I do not disagree that the pattern is not perfect. However, the goal is fire control, not fire suppression. In light and ordinary hazards occupancies especially, as long as the fire stays contained, we have met the goal of NFPA 13. In addition, we need to ensure the sprinkler operates in a reasonable time. In my opinion, the location of the sprinklers to ensure operation in a timely manner is just or more important to me.
*The above is my opinion and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects. This is provided with the understanding that the AFSA assumes no liability for this opinion or actions taken on it and they are not to be considered the official position of the **AFSA, and/or NFPA or its technical committees.**AFSA cannot provide design or consulting engineering services, and this opinion should therefore not be considered, nor relied upon, as such.* Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org <https://www.facebook.com/firesprinkler.org/> <https://twitter.com/afsa/status/1039528345367732224> <https://www.linkedin.com/company/american-fire-sprinkler-association-afsa-/> <https://www.instagram.com/firesprinklerorg/> *Our members are at the heart of everything we do.* *Are you a member with a technical question? * Don't forget one of the most valuable resources that American Fire Sprinkler Association provides is technical reviews from our Engineering & Technical Services Department. It’s like having an FPE on your staff. Visit www.firesprinkler.org/interp <https://www.firesprinkler.org/WWW/Contacts/Sign_In.aspx?WebsiteKey=3dff22a3-0306-479c-bccc-7aa1986c8ada&LoginRedirect=true&returnurl=/WWW/Technical_Services/Informal_Interpretations/WWW/Informal_Interpret/Member_View.aspx?hkey=8023e65f-a2ad-4465-9920-0f9313a07324> to submit a question today! On Thu, Dec 16, 2021 at 6:42 PM AKS-Gmail-IMAP via Sprinklerforum < sprinklerforum@lists.firesprinkler.org> wrote: > One should realize what happens when a continuous deluge of water, ie fire > sprinkler flow, encounters a piping group or an electrical conduit group, > especially level piping groups. The water flows on the piping surface and > then drops off the pipe at the pipe’s bottom. What hits the top drops off > the bottom. Continuous water streams will still be raining on whatever is > directly underneath the piping, but not in a random distribution. Ask any > on site challenger to think about if they would get soaked while standing > underneath the piping group. > > > On Dec 16, 2021, at 1:59 PM, John Denhardt via Sprinklerforum < > sprinklerforum@lists.firesprinkler.org> wrote: > > > > NFPA 13 - 2019 - The answer depends on the hazard and the sprinkler type. > > ESFR and CMSA do have requirements that address this issue. For light > and > > ordinary hazards, as long as the individual widths are 4' or less with > some > > separation to allow water to hit the floor,and the sprinkler deflector is > > above the obstruction, no additional sprinklers are needed. > > > > *The above is my opinion and has not been processed as a formal > > interpretation in accordance with the NFPA Regulations Governing > Committee > > Projects. This is provided with the understanding that the AFSA assumes > no > > liability for this opinion or actions taken on it and they are not to be > > considered the official position of the **AFSA, and/or NFPA or its > > technical committees.**AFSA cannot provide design or consulting > engineering > > services, and this opinion should therefore not be considered, nor relied > > upon, as such.* > > > > Thanks, > > John > > > > John August Denhardt, PE > > *Vice President, Engineering and Technical Services* > > > > *American Fire Sprinkler Association* > > m: p: 301-343-1457 > > 214-349-5965 ext 121 > > w: firesprinkler.org > > <https://www.facebook.com/firesprinkler.org/> > > <https://twitter.com/afsa/status/1039528345367732224> > > < > https://www.linkedin.com/company/american-fire-sprinkler-association-afsa-/ > > > > <https://www.instagram.com/firesprinklerorg/> > > > > *Our members are at the heart of everything we do.* > > > > > > *Are you a member with a technical question? * > > > > Don't forget one of the most valuable resources that American Fire > > Sprinkler Association provides is technical reviews from our Engineering > & > > Technical Services Department. It’s like having an FPE on your staff. > Visit > > www.firesprinkler.org/interp > > < > https://www.firesprinkler.org/WWW/Contacts/Sign_In.aspx?WebsiteKey=3dff22a3-0306-479c-bccc-7aa1986c8ada&LoginRedirect=true&returnurl=/WWW/Technical_Services/Informal_Interpretations/WWW/Informal_Interpret/Member_View.aspx?hkey=8023e65f-a2ad-4465-9920-0f9313a07324 > > > > to > > submit a question today! > > > > > > On Thu, Dec 16, 2021 at 11:29 AM Joe Burtell via Sprinklerforum < > > sprinklerforum@lists.firesprinkler.org> wrote: > > > >> I apologize if this has already been asked and answered. I could have > sworn > >> NFPA addressed this but I am looking for when a group of mechanical > pipes > >> are racked and create a wide obstruction, what the minimum gaps between > >> pipe to not consider it a solid obstruction? Can someone point me to the > >> correct section, please? > >> > >> Best regards, > >> > >> *Joe Burtell, SET, CFPS* > >> > >> [image: Burtell Fire_Small] > >> > >> Phone | Fax | Mobile| Text *406-204-4653 <++1-406-204-4653>* > >> > >> 116 N. 11th Street | Billings, MT 59101 > >> > >> Email: j...@burtellfire.com > >> > >> Web Site: http://www.burtellfire.com > >> > >> *“**The bitterness of poor quality remains long after the sweetness of > low > >> price is forgotten.**”* > >> > >> *NOTICE:* The information contained in this e-mail transmission is > >> intended only for use of the individual or entity named above. This > e-mail > >> transmission, and any documents, files, previous e-mail transmissions or > >> other information attached to it, may contain confidential information > that > >> is legally privileged. If you are not the intended recipient of this > >> e-mail transmission, or the employee or agent responsible for > delivering it > >> to the intended recipient, you are hereby notified that any disclosure, > >> dissemination, distribution, copying or other use of this transmission > or > >> any of the information contained in or attached to this e-mail is > strictly > >> prohibited. If you have received this e-mail transmission in error, > please > >> immediately notify us by return e-mail transmission and destroy the > >> original e-mail transmission as well as its attachments without reading > or > >> saving it in any manner. Thank you. > >> _______________________________________________ > >> 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 > _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
