And once in a while, logic actually applies. You add it to the main directly at he point of connection for the branch line feeding the area of interest. The text is singular but it could be more than one branch line. The furthest point is the UPSTREAM side of the remote area. This way the upstream mains are subjected to the additional friction loss.
Also worth noting, this is the only place we ignore overage generated from actual calculations when addressing water supplies. I attempted a similar approach for sizing tanks and after the stunned silence ended, the committee burned me in effigy. NFPA caveat - just an opining committee member. Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On May 19, 2016, at 5:58 AM, Ben Young <[email protected]> wrote: > > I'm really liking the clarity provided by 23.4.4.1.1.4 and .5 in the 2013 > edition of NFPA 13 > (its 23.4.4.2.4 for those using the 2016 ed) > > But I not sure where exactly they're telling me to add the extra flow. The > code says it shall be added at the point of connection of the branch line to > the cross main furthest from the source... > > I'm assuming that would be the branch line connection to the cross main that > furthest from the source, but still inside the remote area, correct? > > So my calc is for an OH1 kitchen in an otherwise light hazard building, but > the kitchen is in the middle of the pipe run so I have branch line to cross > main connections downstream of my remote area. > > A literal reading of this section would have me putting this tie-in point > maybe 100 feet past where my remote area ends, but that doesn't seem logical > to me. > > What do you think? > > Benjamin Young > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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