Don't forget the wording. System. You bringing another U/g supply, and System Riser? One Building, one system yes?
R/ Matt Matthew J. Willis Project Manager Rapid Fire Protection Inc.<http://rapidfireinc.com/> 1530 Samco Road Rapid City, SD 57702 Office-605.348.2342 Direct Line-605.593.5063 Cell-605.391.2733 Fax:-605.348.0108 [cid:[email protected]] From: Sprinklerforum [mailto:[email protected]] On Behalf Of Scott Futrell Sent: Friday, October 6, 2017 10:47 AM To: [email protected] Subject: RE: Pipe Schedule System It's simple to me Reed. I would not want the liability if the fire occurred in the pipe schedule system and that system failed to control the fire, as intended. Knowing that it doesn't work is where your liability begins, in my opinion. Scott Office: (763) 425-1001 x 2 Cell: (612) 759-5556 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Reed A. Roisum, SET Sent: Friday, October 06, 2017 11:41 AM To: [email protected]<mailto:[email protected]> Subject: Pipe Schedule System I have an existing pipe schedule system in a partially sprinklered building...installed in 1969. I am doing a life safety analysis that includes budget estimating to provide new fire alarm and sprinklers. The existing pipe schedule portion of the system is considerably higher in elevation and remote. It doesn't work hydraulically with the city supply. Even when I replace the system with larger pipe I can't get the calc to work. In order to install a new system or keep the existing system in place and have it hydraulically "work" we will need to install a fire pump. My problem is, the owner may decide to just upgrade the fire alarm system and not sprinkler the building if we need a fire pump as the sprinkler retrofit is voluntary. My question for the Forum is, can an existing pipe schedule system be left in place even if we retrofit the rest of the building and hydraulically prove the rest of the building? NFPA 13, 2013 edition... 23.5 Pipe Schedules Pipe schedules shall not be used, except in existing systems and in new systems or extensions to existing systems described in Chapter 11. Water supplies shall conform to 11.2.2. If I can meet the water supply requirements of Table 11.2.2.1 for Ordinary Hazard, which is a minimum pressure of 20 psi flowing 850 gpm then is the pipe schedule permitted? It appears as though I am out of luck because of 11.2.2.6.1 Residual Pressure... The residual pressure requirement of Table 11.2.2.1 shall be met at the elevation of the highest sprinkler. The main reason I can't get the calc to work is because of elevation. I would assume the AHJ would be willing to work with us if the choices are... 1. No upgrade to the sprinkler system, or 2. A fully sprinklered building with 2000 sq ft that is pipe schedule and doesn't work hydraulically. Any insight or ideas will be appreciated. Reed Reed A. Roisum, SET | Karges-Faulconbridge, Inc. | Senior Fire Protection Designer | Fargo, ND | direct: 701.552.9903 | mobile: 701.388.1352 | KFIengineers.com<http://www.kfiengineers.com> ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________
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