NFPA 13, 2016 ed. States: 23.4.4.2.5 Where the total design discharge from these oper-
ating sprinklers is less than the minimum required discharge determined by multiplying the required design density times the required minimum design area, an additional flow shall be added at the point of connection of the branch line to the cross main furthest from the source to increase the overall demand, not including hose stream allowance, to the mini- mum required discharge. This is kinda gray to me. Does it mean that if I have a light hazard area that is only 884 sf (offices in a shop) and the area modifier being applied will allow for a 900 sf area, then I would need a minimum discharge of 90 gpm over the entire area? Then, if my calculations bare out 92 gpm nothing else needs done, but if they came out to 84 gpm an additional flow of 6 gpm would need to be added? Sorry about the run on sentences, just confused. Thank you, Bob Knight, CET III Fire by Knight, LLC 208-318-3057 FBK-LOGO-EMAIL
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