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 Burns & McDonnell 8201 Norman Center Drive Bloomington, MN 55437 Phone: 952.656.3652 Fax: 952.229.2923 [email protected]<mailto:[email protected]> www.burnsmcd.com<http://www.burnsmcd.com/> Proud to be one of FORTUNE's 100 Best Companies to Work For *Registered in: MN _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
