If the existing system is designed for ordinary hazard, it's likely the sprinkler spacing is something greater than 100 sf. Storage densities at or greater than .25 gpm/sf require 100 sf max spacing. Not a deal killer, but you'd need to discuss it with the AHJ.
Ed Kramer Lawrence, KS > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Brian Harris > Sent: Monday, June 24, 2013 3:04 PM > To: [email protected] > Subject: RE: Proposing changes to existing system for new storage > criteria > > Great point Mark, I never noticed that! > > Brian Harris, CET > BVS Systems Inc. > bvssytemsinc.com > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > [email protected] > Sent: Monday, June 24, 2013 4:00 PM > To: [email protected] > Subject: RE: Proposing changes to existing system for new storage > criteria > > I believe Central\Tyco still offers a 1/2" thread 17/32 orifice head. > That will get you a 30% increase in flow on the same pressure. > Mark at Aero > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Brian Harris > Sent: Monday, June 24, 2013 11:06 AM > To: [email protected] > Subject: RE: Proposing changes to existing system for new storage > criteria > > I also considered the possibility of using a higher K factor head at the > ceiling but all the outlets are 1/2", using mechanical tee's would be > quite labor intensive. My suggestion of adding Rack Sprinklers seemed > like the most cost effective way of bringing the current system up to > code, hence the reason for my post. Just looking for other ideas/ > options, thanks. > > Brian Harris, CET > BVS Systems Inc. > bvssytemsinc.com > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > [email protected] > Sent: Monday, June 24, 2013 1:22 PM > To: [email protected] > Subject: Re: Proposing changes to existing system for new storage > criteria > > An adequate sprinkler system is at the core of high-piled combustible > storage protection. But you, or someone else, needs to start with the > fire code, and then work towards 13. Someone needs to determine all the > requirements. > Inside 13, I'd never automatically say in-rack sprinklers are required. > I'd go start tracking down what kind of water is available in the main, > and while that is in progress, go back to commodity classification, see > what a ceiling only design would require. I'd also talk with business. > Do they plan on going higher? This is not a project that you can do at > third hand. It'd be like using a Ouija ( sp ?) Board. Correction from > down to 15' is considerable. Assuming you can apply Fig. 16.2.1.3.4.1 > design density is reduced 40% in most cases. Can an acceptable design > density be arrived at by using heads with a higher K-factor? If so, this > is typically the preferred route. > It is also easy to forget to consider whether column protection is > required. > > bv > > ----- Original Message ----- > From: "Brian Harris" < BHarris @ bvssystemsinc .com> > To: sprinklerforum @lists. firesprinkler .org > Sent: Monday, June 24, 2013 8:51:54 AM > Subject: Proposing changes to existing system for new storage criteria > > I got a call the other day form a local company that bought a cold dark > shell approximately 4 years ago and has been using part of it as a > storage warehouse for miscellaneous items similar to what you would find > at any store checkout counter. Lighters, aspirin, pens, various odds and > ends, and they are stored on racks, mostly in cardboard boxes, with the > storage as high as 15' in some areas. The other day the AHJ stopped in > and recommended they cut slats in the wooden shelving to allow the > overhead system to reach the bottom shelves. At first I thought this > might work but turns out the overhead system was only designed for AH-2 > using standard 5.6k heads so now it looks like they're gonna definitely > need rack protection. Any advice or potential problems anyone can see? > > Brian Harris, CET > BVS Systems Inc. > Sprinkler Division > bvssystemsinc .com< http :// bvssystemsinc .com/> > Phone: 704.896.9989 > Fax: 704.896.1935 > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum @lists. firesprinkler .org 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 > > > _______________________________________________ > 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
