Section 510-RICR-00-00-4.6 - Chapter 6603.2 Duct sizing Delete and substitute the following:603.2 Duct sizing ducts installed within a single dwelling unit shall be sized in accordance with ACCA Manual D or other approved methods. Ducts installed within all other buildings shall be sized in accordance acceptable methods. 606.2.1 Delete and substitute the following:606.2.1 Return air systems smoke detectors listed for use in air distribution systems shall be located as follows:(1) Downstream of the air filters and ahead of any branch connections in air supply systems having a capacity greater than 944 L/Sec (2000 ft3/min)(2) At each story prior to the connection to a common return and prior to any recirculation or fresh air inlet connection in air return systems having a capacity greater than 7080 L/sec (15,000 ft3/min) and serving more than one (1) story. Revise section 607.5.5 as follows:
607.5.5 Shaft Enclosures: Shaft enclosures in use group I and in high-rise structures that are permitted to be penetrated by ducts and air transfer openings shall be protected with approved fire and smoke dampers, installed in accordance with their listing. All other use group shaft enclosure penetrations shall be protected with approved fire dampers installed in accordance with their listing. Retain sections 1, 1.1, 1.2, 1.3, 1.4 and delete exceptions 2, 3, 4 and 5.
510 R.I. Code R. 510-RICR-00-00-4.6
Amended effective8/1/2019
Amended effective 2/1/2022