ 27-404 Sprinkler requirements. Sprinkler protection meeting the construction requirements of subchapter seventeen of this chapter shall be installed in all high hazard occupancies. Where the nature of the fire hazard is such that water is not effective as an extinguishing agent, the extinguishing agent to be used, shall be subject to the approval of the fire commissioner.

NYC Admin. Code § 27-405 Ventilation of storage occupancies.

§ 27-405 Ventilation of storage occupancies. Rooms or spaces used for the storage of flammable paints, solvents, anesthetic agents, fuel or other oils having a flashpoint under two hundred degrees Fahrenheit (Tag closed cup) or other inflammable vaporous materials shall be vented to the outdoors by gravity or mechanical means, with independent supply and exhaust openings or ducts. If ventilation is provided by gravity means, the total net free openable area of supply and exhaust openings shall be equal to at least one percent of the floor area of the room, equally divided between supply and exhaust. If ventilation is provided by mechanical means, the system shall be designed to provide at least two air changes per hour. Where there are explosion hazards, see section 27-401 of this article. The construction of all ventilating systems shall be in accordance with the requirements of subchapter thirteen of this chapter.

Source: City of New York, Charter, Administrative Code and Rules (American Legal Publishing XML export, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYCadmin/0-0-0-49834Fetched: 10/24/2026