WoW! If they are fixed in place and you have to sprinkler under you will need about what, (12) heads/table, and baffles; with 6 or 8 inches from bottom of framing to floor the floor is an obstruction to the pattern developing for uniform density, unless the spacing is very close ;) . Maybe some day the book will say unless the depth of the space exceeds max deflector distance, heads are not required. You cold def use QR Reduction though (if you use QR heads and wet pipe, but the fuel load itself will also be an obstruction!
never mind me though as usual-- i'm just geeking here -----Original Message----- From: Johnson, Duane (NIH/OD/ORS) [C] [mailto:[email protected]] Sent: Thursday, December 12, 2013 3:04 PM To: [email protected] Subject: RE: obstruction vs concealed space. 8.5.5.3.2 Sprinklers shall not be required under obstructions that are not fixed in place, such as conference tables. Duane Johnson, PE Program Manager Division of the Fire Marshal (Contractor) Office of Research Services National Institutes of Health 301-496-0487 "Protecting Science - One Sprinkler at a Time" -----Original Message----- From: Todd - Work [mailto:[email protected]] Sent: Thursday, December 12, 2013 4:02 PM To: [email protected] Subject: Re: obstruction vs concealed space. NFPA 13 (2002) section 8.5.5.3.1 and equivalent sections of subsequent editions. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT www.fpdc.com 860-535-2080 (ofc) > On Dec 12, 2013, at 3:47 PM, Steven Scandaliato <[email protected]> wrote: > > What is making you feel you need to put sprinklers under tables that are 16" > off the floor? Or under "normal" circumstances? > > Steven Scandaliato, SET CFPS > 520.971.2322 Cell > Skype: steven.scandaliato > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Todd - Work > Sent: Thursday, December 12, 2013 2:19 PM > To: [email protected] > Subject: Re: obstruction vs concealed space. > > Growing tables in an agricultural facility > > Todd G Williams, PE > Fire Protection Design/Consulting > Stonington, CT > www.fpdc.com > 860-535-2080 (ofc) > >> On Dec 12, 2013, at 2:57 PM, <[email protected]> wrote: >> >> What kind of "tables", what kind of environment? >> >> Craig L. Prahl, CET >> Fire Protection Group Lead >> CH2MHILL >> Lockwood Greene >> 1500 International Drive >> Spartanburg, SC 29304-0491 >> Direct - 864.599.4102 >> Fax - 864.599.8439 >> CH2MHILL Extension 74102 >> [email protected] >> >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of >> Todd - Work >> Sent: Thursday, December 12, 2013 2:34 PM >> To: [email protected] >> Subject: obstruction vs concealed space. >> >> I am working on a project where they are going to have 9 ft x 20 ft >> tables > located 16" off the floor. Not sure if the tables will be built with > 2x8 or > 2x10 framing. Under normal circumstances, we would need to have > sprinklers installed under the tables. However, if the distance from > the bottom of the joist to the floor is 6" or less, could it be considered a "concealed space" > and sprinkler be eliminated? I would assume if those sprinklers were > eliminated, the design area for the ceiling would increase to 3000 sqft. >> >> Todd G Williams, PE >> Fire Protection Design/Consulting >> Stonington, CT >> www.fpdc.com >> 860-535-2080 (ofc) >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >> l er.org _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >> l >> er.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.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
