Rick, Once the storage is over 25 ft. the "height" really doesn't matter. The roof density is determined by the distance from top level or in-racks to the top of storage and the in-rack requirement is from Figures 17.3.1.2(a) to 17.3.1.2(f) based on a level of sprinklers about every 10 ft. or two tiers.
Ron Fletcher Aero Automatic Sprinkler 21605 N. Central Ave Phoenix, AZ 85024 P: 623.580.7836 F: 623.434.3420 C: 602.763.4160 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Matsuda, Richard Sent: Monday, January 05, 2009 10:14 AM To: [email protected] Subject: RE: 1st Level of in-rack sprinklers location Ron, Let's play devils advocate and go back to the question that I asked in my first response. >>>>If your total storage arrangement is 35-feet high, do you design for the total height of 35-feet or only 30-feet high since the lower 5-feet is dead space?<<<< I don't understand your note regarding your source of ignition being a ..."hot load containing something that ignites after sitting in the rack for a few hours or days". What the h--- is this storage? Class 4 and Group A in cartons?...what is this "hot load"? And to answer Roland's question...yes, it appears that 10-feet (or close to 10-feet) between sprinklers is the intent, but 110-feet of storage height is something I cannot imagine and I would hate to err on the lenient side...so go back to the question that I asked earlier. >>>>If your total storage arrangement is 35-feet high, do you design for the total height of 35-feet or only 30-feet high since the lower 5-feet is dead space?<<<< rick p.s. Gotta run to a meeting...will have to continue this discussion later if y'all if you wish. rick -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Fletcher, Ron Sent: Monday, January 05, 2009 10:25 AM To: [email protected] Subject: RE: 1st Level of in-rack sprinklers location No one gets shot on this forum (I hope), all opinions are appreciated. To play devils advocate though what would you do if the load height were 10 ft. instead of 5? The top of the first tier would be 15 ft. off the floor. I don't agree with the "source of ignition would probably be at the floor level". I think the most likely source would be a hot load containing something that ignites after sitting in the rack for a few hours or days. Ron Fletcher Aero Automatic Sprinkler 21605 N. Central Ave Phoenix, AZ 85024 _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
