This provision is for a room serving no more than 6 sprinklers and comes from:
NFPA 101:9.7.1.2 [2012] Sprinkler piping serving not more than six sprinklers for any isolated hazardous area shall be permitted to be connected directly to a domestic water supply system having a capacity sufficient to provide 0.15 gpm/ft2 (6.1 mm/min) throughout the entire enclosed area. An indicating shutoff valve, supervised in accordance with 9.7.2 or NFPA 13, Standard for the Installation of Sprinkler Systems, shall be installed in an accessible, visible location between the sprinklers and the connection to the domestic water supply. The handbook states that each room (of 6 sprinklers or less) can be calculated separately. Duane Johnson -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Todd Williams Sent: Sunday, August 24, 2014 1:21 PM To: [email protected] Subject: Re: limited area system calcs The issue is that they have to be calculated to a .15 density and we have a 2" supply. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 www.fpdc.com > On Aug 24, 2014, at 11:46 AM, Brad Casterline <[email protected]> wrote: > > Ok thanks. Might as well just calc them all. How demanding can 3 to 6 > sprinklers be anyhow? > >> On Aug 24, 2014, at 10:20 AM, Todd - Work <[email protected]> wrote: >> >> This is a fairly ornate house from the late 1800s that is being converted to >> a B&B. The CT FIre Safety Code eliminates most requirements for sprinklers >> in B&Bs (good lobby effort), but since they want to use the 3rd floor with >> the open stair tower, some additional protection is being required. >> >> Todd G Williams, PE >> Fire Protection Design/Consulting >> Stonington, CT >> www.fpdc.com >> 860-535-2080 (ofc) >> >>> On Aug 24, 2014, at 6:50 AM, Brad Casterline <[email protected]> >>> wrote: >>> >>> I would I suppose Todd, because I can, but I am curious; >>> >>> This is a new installation in a building with a stair tower, yet it is a >>> limited Area System? >>> >>> If it is not too proprietary, will you paint a bigger picture? >>> >>> Thanks, Brad. >>> >>> >>> >>>> On Aug 20, 2014, at 7:30 PM, Todd - Work <[email protected]> wrote: >>>> >>>> I am working on a project where they are installing a limited area system >>>> per NFPA 101. The section calls for all of the heads within the >>>> compartment to be included in the calculation. Does that apply if the >>>> compartment is a stair tower and there are sprinklers on multiple levels? >>>> Would you calculate all heads within the tower? >>>> >>>> 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-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 _______________________________________________ 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
