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* Senior Fire Protection Engineer, Aviation & Facilities Group Burns & McDonnell 8201 Norman Center Drive Bloomington, MN 55437 Phone: 952.656.3652 Fax: 952.229.2923 [email protected] www.burnsmcd.com Proud to be one of FORTUNE's 100 Best Companies to Work For *Registered in: MN -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Gregory Lindholm Sent: Friday, August 31, 2012 11:56 AM To: SprinklerFORUM Subject: Atic Remote Area We have a project where we are having a discussion about how many heads we need to flow. There are a couple of different scenarios: (NFPA #13-2010) 1) New wood truss attic overframing onto an existing shingled roof. 4/12 pitch. Normally 2,535 sq. ft. for dry system & roof pitch. One area of a new attic is 1,200 sq. ft. Would we have to include 1,335 sq. ft. into the existing attic if there are no openings between them? If not, where does it say so. 2) 2,260 sq. ft. new attic. They will be sheet rocking the bottoms of the trusses, and one side of a truss to make it into two 1,130 sq. ft. areas. Then basically the same question as above, do we design for !,130 sq. ft. flowing, or 2,260 sq. ft. I believe that we would flow each small area, but I could not find it. Greg Lindholm -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120831/4ac24e51/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
