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Group R-1 dwelling units in accordance with Table 907.9.1.3 shall be provided with a visible alarm notification appliance, activated by both the in-room smoke detector and the building fire alarm system.

TABLE 907.9.1.3
VISIBLE AND AUDIBLE ALARMS
NUMBER OF
DWELLING UNITS
DWELLING UNITS WITH
VISIBLE AND AUDIBLE ALARMS
6 to 25 2
26 to 50 4
51 to 75 7
76 to 100 9
101 to 150 12
151 to 200 14
201 to 300 17
301 to 400 20
401 to 500 22
501 to 1,000 5% of total
1,001 and over 50 plus 3 for each 100 over 1,000

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