The only exception to the practice of balancing is that new single layer scheme way at the end of the in rack section of Data Sheet 8-9.
Best Bruce Verhei > On Feb 23, 2018, at 12:40, Ron Greenman <rongreen...@gmail.com> wrote: > > 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.) >> >> 23.4.2.4 Hydraulic Junction Points. >> 23.4.2.4.1 Pressures at hydraulic junction points shall balance within >> 0.5 >> psi (0.03 bar). >> 23.4.2.4.2 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:sprinklerforum-bounces@lists.firesprinkler. >> org] >> On Behalf Of Easter, Timothy M CIV NAVFAC MIDLANT, CI >> Sent: Friday, February 23, 2018 11:30 AM >> To: sprinklerforum@lists.firesprinkler.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 _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
