While I think the logic path you follow for covering half a remote area one direction and then another makes some sense, the Committee was not willing to consider a two-sided scenario. The rule was written such that the area above the ceiling is only exposed on one side. This way, going two or three sprinklers deep would prevent the fire from jumping the wall. The committee would not consider additional measures. The committee discussed the back of a grocery store as the base example in their debates. Often the back wall that separates the storage from the sales floor does not go all the way to the ceiling. This was a remedy to not have to install sprinklers throughout the otherwise non-combustible, nearly-concealed space above the grocery store ceiling.
It should be recognized that the above is my opinion as a member of the NFPA 13 Committee, and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects and should therefore not be considered, nor relied upon, as the official position of the the NFPA, nor any of their technical committees. Sincerely, Cecil Bilbo Academy of Fire Sprinkler Technology Champaign, IL 217.607.0325 www.sprinkleracademy.com<http://www.sprinkleracademy.com> [email protected]<mailto:[email protected]> ?? OUR STUDENTS SAVE LIVES!! ________________________________ From: Sprinklerforum <[email protected]> on behalf of Kyle.Montgomery via Sprinklerforum <[email protected]> Sent: Friday, February 12, 2021 10:29 AM To: [email protected] <[email protected]> Cc: Kyle.Montgomery <[email protected]>; Brian Harris <[email protected]> Subject: RE: Bathroom Chase Brian, I agree with Skyler here. The picture may not look like what you're doing, but the book would be hard to carry if there were a figure representing every scenario. The intent seems to apply though: You've got a space that is sprinklered only because it is open to an adjacent sprinklered space. I would correct Skyler and say that you only need to extend 0.6 times the square root of the remote area, but since you'll have to do that in all directions, then it ends up being about 1.2 total. I would also agree with JD, Nick, and others in questioning whether the area needs to have sprinklers at all. But I've seen that interpreted both ways by an AHJ. -Kyle M -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Brian Harris via Sprinklerforum Sent: Friday, February 12, 2021 7:53 AM To: [email protected] Cc: Brian Harris <[email protected]> Subject: [EXTERNAL] RE: Bathroom Chase Skyler- Thank you. It doesn't look like the example shown in A.8.15.23.3 is the same situation I'm running in to. Brian Harris, CET BVS Systems Inc. bvssytemsinc.com -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Skyler Bilbo via Sprinklerforum Sent: Friday, February 12, 2021 9:21 AM To: [email protected] Cc: Skyler Bilbo <[email protected]> Subject: Re: Bathroom Chase There is a section that talks about only going back 1.2 times the square root of the remote area beyond the ceiling. NFPA 13, 2013 edition, Section 8.15.23. Skyler Bilbo On Fri, Feb 12, 2021 at 7:25 AM Brian Harris via Sprinklerforum < [email protected]> wrote: > There's a chase between (2) bathrooms that has an access door which I > assume is for maintenance. The drywall stops 6" above ceiling, > basically making the entire structure above the ceiling "open". I > can't imagine we would need to provide protection at the deck throughout the > whole area. > Seems like I remember something about only needing to protect the deck > within a given area? > > Brian Harris, CET > BVS Systems Inc. > bvssytemsinc.com > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkle > r.org_listinfo.cgi_sprinklerforum-2Dfiresprinkl&d=DwICAg&c=wn3mZQLIuIn > h2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A&m=G8nBoayLpp > OEKnsHYV_cnN1XzYYpUKF_Yd4I-drhqSY&s=ZDjvdpiVD244i6ELZm22TPaWz75M8tgfJk > USdh4OLvQ&e= > er.org > _______________________________________________ Sprinklerforum mailing list [email protected] https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwICAg&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A&m=G8nBoayLppOEKnsHYV_cnN1XzYYpUKF_Yd4I-drhqSY&s=tLVPgHHbvBd2rFhQL9w_SBYxNGVUuMkw5c1_pau5rIg&e= _______________________________________________ Sprinklerforum mailing list [email protected] https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwICAg&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A&m=G8nBoayLppOEKnsHYV_cnN1XzYYpUKF_Yd4I-drhqSY&s=tLVPgHHbvBd2rFhQL9w_SBYxNGVUuMkw5c1_pau5rIg&e= _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
