My expertise (ha) is always in question. I understand your concern. Think of it this way. The area of the mezz now has less storage, is less hazardous (probably) and has more sprinklers so why would the sprinkler demand increase? NFPA is not a very good source for what isn't required. I guess you have to look at the requirements and if you meet them your done. Of course there is always the odd AHJ/Sprinkler Scientist out there lurking so always be ready to make your case.
I suppose you could call the mezzanine an obstruction under the ESFR rules, put ESFR's under the mezzanine and re-calc the roof system accounting for 2 heads under the obstruction. Of course then you probably have to remove and re-pipe the entire roof system. Don't get me started on ESFR obstruction rules. Ron -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jimmy Waite Sent: Wednesday, September 19, 2007 3:44 PM To: [email protected] Subject: RE: Mezzanine/ ESFR Ron, Not to question your expertise, I've never dealt with ESFR protection, and just want to be sure. Is there any documentation that says I don't have to carry the higher hazard 15 ft. underneath the mezzanine? You said it was too low, what then would be the height threshold? Thanks so much for your help. Jimmy Waite -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fletcher, Ron Sent: Wednesday, September 19, 2007 4:18 PM To: [email protected] Subject: RE: Mezzanine/ ESFR Sprinklers below and ESFR above just like an office area. The mezzanine is too big to be an obstruction (my opinion), too low to require ESFR's and you can't omit sprinklers. The 15 ft. rule would be applied to the full height warehouse and extend 15 ft. past the edge of the mezzanine. Not an issue here unless you want to pull the ESFR's above the mezzanine and do area density with control mode, but why? Ron -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jimmy Waite Sent: Wednesday, September 19, 2007 2:32 PM To: [email protected] Subject: RE: Mezzanine/ ESFR Ron, Thanks for your response. Can I ask your reasoning behind it? Jimmy -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fletcher, Ron Sent: Wednesday, September 19, 2007 2:45 PM To: [email protected] Subject: RE: Mezzanine/ ESFR Forget the ESFR's. Just sprinkler the mezzanine. Ron Fletcher Aero Automatic Phoenix, AZ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jimmy Waite Sent: Wednesday, September 19, 2007 12:25 PM To: [email protected] Subject: Mezzanine/ ESFR Hello all again, Apparently the thing to do out west is to add mezzanines years after the original building is built, and then sprinkle them after you get caught/get in trouble. We have a job that is a warehouse designed with and ESFR system. The owner has since come in and built a mezzanine. The mezzanine is roughly 67' by 33.5' and is about 9'-10 tall. The mezzanine is located on an exterior wall, and the warehouse is 30' tall at the peak. There is no separation around the exterior of the mezzanine. Now that I have explained the space, let me explain the scenario. The space under the mezzanine is used to pull orders. They keep the merchandise in plastic totes while it is under the mezzanine. So all the storage is transient. The totes sit in a flow through racks, to hold orders before they go to a truck, that doesn't store above 5'. Now to my question. Now the standard seems to be pretty clear, that since there is no separation, the '07 in sections 11.1.2 (1) and 12.3 (1) say that since there is no separation the hazard needs to be carried 15'-0 beyond the hazard perimeter. Do these sections apply to both above and below the mezzanine? Would I have to carry the ESFR design criteria 15' into the mezzanine floor area? This seems a bit much considering the space would normally be misc. storage in the'07. But I also can see the justification to increase the design criteria since the mezzanine is surrounded on three sides by storage. If ESFR is required I know I'll have several problems. I won't have the clearance needed between the deflector and storage. Also, the mezzanine is non-combustible Obstructed construction. Would there be any other design criteria I could use, other than ESFR? I've never done an ESFR system before and definitely need the help. I have pictures that could clarify what I'm talking about if anyone would like them that I willing to give some suggestions. Jimmy Waite Burtell Fire Protection, Inc. [EMAIL PROTECTED] (406) 652-7697 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
