Reed- Yes, the total inside + outside hose allowance = 250.
Brian Harris, CET BVS Systems Inc. bvssytemsinc.com<http://bvssystemsinc.com/> From: Sprinklerforum [mailto:[email protected]] On Behalf Of Reed A. Roisum, SET Sent: Tuesday, August 02, 2016 11:31 AM To: [email protected] Subject: Stage Calc Hose Allowance When taking the IBC exception for the required Class III wet standpipe on a stage of 1000+ sq ft and installing the 1 ½" hose connection in accordance with NFPA 13, do you include an additional hose allowance on the sprinkler calc? Stage is OH2 so I have a 250 gpm hose stream requirement currently added at the connection to the underground city water main (effective point). To be technically correct do I change that to 200 outside hose at the effective point and 50 gpm inside hose at the connection of the 1 ½" hose to the sprinkler system? Below are some of what I think are relevant code and standard references... IBC 2009 [F] 905.3.4 Stages. Stages greater than 1,000 square feet in area shall be equipped with a Class III wet standpipe system with 1 1/2-inch and 2 1/2-inch hose connections on each side of the stage. Exception: Where the building or area is equipped throughout with an automatic sprinkler system, a 1 1/2-inch hose connection shall be installed in accordance with NFPA 13 or in accordance with NFPA 14 for Class II or III standpipes. [F] 905.3.4.1 Hose and cabinet. The 1 1/2-inch hose connections shall be equipped with sufficient lengths of 1 1/2-inch hose to provide fire protection for the stage area. Hose connections shall be equipped with an approved adjustable fog nozzle and be mounted in a cabinet or on a rack. NFPA 13, 2010 edition Chapter 11 Design Approaches 11.1 General. The requirements of Section 11.1 shall apply to all sprinkler systems unless modified by a specific section of Chapter 11 or Chapter 12. 11.1.6 Hose Allowance. 11.1.6.4* Water allowance for outside hose shall be added to the sprinkler requirement at the connection to the city main or a private fire hydrant, whichever is closer to the system riser. 11.1.6.5 Where inside hose connections are planned or are required, the following shall apply: (1) A total water allowance of 50 gpm (189 L/min) for a single hose connection installation shall be added to the sprinkler requirements. (2) A total water allowance of 100 gpm (379 L/min) for a multiple hose connection installation shall be added to the sprinkler requirements. (3) The water allowance shall be added in 50 gpm (189 L/min) increments beginning at the most remote hose connection, with each increment added at the pressure required by the sprinkler system design at that point. [cid:[email protected]] Thank you. Reed Roisum 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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