Wet blanket thought. Will FM agree that that interpretation will apply to deluge "nozzles" as wel as sprinklers? In rack sprinklers should reduce the number of sprinkler which open, but not the number of deluge nozzles.
On Tue, Aug 20, 2013 at 2:04 PM, Cahill, Christopher <[email protected]>wrote: > High piled double row rack storage with in-rack sprinklers. Per design > selected (FM) longitudinal flue heads at every upright and not to exceed > 10' o.c. This is a design that allows one not to consider the overhead > sprinklers. Long story but seemingly the best approach for a reconverted > hangar from the 1950's with unknown deluge design. > > Cantilever racks with uprights (columns) variable at 2'-8' spacing. Of > course the uprights are more like 18" steel columns with 6" flanges. Does > one put a head at every upright? Down to 2' o.c. seems a little ridiculous? > No matter where you put the head there is a large shadow on the other side > of the rack/column. I believe NFPA says locate heads 3" from upright but I > think they are talking about the little few inch wide typical rack design > not cantilever columns. Thought about solving that problem with a row down > each side of the upright but then stuck with the every upright or 10' o.c. > Anyone done a cantilever with in-racks lately? > > Chris Cahill, PE* > Senior Fire Protection Engineer > > Ed Vining 4819 John Muir Rd Martinez CA 94553 925-228-8792 Cell 925-787-0465 *Note the e-mail address change* _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
