Exactly correct. John Drucker Fire Protection Subcode Official (AHJ) Red Bank, NJ
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roland Huggins Sent: Wednesday, April 25, 2007 1:14 PM To: [email protected] Subject: Re: 1/2" thread - 8 K sprinklers George is practicing skating on some mighty thin ice. The problem would be that it isn't an existing system until AFTER it is accepted. This requirement has been in the standard a long time so whatever the basis, it is lost as ancient history. A reasonable assumption (since it is allowed for existing systems, thus must still work) is that the 1/2 NPT unnecessary restricts the flexibility of a system that already has a higher flow demand than typically provided by K 5.6. Roland On Apr 25, 2007, at 9:38 AM, George Church wrote: > I wouldn't see the harm in asking. > You could also go inand install the k5.6 heads, re-run the calcs, and > then retro the 1/2 K8 heads in accordance with the code into what is > now an "existing" system. > glc > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Greg > McGahan > Sent: Wednesday, April 25, 2007 12:20 PM > To: [email protected] > Subject: 1/2" thread - 8 K sprinklers > > 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. > > 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:Sprinklerforum- > [EMAIL PROTECTED] (Put the word unsubscribe in the subject > field) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:Sprinklerforum- > [EMAIL PROTECTED] (Put the word unsubscribe in the subject > field) > _______________________________________________ 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) _______________________________________________ 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)
