The characteristics of the water supply would be the same at the point of connection as the test hydrant assuming elevation is the same, right? The AHJ quoted the same section and is stating that the characteristics are not the same at the point of connection.
I did order the book Steve has suggested. We'll see if that sways either of our interpretations. NFPA 13 (2010) - 22.4.1.5 Hydraulic calculations shall extend to the effective point of the water supply where the characteristics of the water supply are known. TAYLOR SCHUMACHER, CET Security Fire Sprinkler P 320.656.0847 | F 320.656.0312 | E [email protected] From: Sprinklerforum [mailto:[email protected]] On Behalf Of Eric V. Tysinger Sent: Wednesday, May 17, 2017 7:31 AM To: [email protected] Subject: RE: Circulating Fire Main Calculations NFPA 13, 2010, section 22.4.1.5 also states hydraulic calcs shall extend to the effective point of the water supply.... It doesn't really address where that "effective point" is or should be, but it backs up what Steve and Travis said. Eric V. Tysinger Designer Wiginton Fire Systems - Miami, FL Email: [email protected]<mailto:[email protected]> Main: 305-888-2402 Direct: 305-830-0490 Fax: 305-888-3804 Mobile: 239-633-9703 Confidentiality Notice: This e-mail message, including any attachments, is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Tuesday, May 16, 2017 5:46 PM To: [email protected]<mailto:[email protected]> Subject: RE: Circulating Fire Main Calculations And to drive that home, I would refer interested users of the standards to the book, "Sprinkler Hydraulics" by Harold Waas, Jr. In the chapter titled, "Relating Hydraulic Calculations to the Water Supply", Waas discusses and offers diagrams on the "effective point of a hydrant flow test". There's a very helpful figure on Page 61 of the first edition. Steve L. Geekin' Like Cecil From: Sprinklerforum [mailto:[email protected]] On Behalf Of Travis Mack, SET Sent: Monday, May 15, 2017 6:38 PM To: [email protected]<mailto:[email protected]> Subject: Re: Circulating Fire Main Calculations As long as you have a circulating main, I just always use the point of connection to the circulating main as the source point. Travis Mack, SET MFP Design, LLC 2508 E Lodgepole Drive Gilbert, AZ 85298 480-505-9271 fax: 866-430-6107 email:[email protected]<mailto:email:[email protected]> http://www.mfpdesign.com https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to us via: https://www.hightail.com/u/MFPDesign LinkedIn: https://www.linkedin.com/in/travismack On 5/15/2017 3:17 PM, Taylor Schumacher wrote: When calculating through the fire main supply line to the city water main in the street. Is it necessary to calculate back to the test hydrant if the city water main is a circulating main? Or, does NFPA allow calculating to the point where the fire line connects to the city water main? TAYLOR SCHUMACHER, CET Security Fire Sprinkler P 320.656.0847 | F 320.656.0312 | E [email protected]<mailto:[email protected]> _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org ________________________________ [AVG logo]<http://www.avg.com/internet-security> This email has been checked for viruses by AVG antivirus software. www.avg.com<http://www.avg.com/internet-security>
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