This does however beg the question of whether or not we really want to control or suppress a fire in this facility.
In Memory of George Church and Chemotherapy Patients Everywhere, SML -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of rongreenman . Sent: Wednesday, January 08, 2014 1:47 PM To: [email protected] Subject: Re: concealed space definition - part deux Even better. Pretty humid environment. On Wed, Jan 8, 2014 at 1:46 PM, Todd - Work <[email protected]> wrote: > Actually they are going to be growing medical marijuana. > > Todd G Williams, PE > Fire Protection Design/Consulting > Stonington, CT > www.fpdc.com > 860-535-2080 (ofc) > > > On Jan 8, 2014, at 4:33 PM, "rongreenman ." <[email protected]> > wrote: > > > > Sounds like a growing mushroom house. > > > > > >> On Wed, Jan 8, 2014 at 9:30 AM, Todd - Work <[email protected]> wrote: > >> > >> Each 40 ft x 64 ft room in this area has six 9 ft x 20 ft tables, > spaced 1 > >> ft apart in one direction and 3 ft apart in the other. Agricultural > >> occupancy so OH2 design. Tables are not skirted. In addition to > >> wood construction, there will be plastic sheeting and plastic > >> tubing under > the > >> table. (I am using the term "table" because that is what they call > them). > >> It will be a wet environment by nature of the occupancy. > >> > >> One interesting semantic note is that 11.2.3.1.8 (3), which is the > >> 3000 sqft requirement, references 8.14.6, which is the platform > >> requirement > also > >> references combustible concealed spaces. But 8.14.6 only references > >> combustible spaces. Nothing about them being concealed > >> > >> Looking at this from a practical perspective (think like fire), if > >> a > fire > >> did start under a table, it could have significant time to develop > before > >> being detected. There may not be enough heat generated to activate > >> a sprinkler until after it is well developed. Perhaps not until > >> flames actually shoot up around the edge of the table. If flames > >> shoot up > around > >> more than one side of the table (possible in a 9x20 table), then a > >> lot > of > >> sprinklers over a fairly large area could open. More than would be > included > >> in a 1500 sqft area? Potentially. This is where my thought for the > >> 3000 sqft area comes from. (FWIW, EH2 occupancy description also > >> references shielded fires). > >> > >> As for liability, the nature of our society is that we need to > >> consider this as well as the technical aspect of our job. > >> > >> > >> Todd G Williams, PE > >> Fire Protection Design/Consulting > >> Stonington, CT > >> www.fpdc.com > >> 860-535-2080 (ofc) > >> > >>> On Jan 8, 2014, at 11:23 AM, "Brad Casterline" < > [email protected]> > >> wrote: > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) A problem well stated is a problem half solved. -Charles F. Kettering, inventor and engineer (1876-1958) _______________________________________________ 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
