Charles, NFPA 13 (2002) 8.3.5 Thread Size Limitations
Tony Liddic, CET Fire Sprinkler Designer AEC Fire & Security 400 Fame Rd. West Carrollton, OH 45449 937-866-4158 937-865-0212 fax [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Charles Thurston Sent: Friday, May 04, 2007 2:12 PM To: Greg McGahan Subject: Re: 1/2" thread - 8 K sprinklers Hello Greg, Wednesday, April 25, 2007, 12:19:42 PM, you wrote: > NFPA 13 clearly states that we can not use 8.0 k heads with 1/2" threads in > new installations. I assume there are reasons for this but I do not know > them. Does anybody have the chapter and verse where it states this handy ? I can not find it. > BUT, we have a new job with pipe on the floor and 1/2" welded outlets for > 5.6 k sprinklers. The problem is we ran into some lights and are having to > move some pipe which blows our calcs. (Our designer made a mistake and did > not realize that the lights are not hanging, but are mounted to the > purlins.) > We had in excess of 10% cushion and now we have -5%. If we use the 8K heads > we are fine. > The other option is to reorder all of the branchline piping 1 size larger. > We reflowed the hydrants to confirm the water and lost 10 psi residual to > make matters worse. > Does anyone on the committee have any input before I ask the AHJ to consider > this change? > Greg > Living Water Fire Protection, LLC > 1160 McKenzie Road > Cantonment, FL 32533 > 850-937-1850 > Fax: 850-937-1852 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) -- Best regards, Charles mailto:[EMAIL PROTECTED] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/787 - Release Date: 5/3/2007 2:11 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/787 - Release Date: 5/3/2007 2:11 PM _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
