607.6.2.1 Ceiling radiation dampers.
MC § 607.6.2.1
Ceiling radiation dampers shall be tested in accordance with Section 607.3.1. Ceiling radiation dampers shall be installed in accordance with the details listed in the fire-resistance-rated assembly and the manufacturer's instructions and listing. Ceiling radiation dampers are not required where any of the following apply: 1. Tests in accordance with ASTM E 119 or UL 263 have shown that ceiling radiation dampers are not necessary to maintain the fire-resistance rating of the assembly.
2.Where exhaust duct penetrations are protected in accordance with Section 714.4.2 of the New York City Building Code, are located within the cavity of a wall, and do not pass through another dwelling unit or tenant space.
3.Where duct and air transfer openings are protected with a duct outlet protection system tested as part of a fire-resistance-rated assembly in accordance with ASTM E 119 or UL 263 and the building is protected throughout with an automatic sprinkler system in accordance with Chapter 9 of the New York City Building Code.
