Since I seem to have time on my hands here is a continuation. Only the parts pertaining to R-2 included.
919.3.2 Use groups R-2
Single and multiple station smoke detectors or household fire warining system shall be installed and maintained in all ocupancies in use group R-2 at the following locations: In the immediate vicinity of all bedrooms, in all bedrooms, and in each story within a dwelling unit including basements.
919.4 Interconnection
Where more than one detector is required to be innstalled within an individual dwelling unit in an occupancy in use group R-2 the detectors shall be wired in such a manner that the actuation of one allarm will actuate all of the alarms in the individual unit.
