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NFPA 804 The way to zone Suppression systems

Question asked by sbkim on Jan 3, 2019

10.4.1 Cable Spreading Room Suppression systems shall be zoned to limit the area of protection to that which the drainage system can handle with any two adjacent systems actuated.


How can we zone the systems ?  A Spacious cable spreading room is designed with spray system. If the whole room is actuated by spray system, the fire water is too huge for pump and drainage system.


The systems may be zoned  by fire detectors and deluges valve which cover each zone.


Is the structureal divison necessary between zones, for example, walls between zone or curtain wall on the ceiling  ?