We just protected an OH2 store with a #22 tank and a pair of single phase #20 pumps when 3 phase wasn't available. Cheaper than a pressure tank(s). Glc
Sent from my iPhone On Aug 31, 2012, at 3:43 PM, "Cahill, Christopher" <ccah...@burnsmcd.com> wrote: > Well I don't know how you get 30 minutes if only rocked on one side per: > 11.2.3.3.3 To utilize the room design method, all rooms shall be enclosed > with walls having a fire-resistance rating equal to the water supply duration > indicated in Table 11.2.3.1.2. > > And in #2 - 2,260 still isn't enough unless you meet the same rating issue > wherever an additional 275 sq.ft. might be. > > I have used room design in these cases a couple times particularly where the > water supply was an issue. Imagine no three phase power and no water. > Cutting a small attic in half saves the day with a single phase pump and > small tank. > > Chris Cahill, PE* > Senior Fire Protection Engineer, Aviation & Facilities Group > Burns & McDonnell > 8201 Norman Center Drive > Bloomington, MN 55437 > Phone: 952.656.3652 > Fax: 952.229.2923 > ccah...@burnsmcd.com > www.burnsmcd.com > > Proud to be one of FORTUNE's 100 Best Companies to Work For > *Registered in: MN > > > > > > -----Original Message----- > From: sprinklerforum-boun...@firesprinkler.org > [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Gregory > Lindholm > Sent: Friday, August 31, 2012 1:41 PM > To: SprinklerFORUM > Subject: RE: Attic Remote Area > > > Yes, I was thinking about using the room design method. In this instance, > there would be not reasonable was to remove the sheet rock in example #1, and > pretty tough to do anything in example #2. > > Is there any reason not to use the room design method here? > > Greg Lindholm > > >> From: rhugg...@firesprinkler.org >> To: sprinklerforum@firesprinkler.org >> Subject: Re: Attic Remote Area >> Date: Fri, 31 Aug 2012 11:26:16 -0700 >> >> concur, we ignore even rated walls unless using room design method. >> >> There is new guidance on how to address small subsystems (such as dry- >> pipe on loading docks or preaction in computer room) in the 2013 >> edition of NFPA 13. This use to be a particularly tricky issue when >> applying logic for an answer when the sub-system like a loading dock >> uses spray sprinklers and the adjacent warehouse system uses ESFR. >> See the June issue of Sprinkler Age for more information. >> >> Roland >> >> >> >> On Aug 31, 2012, at 10:57 AM, Cahill, Christopher wrote: >> >>> 1. Assuming they are the same system. Yes, where does it say you can >>> reduce the area below 2,535? Getting the total area is almost a >>> Cardinal rule. Only way out is room design method if it applies. >>> But that entails being reasonably sure the required walls will >>> remain after the legendary cable guy comes through. One reason the >>> room design method is flawed, owners can take down walls without >>> even thinking sprinklers (as long as they are 6' apart). I guarantee >>> during inspection no one knows if it room design or not. >>> I know we can't plan for the future. >>> 2. Same answer. >>> >>> Chris Cahill, PE* >> >> -------------- next part -------------- An HTML attachment was >> scrubbed... >> URL: >> <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/atta >> chments/20120831/1ff2322f/attachment.html> >> _______________________________________________ >> Sprinklerforum mailing list >> Sprinklerforum@firesprinkler.org >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120831/aaf31bdb/attachment.html> > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@firesprinkler.org > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@firesprinkler.org > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
