Thanks. That gives rise to a trick question. What if this area has EC sprinklers at different spacing. Say for arguments sake, some at 20'x20' and some 12'x12'. Would the standard coverage sprinklers in the same compartment have to be QR or SR?
Tony ----- Original Message ----- From: "Jack Fairchild" <jfairch...@ballinger.com> To: sprinklerforum@lists.firesprinkler.org Sent: Tuesday, July 7, 2015 11:01:20 AM Subject: RE: Mixing EC sprinklers with Std coverage sprinklers What Scot said, but the most conservative answer is once an EC head is installed with the small spacing it is by nature QR and all heads in the space would need to be QR. Jack Fairchild -----Original Message----- From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Greg McGahan Sent: Tuesday, July 07, 2015 10:26 AM To: sprinklerforum@lists.firesprinkler.org Subject: Re: Mixing EC sprinklers with Std coverage sprinklers I lost the original question ...but I think that the AFSA has a recent informal interp related to this issue Greg McGahan Living Water Fire Protection, LLC <http://www.livingwaterfp.com> 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 fax 850-937-1852 On Tue, Jul 7, 2015 at 9:07 AM, å... .... <eurekaig...@gmail.com> wrote: > Interesting question. If the activation temperatures are close to the > same value, then I would match the RTI of the standdard sprinklers > with the imputed RTI of the EC. > > An obvious caveat is if the specifications or engineeering report > stipulate the QR in this compartment. > > The NFPA 13 intent, I believe, is to prevent QR sprinklers from > activating when they are further away from the fire, in the presence > of SR sprinklers when these SR sprinklers are nearer to the fire. > > If the compartment is smaller than the design area,...then the case > can be made that the hydraulic design will account for all sprinklers > activating, regardless of their intended order of activation (1st > ring, 2nd ring, etc.) as manipulated by the RTI of the sprinkler. > Consider what is to be protected from fire by the different sprinklers > and modify your judgment accordingly. > > Scot Deal > Excelsior Fire/Risk Engineering > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.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