This GC may also be getting a tit near a wringer on some other things regarding space separation above the ceiling and having a common return plenum where smoke can travel from one space to the next, especially in a day care center that may be subject to state inspection by someone looking out for more than the average wood residential construction rules.
Allan Seidel St. Louis, MO On Aug 5, 2013, at 10:24 AM, "Johnson, Duane (NIH/OD/ORS) [C]" <[email protected]> wrote: > Plenums are covered in NFPA 90A section 4-3.11 (2012). Sprinklers are not > required, but everything in the space must be noncombustible, including any > electrical wiring, cables, and sprinkler pipe serving other areas... > > For sprinklers: > 4.3.11.2.6.3 Nonmetallic fire sprinkler piping shall be listed as having a > maximum peak optical density of 0.5 or less, an average optical density of > 0.15 or less, and a maximum flame spread distance of 1.5 m (5 ft) or less > when tested in accordance with ANSI/UL 1887, Standard for Safety Fire Test of > Plastic Sprinkler Pipe for Visible Flame and Smoke Characteristics. > > 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: Brian Harris [mailto:[email protected]] > Sent: Monday, August 05, 2013 11:00 AM > To: [email protected] > Subject: RE: Special Situations (8.15) > > 10-4, I'll suggest the plenum be enclosed with type "x" in order to apply > 8:15. For my own future reference is standard drywall considered limited > combustible in any case? > > Brian Harris, CET > BVS Systems Inc. > bvssytemsinc.com > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Ron > Greenman > Sent: Monday, August 05, 2013 10:54 AM > To: [email protected] > Subject: Re: Special Situations (8.15) > > Type X > > > On Mon, Aug 5, 2013 at 7:41 AM, Brian Harris <[email protected]>wrote: > >> I guess the big question then is standard 5/8" GWB considered limited >> or non-combustible. If memory serves me correct I believe it has a >> 1hour fire rating? >> >> Brian Harris, CET >> BVS Systems Inc. >> bvssytemsinc.com >> >> -----Original Message----- >> From: [email protected] [mailto: >> [email protected]] On Behalf Of Reed A. >> Roisum, C.E.T. >> Sent: Monday, August 05, 2013 10:38 AM >> To: [email protected] >> Subject: RE: Special Situations (8.15) >> >> Correct. If indeed the plenum created is a noncombustible concealed space. >> >> Reed A. Roisum, C.E.T. | Karges-Faulconbridge, Inc. | Fire Protection >> Designer | Fargo, ND | direct: 701.552.9903 | mobile: 701.388.1352 | >> http://www.kfiengineers.com >> >> -----Original Message----- >> From: [email protected] [mailto: >> [email protected]] On Behalf Of Brian >> Harris >> Sent: Monday, August 05, 2013 9:27 AM >> To: [email protected] >> Subject: Special Situations (8.15) >> >> All- >> I recently finished a design for a wood structure day care facility, >> (1) level of attic heads and (1) level of ceiling heads. The GC has >> now decided in an effort to save money on the HVAC to attach drywall >> to the bottom of the wood joist and use the area between this drywall >> and the suspended ceiling as a return air plenum. If I'm reading >> 8.1.1.2.1 & 8.15.1.2.2 correctly I do not need to add a 3rd level of >> protection in this "plenum" >> area correct? >> >> Brian Harris, CET >> BVS Systems Inc. >> Sprinkler Division >> bvssystemsinc.com<http://bvssystemsinc.com/> >> Phone: 704.896.9989 >> Fax: 704.896.1935 >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> er.org >> >> ______________________________________________________________________ >> This email has been scanned by the Symantec Email Security.cloud service. >> For more information please visit >> http://www.symanteccloud.com__________________________________________ >> ____________________________ >> _______________________________________________ >> 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 >> > > > > -- > 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) > _______________________________________________ > 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
