// CODE SNIPPET
[F] 403.3.1 Number of Sprinkler Risers and System Design
JUMP TO FULL CODE CHAPTER
Each sprinkler system zone in buildings that are more than 420 feet (128 m) in building height shall be supplied by not fewer than two risers. Each riser shall supply sprinklers on alternate floors. If more than two risers are provided for a zone, sprinklers on adjacent floors shall not be supplied from the same riser.