Required. All elevators having a travel distance of 25 feet (7620 mm) or more above or below the primary level of elevator access for emergency fire-fighting or rescue personnel shall conform to the requirements of Rule 211.3 of ASME A 17.1 listed in Article
VIII.
Smoke and heat detection. Approved smoke or
heat detectors shall be installed in return air ducts or plenums in
each recirculating air system with a capacity of more than 2,000 cfm
(0.94 m
3/sec) and serving more than one floor in buildings that exceed six stories in height in accordance with the mechanical code listed in Article
VIII. Actuation of the detector shall stop the fan(s) automatically and shall be of the manual-reset type. Automatic fan shutdown is not required where the system is part of an approved smoke control system.