So it seems the intent is that the K5.6 sprinkler should be the same response as the listing for EC sprinkler AT THE SPACING IT’S BEING USED. In my particular case, the 18’x18’ spacing is listed as SR, so the K5.6 sprinkler should also be SR. But what if I’m using this EC sprinkler MOSTLY at 18’x18’, but a few are being used to cover a smaller area of 14’x14’. So now I’m using an EC sprinkler that are listed as both SR (18’x18’) and QR (14’x14’) in the same compartment (specifically allowed by the new 8.3.3.5 section in the 2016 edition). So should the K5.6 sprinks be QR or SR? And let’s make it more complicated – let’s say the nearest EC sprinkler to the K5.6 sprinkler to the north is spaced at 18’x18’ (SR) and the nearest EC sprinkler to the south is spaced at 14’x14’ (QR).
Ed From: Sprinklerforum [mailto:[email protected]] On Behalf Of Roland Huggins Sent: Thursday, February 15, 2018 5:51 PM To: [email protected] Subject: Re: QR/SR Sprinklers I would apply then 2016 edition to the 2013 ed as CLARIFICATION. We added to answer your question. It is NOT The thermal element. It is the listing of the sprinkler in order to be QR. Keep in mind that it was only a cycle or two ago where there was NO restriction on mixing thermal sensitivity for new installations. Modifying an existing systems had a restriction but not totally new (yea go figure). We added it but didn’t think about the EC sprinkler having a fast response link but a SR rating (common at 20 X 20 but also smaller areas for lower temp. ratings). Next question: Can I use said 20 x 20 spaced EC sprinkler in a light hazard occupancy? Roland Roland Huggins, PE - Senior VP Engineering American Fire Sprinkler Assn. Dallas, TX http://www.firesprinkler.org Fire Sprinklers Saves Lives On Feb 15, 2018, at 2:28 PM, Ed Kramer <[email protected] <mailto:[email protected]> > wrote: Reference section 8.3.3.2 of the 2013 edition of NFPA 13: “Where QR sprinklers are installed, all sprinklers within a compartment shall be quick-response unless otherwise permitted in 8.3.3.3.” Section 8.3.3.3 isn’t applicable for this question. I’m protecting an OH II sales area with EC sprinklers spaced (mostly) at 18’x18’. This particular sprinkler is listed as SR at that spacing, but is listed as QR for 14’x14’ and smaller spacing. This sales area has a small 20 sf nook (not a separate compartment) that requires an additional sprinkler. My intent is to protect that nook with a K5.6 sprinkler. Should the K5.6 sprinkler be SR or QR? The answer is probably SR since the EC sprinklers are installed at a spacing that has a SR listing. But that would be mixing a standard-response element with a fast-response element – something I’ve been led to believe is not cool. The 2016 flavor of NFPA 13 has a new section 8.3.3.5 that allows mixing a SR listing with a QR listing as long as it’s the same sprinkler (and therefor both have the same fast-response element). Anybody want to give their 2 cents? Ed Kramer Bamford Fire Sprinkler Co., Inc. 5134 Merriam Dr./Shawnee Mission, KS 66203 Phone: 913-432-6688 Fax: 913-432-5294 Cell: 785-766-4894 <mailto:[email protected]> [email protected] _______________________________________________ Sprinklerforum mailing list <mailto:[email protected]> [email protected] <http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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