Late last year I took a shot at getting through the sticky wicket of 8.3.3.5 with:
My take is this: example 1-- Light Hazard-- Q.R. required-- Sprinkler= "Acme Model A" listed Q.R. at max 14 x 14 and S.R. up to 20 x 20-- so max spacing = 14 x 14. example 2-- Ord Haz-- same sprinkler-- max spacing = 20 x 20, BUT if it happens that some coverage areas are 14 X 14, it is NOT considered mixing Q.R. and S.R. and got this atta boy: Brad, correct. That was the intent of the committee. Peter Schwab VP of Purchasing & Engineering Technologies I was on cloud nine the rest of the year ;) Brad -----Original Message----- From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of T. Silva Sent: Tuesday, July 07, 2015 4:04 PM To: sprinklerforum@lists.firesprinkler.org Subject: Re: Mixing EC sprinklers with Std coverage sprinklers That lays it to rest, Thanks, Larry, Tony ----- Original Message ----- From: "Larry Keeping" <lkeep...@plcfire.com> To: sprinklerforum@lists.firesprinkler.org Sent: Tuesday, July 7, 2015 12:57:12 PM Subject: RE: Mixing EC sprinklers with Std coverage sprinklers Just as a point of information, I thought I should relate to you the new text that will be entered into the forthcoming 2016 edition of NFPA 13: 8.3.3.2 Where quick-response sprinklers are installed, all sprinklers within a compartment shall be quick- response unless otherwise permitted in 8.3.3.3 , 8.3.3.4 , or 8.3.3.5 . 8.3.3.3 Where there are no listed quick-response sprinklers in the temperature range required, standard- response sprinklers shall be permitted to be used. 8.3.3.4 The provisions of 8.3.3.2 shall not apply to in-rack sprinklers. 8.3.3.5 Where a sprinkler carries a listing for both standard-response protection and quick-response protection at different coverage areas, that sprinkler shall be permitted to be installed within a compartment at the spacing for both the quick-response and standard-response listings without any separation between the areas so covered. 8.3.3.6 When existing light hazard systems are converted to use quick-response or residential sprinklers, all sprinklers in a compartment shall be changed. I think that this will satisfy your concerns - at least in the future. Best regards Larry Keeping -----Original Message----- From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Fairchild, Jack Sent: July-07-15 1:01 PM To: sprinklerforum@lists.firesprinkler.org 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 _______________________________________________ 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
