This is correct and very relevant to the design of open head fixed spray systems. There are many other considerations relative to this type of system that must be considered and complied with. Many years ago this type of work was appropriately termed “Special Hazard” and as the term suggests, it is definitely Special!
Mark at Aero 602 820-7894 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Ben Young via Sprinklerforum Sent: Friday, October 18, 2019 9:03 AM To: 321 via Sprinklerforum <[email protected]> Cc: Ben Young <[email protected]>; Mark.Phelps <[email protected]> Subject: [EXTERNAL] Re: deluge sprinkler Just to try and keep this simple as well, if all of that is protected by a one single deluge system then you have to calc it all because its open. That's how deluge systems work, right? If you have separate deluge systems then you have to look at if its possible for a fire to activate more than one system with the same fire (say two levels with a large open communicating space, or open grate flooring? Or even just two tanks that are close together. Benjamin Young On Fri, Oct 18, 2019 at 11:12 AM Mark.Phelps via Sprinklerforum <[email protected]<mailto:[email protected]>> wrote: If you haven’t gotten a response on this question, I’ll offer a couple of questions to gather information. 1. Are there exterior walls that enclose the individual floors? 2. Are the floors solid with large openings, or grated with large openings? 3. What type of equipment is housed on the floors. 4. What industry do these buildings serve? If you can provide this information, I believe you will get some responses to your questions. Mark at Aero 602 820-7894 From: Sprinklerforum [mailto:[email protected]<mailto:[email protected]>] On Behalf Of Easter, Tim (Contractor) via Sprinklerforum Sent: Friday, October 18, 2019 5:12 AM To: [email protected]<mailto:[email protected]> Cc: Easter, Tim (Contractor) <[email protected]<mailto:[email protected]>> Subject: [EXTERNAL] deluge sprinkler Which NFPA code and section describe a situation in the building with a deluge system, that drive the requirement to flow all floors, both buildings simultaneously? The floors have large openings between floors for equipment. There are no walls separating different sections of a single floor. Best, Timothy M. Easter, P.E. Fire Protection Engineer BAE Systems, Inc. T: +1 423 578 1713 | E: [email protected]<mailto:[email protected]> _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org<https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwMFaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=dLwiR71i_XhSFqam3ZLeaFLiQJ3cDTUB0ReB4-yDDcg&m=f-fa0jxrYwPBQ5-W2CUUOKr4Urkwwi2lVxwwX6sIULA&s=TV6r5q5vTRWWtfN0kbn_15PlgYF_8sjjkSEXwYj4Pvo&e=>
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