I've seen in-racks that seem to be essentially a separate system as they come off a common manifold and look like risers, and still calculate both back to the manifold, adjust there and the calc out to the source.
Ron Greenman rongreen...@gmail.com 253.576.9700 The Universe is monstrously indifferent to the presence of man. -Werner Herzog, screenwriter, film director, author, actor and opera director (1942-) On Fri, Feb 23, 2018 at 10:44 AM, Bob <b...@firebyknight.com> wrote: > Timothy, > The in-rack demand is added to the ceiling demand at the point of > connection > to the system. Also, the pressure is to be balanced to within .5 psi. > > From the 2013 ed.: > 23.8.2 Water demand of sprinklers installed in racks shall be added to > ceiling sprinkler water demand over the same protected area at the point of > connection. > 23.8.3 The demand shall be balanced to the higher pressure. > 23.8.4 Water demand of sprinklers installed in racks or water curtains > shall be added to the ceiling sprinkler water demand > at the point of connection. Demands shall be balanced to the higher > pressure. (See Chapter 8.) > > 18.104.22.168 Hydraulic Junction Points. > 22.214.171.124.1 Pressures at hydraulic junction points shall balance within > 0.5 > psi (0.03 bar). > 126.96.36.199.2 The highest pressure at the junction point, and the total > flows > as adjusted, shall be carried into the calculations. > > > Thank you, > > Bob Knight, CET III > 208-318-3057 > > -----Original Message----- > From: Sprinklerforum [mailto:email@example.com. > org] > On Behalf Of Easter, Timothy M CIV NAVFAC MIDLANT, CI > Sent: Friday, February 23, 2018 11:30 AM > To: firstname.lastname@example.org > Subject: inrack sprinkler question > > Does the in-rack sprinkler system need to be combined with the ceiling > sprinkler system, for hydraulic calcs? Can anyone cite reference that > requires this? > > V/R, > Timothy M. Easter, P.E. > NAVFAC Mid-Atlantic > Capital Improvements > Fire Protection Engineer > Comm: (757) 341 - 0130 / DSN 341 - 0130 > Office Hours: 0800 - 1730 > RDO: 2nd Friday > > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.firesprinkler.org/private.cgi/sprinklerforum-firesprinkler.org/attachments/20180223/addedec7/attachment.html> _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org