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8.2.3.6.1
Calculations for dry pipe system water delivery shall be based on the hazard shown in Table 8.2.3.6.1.
Table 8.2.3.6.1 Dry Pipe System Water Delivery
Hazard Number of Most Remote Sprinklers Initially Open Maximum Time of Water Delivery (seconds)
Light 1 60
Ordinary I 2 50
Ordinary II 2 50
Extra I 4 45
Extra II 4 45
High piled 4 40
8.2.3.6.2
The calculation program and method shall be listed by a nationally recognized testing laboratory.
8.2.3.6.3
For dry pipe systems protecting dwelling unit portions of any occupancy, the sprinklers in the dwelling unit shall have a maximum water delivery time of 15 seconds to the single most remote sprinkler.
8.2.3.6.4
Residential sprinklers shall be listed for dry pipe applications.

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