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415.11.11.2 Combustible nonmetallic exhaust ducts.
Automatic fire sprinkler system protection shall be provided in combustible nonmetallic exhaust ducts where the largest cross-sectional diameter of the duct is equal to or greater than 10 inches (254 mm).
Exception: Ducts need not be provided with automatic sprinkler protection as follows:
1. Ducts listed or approved for applications without automatic sprinkler system protection.
2. Ducts not more than 12 feet (3658 mm) in length installed below ceiling level.
415.11.11.3 Automatic sprinkler locations.
Sprinkler systems shall be installed at 12-foot (3658 mm) intervals in horizontal ducts and at changes indirection. In vertical ducts, sprinklers shall be installed at the top and at alternate floor levels.
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.
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