Not enough info. What is being stored? Sheets or pallets? What size of cantilever arms? Total depth of racks etc?
Russell Gregory Christchurch, New Zealand e-mail [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Cahill, Christopher Sent: Wednesday, 21 August 2013 12:18 PM To: [email protected] Subject: Re: Cantilever Racks I appreciate the thought. Its the design with barriers within the rack and at the top. So a little less exposure to the overhead. The deluge activation is also about 40' above the top of rack so lesser chance of exposure to overhead. And finally future project in next couple years to convert deluge to something else making the issue moot. As I said there is a lot to this story. Chris Cahill Fire Protection Engineer Burns & McDonnell 952-656-3652 [email protected] Ed Vining wrote: 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
