Please clarify, in one paragraph you stated the system was hydraulically calculated but in another you state something was sized by "hydraulic pipe schedule".
So is the existing system calculated or scheduled? Is the water supply exactly the same as it was when the existing system was installed? Has the pipe in the existing system ever had any internal inspections for corrosion or other buildup such as MIC? Why would you not calculate it and remove all doubt about performance and compliance? 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 8:57 AM To: [email protected] Subject: Hydraulic Calcs on an existing sprinklered building 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
