416.1 General.

The provisions of this section shall apply to the construction, installation and use of buildings and structures, or parts thereof, for the application of flammable paints, varnishes and lacquers or other flammable materials or mixtures or compounds used for painting, varnishing, staining or similar purposes. Such construction and equipment shall comply with the New York City Fire Code.

416.2 Spray rooms.

Spray rooms shall be enclosed with not less than 2-hour fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both. Floors shall be waterproofed and drained in an approved manner.

416.2.1 Surfaces.

The interior surfaces of spray rooms shall be smooth and shall be so constructed to permit the free passage of exhaust air from all parts of the interior and to facilitate washing and cleaning, and shall be so designed to confine residues within the room. Aluminum shall not be used.

416.2.2 Ventilation.

Mechanical ventilation and interlocks with the spraying operation shall be in accordance with the New York City Mechanical Code.

416.3 Spraying spaces.

Spraying spaces shall be ventilated with an exhaust system capable of at least six air changes per hour to prevent the accumulation of flammable mist or vapors in accordance with the New York City Mechanical Code. Where such spaces are not separately enclosed, noncombustible spray curtains shall be provided to restrict the spread of flammable vapors.