We are talking about a residential occupancy still. Sent from my iPhone
On Jul 17, 2009, at 5:27 AM, <[email protected]> wrote: > Are we still talking about a residential occupancy? > > Lamar Vaughn > Vaughn & Company > > ---- Damien Shannon <[email protected]> wrote: >> My understanding would be: >> NFPA 13, 2007, 11.2.3.3.5 (2) would allow 8' wide with a 8" lintel >> for light >> hazard Room design to be considered an unprotected opening. i.e. >> you could >> still use room design but would have to calc your 'design room' and 2 >> sprinklers in each of the communicating spaces (that have unprotected >> openings). If the door into the other room on the 3rd floor could be >> considered 'Non-rated automatic or self closing doors' as stated in >> NFPA 13, >> 2007 section 11.2.3.3.5 (1), had your 8" lintel opening (opening >> restricted >> to 8' wide), you could calc the sprinklers in the design room and 2 >> sprinklers from the floor below floor. >> Alternatively, since it seems you have water supply to be >> considering the >> additional sprinklers required for the communicating spaces with >> the room >> design, if you were doing .1/1500 design, would the required area of >> operation not be limited to a given floor and would that extra room >> on the >> 3rd floor have more than 2 sprinklers? If the 2nd room on the 3rd >> floor has >> only 2 sprinklers (depending on spacing/flow requirements), it may be >> comparitable to the room design you may be able to justify the calc >> without >> your friend installing auto closing doors, lintel and reducing the >> 12' >> opening. >> A lot of ifs for you. >> >> Damien Shannon. >> >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of >> George Medina >> Jr >> Sent: Thursday, July 16, 2009 10:26 PM >> To: [email protected] >> Cc: [email protected] >> Subject: Room design method - Technical information >> >> ?I am trying to help a contractor friend with a residential fire >> sprinkler >> system originally designed per NFPA-13D using Tyco 'LF-II' 4.9K. >> His client has areas where the beams are spaced less than 3'-6" and >> are 8" >> in Depth . He can not ( or does not) want to change the beam depth or >> spacing if possible so I inquired with the local AHJ about changing >> it to a >> regular NFPA-13 system and using the room design method (so as to >> use quick >> response heads near the bottom of the beams). I got the ok for that >> part, >> but the room configuration doesn't quite fit the code >> configuration. The >> most remote and demanding area is a third floor room (loft?) which >> has two >> compartments one being opened to the 2nd floor below. By reading >> the section >> on 'Room Design Method' it appears the main concern is keeping the >> heat in 1 >> room long enough to activate all the heads in it and possibly 1 or >> 2 heads >> near the unprotected opening. It appears that it would meet all other >> aspects of the code but the only difference being that the high >> room area >> has a 12' wide opening on the 2nd floor to an adjoin room (10' >> below the >> high ceiling). Is there a >> ny research data on the 'Room Design Method' where the mathematics >> and >> science required the 8" lintel and/or 8' maximum width of unprotected >> opening? Any suggestions? (besides walking away from it). >> >> >> >> George Medina Jr. >> Sr. Fire Sprinkler Designer >> 95-1015 Ka'apeha Pl. >> Mililani, HI 96819 >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> For Technical Assistance, send an email to: [email protected] >> >> To Unsubscribe, send an email to:Sprinklerforum- >> [email protected] >> (Put the word unsubscribe in the subject field) >> >> __________ Information from ESET Smart Security, version of virus >> signature >> database 4252 (20090717) __________ >> >> The message was checked by ESET Smart Security. >> >> http://www.eset.com >> >> >> >> >> __________ Information from ESET Smart Security, version of virus >> signature >> database 4252 (20090717) __________ >> >> The message was checked by ESET Smart Security. >> >> http://www.eset.com >> >> >> >> __________ Information from ESET Smart Security, version of virus >> signature >> database 4252 (20090717) __________ >> >> The message was checked by ESET Smart Security. >> >> http://www.eset.com >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> For Technical Assistance, send an email to: [email protected] >> >> To Unsubscribe, send an email to:Sprinklerforum- >> [email protected] >> (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:Sprinklerforum- > [email protected] > (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
