Craig, We're trying not to rework the existing overhead system. The owner wants to keep the ESFR systems in case they want to convert these areas back to storage.
Todd, cable trays are addressed in 2-0 as non-solid, non-continuous, and/or non-flat obstructions over two feet wide and up to 10 feet wide. I don't know why but it seems like nobody on the east coast wants to talk to their FM Global rep, or let their sprinkler contractor talk to him. I mean, I know why, but its so short-sighted. Benjamin Young On Thu, Jun 11, 2015 at 9:00 AM, <[email protected]> wrote: > If you're going to rework the existing ESFR system and respace the > sprinklers why not just change them out to a non-ESFR sprinkler? > > Craig L. Prahl > Fire Protection Group Lead > CH2MHILL > Lockwood Greene > 1500 International Drive > Spartanburg, SC 29303 > Direct - 864.599.4102 > Fax - 864.599.8439 > CH2MHILL Extension 74102 > [email protected] > > On Thu, Jun 11, 2015 at 6:57 AM, [email protected] > <[email protected]> wrote: > I'm did the research yesterday in FM 2-0 and in the AFSA informal interps, > but I wanted to make sure I'm not missing something here... > > Can I get a confirmation that you are still required to meet obstruction > criteria for ESFR (storage) sprinkler heads even when they're being used to > protect a non-storage occupancy? > > I see nothing in 2-0 about the use of storage sprinkler in non-storage > occupancies, but I know that NFPA 13 covers this. I think that the listing > criteria of the ESFR heads is what drives the obstruction rules, so these > must be complied with to use the heads for say, a manufacturing occupancy. > > Backstory: we have a customer that is converting rack storage to > manufacturing, and they're putting in a lot of cable trays for the > machinery. Wide cable trays, double stacked cable trays, offset trays, etc. > Nothing over 10 feet wide, but very full cable trays that almost always are > over 2 feet wide. The building is about 24' high, and the trays will be > down at 12' so plenty of clear space. > > The customer is FM insured, so we're giving them the option to either > install barriers under the trays and space the roof-level sprinklers every > 8 ft or to leave the barriers out and put the roof-level heads under the > trays every 4 ft (and also following the maximum square footage allowances > in FM 2-0 of course). > > Before I deliver this great news, I just wanted to make sure I didn't miss > something in my reading of 2-0. > > I'm guessing, as well, that I can simply ignore the obstruction rules > relating to the placement of obstructions over flue spaces and other > storage-specific items. > > Thanks in advance for any assistance with this! > > Benjamin Young > _______________________________________________ > 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
