Comment from past AHJ: For a couple heads, I doubt my field inspectors would notice difference. Either is going to operate the water flow switch, and get some water on the fire. I can’t see fire spreading laterally. First head should not cause problems with first four or six heads flow at ceiling.
Move on to bigger fish. Best. Bruce Verhei > On Aug 23, 2019, at 15:31, Travis Mack via Sprinklerforum > <sprinklerforum@lists.firesprinkler.org> wrote: > > I agree with everything. This wasnt even my project. Was helping out a > customer of a colleague. > > My initial reaction was of course a single EC sidewall for LH is acceptable. > The installing contractor was pushing back saying you couldn’t do an EC HSW > for light hazard under the door. That was when I started to dig further and > noticed the missing wording in EC HSW. > > Installer was pushing back an ECOH HSW would cause the overhead to over > discharge and no longer work. I suggested to stop spending so much time and > $$ on this. Go with the ECOH HSW and pipe with same size as overhead branch > piping. That way there can be no push back. > > Just another fun Friday at the office. > > Travis Mack, CFPS, CWBSP, RME-G, SET > 480-505-9271 > MFP Design, LLC > www.mfpdesign,com > Send large files to MFP Design via: > https://www.hightail.com/u/MFPDesign > > Sent from my iPhone > >> On Aug 23, 2019, at 3:25 PM, Sean.VanGaal via Sprinklerforum >> <sprinklerforum@lists.firesprinkler.org> wrote: >> >> The standard recognizes EC is okay. The standard recognizes the hazard can >> be treated as light in the standard spray section. I would assume this was >> just missed or overlooked with regards to the EC section when they added the >> “light hazard” part to the standard spray section. >> >> My opinion is this should be treated as LH but since you don’t have concrete >> evidence in the book pointing to a Light hazard EC sidewall you should have >> a conversation with the AHJ. Personally I think it unnecessary to have an >> 11.2K sprinkler required at this location for the extremely slim chance of a >> fire starting under and open garage door. Further, you said it is an OH >> building, you are just looking to control a fire from spreading, not >> suppressing the fire. If the 8K EC sidewall can’t control a fire under your >> 16x14 door long enough for the fire department to show up, you still have >> all those other sprinklers around the door to help out. With oodles and >> oodles of safety margin at every step of the way to get to your final >> design. Again, this is my opinion and it all comes down to the person on >> the other side of table if they agree or not. >> >> I actually submitted a public input on this very topic for the 2022 edition >> to try to get LH added to the EC section because we have run across this a >> few times. Fingers crossed it goes through! >> >> Thanks, >> Sean VG >> >> From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] >> On Behalf Of Travis Mack via Sprinklerforum >> Sent: Friday, August 23, 2019 2:26 PM >> To: sprinklerforum@lists.firesprinkler.org >> Cc: Travis Mack <tm...@mfpdesign.com> >> Subject: [EXTERNAL] Re: Ex cov under OH Door >> >> I agree that the ex cov sprinklers can be used. But do you need one listed >> for Ordinary Hazard or can you use one listed for light hazard. >> >> Spray sprinklers specifically say light is acceptable. Ex cov doesn’t say >> light is acceptable. >> >> Question comes from an owner question. They have OH doors that are 16x14. >> Current design is 1 spray sprinkler on each side because 14’ max spacing. >> Owner wants 1 sprinkler. Question is just if can use ex cov sidewall listed >> for light or do they need to go OH listing. >> >> Travis Mack, CFPS, CWBSP, RME-G, SET >> 480-505-9271 >> MFP Design, LLC >> www.mfpdesign,com >> Send large files to MFP Design via: >> https://www.hightail.com/u/MFPDesign >> >> Sent from my iPhone >> >> On Aug 23, 2019, at 2:21 PM, Mike Stossel via Sprinklerforum >> <sprinklerforum@lists.firesprinkler.org> wrote: >> >> NFPA 2013 2019 - 11.3.2 (8) Extended coverage sprinklers installed to >> protect areas below a single overhead door(s) >> >> Mike Stossel SET >> <image002.png> >> 36 Barren Road >> East Stroudsburg, PA 18302 >> Office: 973-670-2627 >> m...@knssprinkler.com >> >> From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org> On >> Behalf Of Travis Mack via Sprinklerforum >> Sent: Friday, August 23, 2019 5:13 PM >> To: sprinklerforum@lists.firesprinkler.org >> Cc: Travis Mack <tm...@mfpdesign.com> >> Subject: Ex cov under OH Door >> >> Question has been brought up. Can you use ex cov sidewall listed for light >> hazard under overhead door in an ordinary hazard building? >> >> I was under the impression it was not an issue. There is wording in section >> on standard spray sidewall that you can. But the same wording is not in the >> section under ex cov sidewall sprinklers. Since location has meaning, it >> made me question. >> >> >> >> Travis Mack, CFPS, CWBSP, RME-G, SET >> 480-505-9271 >> MFP Design, LLC >> www.mfpdesign,com >> Send large files to MFP Design via: >> https://www.hightail.com/u/MFPDesign >> >> Sent from my iPhone >> _______________________________________________ >> Sprinklerforum mailing list >> Sprinklerforum@lists.firesprinkler.org >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >> _______________________________________________ >> Sprinklerforum mailing list >> Sprinklerforum@lists.firesprinkler.org >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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