Assuming we are talking about 23.4 (yea I know - adding that addition al chapter screwed up the memory banks), slow down and look at the title of the section. Now that explains why you found nothing allowing the use of a pipe schedule? Back in ch 11, we still have th option of doing a pipe schedule or a hydraulic design for LH and OH. If the system is larger than 5,000 sf the jump to 50 psi shall we say discourages its use.
Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Apr 9, 2015, at 7:00 AM, [email protected] wrote: > > I am not seeing any allowance in 22.4 for not doing calculations on the new > system. Wording indicates that calcs are required. > > 22.4 is addressing the procedure for marrying existing systems with new > systems. So I'm not sure where you see that calcs are not required. > > Craig L. Prahl > Fire Protection Group Lead > CH2MHILL > Lockwood Greene > 1500 International Drive > Spartanburg, SC 29303 > Direct - 864.599.4102 > Fax - 864.599.8439 > CH2MHILL Extension 74102 > [email protected] > > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Tim Stone > Sent: Thursday, April 09, 2015 9:49 AM > To: [email protected] > Subject: RE: Hydraulic Calcs on an existing sprinklered building > > Craig, The existing system was hydraulically calculated at the time of > Installation. The water supply has actually improved due to new municipal > water mains. > What System piping that has been taken apart is very clean and no sign of MIC. > > Regards, > G. Tim Stone > > G. Tim Stone Consulting, LLC > NICET Level III Engineering Technician > Fire Protection Sprinkler Design > and Consulting Services > > 117 Old Stage Rd. - Essex Jct., VT. 05452 > CELL: (802) 373-0638 TEL: (802) 434-2968 Fax: (802) 434-4343 > [email protected] > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Brad Casterline > Sent: Thursday, April 09, 2015 9:42 AM > To: [email protected] > Subject: RE: Hydraulic Calcs on an existing sprinklered building > > Ohhhh-- this is what threw me: > > "The existing hydraulic pipe schedule already in place is going to be used to > extend the system into the addition." > > Brad > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Tim Stone > Sent: Thursday, April 09, 2015 8:36 AM > To: [email protected] > Subject: RE: Hydraulic Calcs on an existing sprinklered building > > Brad, I looked at that too, but in this case it is a hydraulically calculated > system already. > > Regards, > G. Tim Stone > > G. Tim Stone Consulting, LLC > NICET Level III Engineering Technician > Fire Protection Sprinkler Design > and Consulting Services > > 117 Old Stage Rd. - Essex Jct., VT. 05452 > CELL: (802) 373-0638 TEL: (802) 434-2968 Fax: (802) 434-4343 > [email protected] > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Brad Casterline > Sent: Thursday, April 09, 2015 9:26 AM > To: [email protected] > Subject: RE: Hydraulic Calcs on an existing sprinklered building > > I don't think you are missing anything in that you would not have to > calculate it but I find that in 11.2.2. > You would have to do some flow testing though to make sure of 500 GPM at the > BOR and 15 PSI at the highest, which would be the existing 4th floor. > QR vs SR is another question! > > Brad > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Vince Sabolik > Sent: Thursday, April 09, 2015 8:04 AM > To: [email protected] > Subject: Re: Hydraulic Calcs on an existing sprinklered building > > Tim -- > > If it's a new remote area, definitely. I would probably provide calcs > regardless. > > - Vince > > > On 4/9/2015 8:56 AM, Tim Stone wrote: >> Hi, >> >> >> >> I am working on an existing light hazard building that is being >> remodeled and updated. The four story building (8400SF / floor) was >> built in 1992 > and >> is equipped with a hydraulically calculated sprinkler system. The bulk >> of the sprinkler system work on this project is to relocate sprinkler >> heads > to >> new ceiling layout and relocate a few mains and branchlines to >> accommodate new HVAC. >> >> >> >> A 1700 SF. 2 story addition is being built on one side and the >> sprinkler system is to be extended to cover this new space. The >> existing hydraulic pipe schedule already in place is going to be used >> to extend the system > into >> the addition. >> >> >> >> Is it required to perform Hydraulics on this 1700SF addition? 2010 ed. >> of NFPA 13, 22.4 does not indicate that it is. >> >> >> >> Am I missing something? >> >> >> >> Thank you in advance. >> >> >> >> Regards, >> >> G. Tim Stone >> >> >> >> G. Tim Stone Consulting, LLC >> >> NICET Level III Engineering Technician >> >> Fire Protection Sprinkler Design >> >> and Consulting Services >> >> >> >> 117 Old Stage Rd. - Essex Jct., VT. 05452 >> >> CELL: (802) 373-0638 TEL: (802) 434-2968 Fax: (802) 434-4343 >> >> <mailto:[email protected]> >> [email protected] >> >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >> >> > > > -- > > West Tech Fire Protection, Inc. > 11351 Pearl Road / Strongsville, Ohio 44136 > Phone 440 238-4800 Fax 440 238-4876 Cell 440 724-7601 > _______________________________________________ > 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 > > _______________________________________________ > 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 > > _______________________________________________ > 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
