Put ESFR's under the catwalk and include two (2) additional ESFR's in the calc's total of fourteen heads flowing. Just like it's an obstruction.
Mike > From: [email protected] > To: [email protected] > Subject: RE: ESFR Sprinklers and covered catwalks > Date: Fri, 30 Oct 2015 18:16:25 +0000 > > The situation I was dealing with is not a rack. It is a shelf - solid back, > solid shelves, solid ends. It is not likely to get a full scale test for a > not-all-that-common setup. Or maybe it is more common than I think. > > John F. Hoffman, PE* \ Burns & McDonnell > Senior Fire Protection Engineer > O 816-349-6759 \ M 816-255-4102 > [email protected] \ burnsmcd.com > 9400 Ward Parkway \ Kansas City, MO 64114 > > Proud to be one of FORTUNE's 100 Best Companies to Work For > Please consider the environment before printing this email. > *Registered in: MO > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Scott Futrell > Sent: Thursday, October 29, 2015 4:36 PM > To: [email protected] > Subject: RE: ESFR Sprinklers and covered catwalks > > Hmmm...John that is interesting direction you are giving there. > > Do you have NFPA 13 or full-scale testing to support the "ESFR could spray > below the catwalk" comment? Or, that OH2 below the catwalk will not allow the > fire to grow horizontally along the racking overwhelming the ESFR above? > > If the catwalk doesn't extend through the rack how can you protect a 30' high > (or pick a height) rack storage with QR sprinklers below the catwalk level > and ESFR above the catwalk level when it's all the same rack storage from the > ground up with flue spaces open and continuous to the roof. I must be > missing something here. > > I assume the direction of the catwalk would/could enter into the scenario, > but I would like to see your support for the comments you've made here, and > if you have that support great! > > Scott > > Office: (763) 425-1001 x 2 > Cell: (612) 759-5556 > > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of John F Hoffman > Sent: Thursday, October 29, 2015 4:14 PM > To: [email protected] > Subject: RE: ESFR Sprinklers and covered catwalks > > If the roof-level ESFR could spray below the catwalk (assuming open grating) > you would not need the sprinklers under the catwalk. But, as mentioned > before, you are forced to put a cover on the grating so should be able to > install whatever sprinklers can deal with the hazard under the grating. > > Class IV shelf storage up to 12 feet high can be protected with OH2. Even > plastic shelf storage only requires EH1 or EH2 depending on height. ESFR is > overkill. > > John F. Hoffman, PE* \ Burns & McDonnell Senior Fire Protection Engineer O > 816-349-6759 \ M 816-255-4102 [email protected] \ burnsmcd.com > 9400 Ward Parkway \ Kansas City, MO 64114 > > Proud to be one of FORTUNE's 100 Best Companies to Work For Please consider > the environment before printing this email. > *Registered in: MO > > > > > > _______________________________________________ > 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
