NFPA 13, 2010, 8.15.22.3 only applies when open to an adjacent space on ONE side only. Maybe I am wrong, but based on what has been described sounds like it is open on ALL sides, thus 8.15.22.3 does not apply. This described situation would require sprinklers at the deck over the entire area because a concealed space has not been created (due to the described space being open on all sides).
Providing sprinklers at the deck for 24-ft. beyond, on all sides is not correct. Just my opinion. Jeff Hewitt, PE, SET, SFPE (Professional Member) Corporate Engineer Bi-State Fire Protection Corporation 241 Hughes Lane St. Charles, MO 63301 636-946-0011 636-946-5172 (fax) 314-574-6989 (cell) Fire Sprinklers Save lives. Can You Live Without Them? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Greg McGahan Sent: Thursday, March 10, 2011 10:45 AM To: [email protected] Subject: Re: partial walls in mech rooms Well, you have to go 24 feet which ends up being an area of approx, 55' x 54' that you are now required to put heads in. I Although the example in the handbook refers to a warehouse/office space in which the clarification is that protection must extend 24' over the offices and the area of greater hazard is outside the 24' zone, I guess it is similar, but it is a stretch in my opinion. In this case, the greater hazard is surrounded by a lesser hazard on 4 sides, Therefore if 8.15.22.3 applies, we will end up protecting the entire non-combustible interstitial space. Before I argue for this change order I want to make sure this is the intent on the code. Thanks, Greg On Thu, Mar 10, 2011 at 10:31 AM, Bob Knight <[email protected]> wrote: > I think in this case you are "cooling" the structure in an area that heat > could become a factor. 2010 ed. Requires .6 times the sq rt of the area or > a minimum of 24' extended into areas such as this (8.15.22.3 & .4). > > BK > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Brad Casterline > Sent: Thursday, March 10, 2011 9:10 AM > To: [email protected] > Subject: RE: partial walls in mech rooms > > I cannot get past the idea that we normally put water on floors, not on the > tops of ceilings! > > -----Original Message----- > From: Greg McGahan [mailto:[email protected]] > Sent: Thursday, March 10, 2011 10:00 AM > To: [email protected] > Subject: Re: partial walls in mech rooms > > It is not CLEAR, this section appears to refer to the "cloud" situation we > are often running into. > > I am not trying to get out of something here, I am trying to document why > we have to do it. We have used the 15' rule in the past, but again, that is > truly intended for another situation, in my honest opinion. This section is > to avoid fusing heads in adjacent areas, not require additional > protection... as I read it. > > On Thu, Mar 10, 2011 at 9:47 AM, Morey, Mike <[email protected]> wrote: > > > On second reading, if you're saying the LH areas have a ceiling but > > the mechanical rooms don't then 8.15.22 does apply, in which case the > > higher area is the roof deck, which means you provide the protection > > for the mechanical room at the deck and for 24' in any direction away > > from the mechanical room over the ceiling of the LH space. > > > > -Mike Morey, SET > > Sprinkler Designer > > BMW Constructors, Inc. > > office: 317-651-0596 > > mobile: 317-439-2695 > > > > ________________________________ > > > > From: [email protected] on behalf of Greg > > McGahan > > Sent: Thu 3/10/2011 10:21 AM > > To: [email protected] > > Subject: partial walls in mech rooms > > > > > > > > We have an issue right now with a light hazard non-combustible > > building in which there are multiple small mechanical rooms -3' x 8' > > or 6' x 7' in general size. The architect was vague so the GC is not > > putting in ceilings nor is he running the walls up to the deck. > > > > I have been reading and rereading chapter 8 of 13 -2010 edition, and I > > cannot conclusively determine what we are required to do in this case. > > The description in 8.15.22.1 is not exactly correct so I can't see > clearly... > > > > Does anybody have a cut and dry answer? > > Thanks, > > Greg > > > > -- > > Greg McGahan > > Living Water Fire Protection, LLC > > 1160 McKenzie Road > > Cantonment, FL 32533 > > 850-937-1850 > > fax 850-937-1852 > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.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) > > > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.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) > > > > > > -- > Greg McGahan > Living Water Fire Protection, LLC > 1160 McKenzie Road > Cantonment, FL 32533 > 850-937-1850 > fax 850-937-1852 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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) > -- Greg McGahan Living Water Fire Protection, LLC 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 fax 850-937-1852 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
