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
