According to the code, the sprinklers throughout a room should be of the same Temp rating and sensitivity,
It would be more logical to use lower temp rating and QR heads under an obstruction. Dan Dan Arbel Tel: 972-4-8243337 Fax: 972-4-8243278 M: 972-52-2810593 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe Hankins Sent: Monday, August 27, 2007 8:51 PM To: [email protected] Subject: Re: Obstruction issue Listen to Roland, and think about how sprinklers work. Sprinklers under obstructions will typically operate only when there is a fire directly under them, so at most 2 sprinklers will operate, and they will in all probability prevent the sprinklers directly above them at ceiling from operating. Stop thinking about a fire as big as the operating area, because if you have that, the battle was lost a long time ago. Joe Todd Williams - work wrote: > Is it really academic when the sprinklers below the obstructions > triple the number in the area and the heads at the deck might do > little other than activate? > > > At 01:02 PM 8/27/2007, you wrote: >> stop thinking about academic realities and embrace the explicit >> methodology. After all, do fires activate sprinklers in areas that >> are long rectangles, do individual sprinklers discharge water as a >> 10X13 shape, do you think we are getting the assigned density on the >> floor, etc etc? Why get hung up on ignoring the sprinkler below the >> obstruction (provided it's not an ESFR and though unstated, it isn't >> a mile of 1 inch pipe feeding multiple sprinklers)? >> >> Roland >> >> On Aug 27, 2007, at 9:09 AM, Todd Williams - work wrote: >> >>> >>> Secondly, NFPA 13 (2002) section 11.2.3.1.8(6) says that sprinklers >>> below obstructions do not need to be included in the hydraulic >>> calculations. I am having a hard time accepting this as well >>> because I'm not sure the potential fire demand will only include >>> sprinklers at the deck. Actually, sprinklers at the deck may be so >>> obstructed that very little will effectively get to the fire area. >>> I would think it be more than likely a combination of sprinklers >>> above and below. Any thoughts? >>> >>> Todd G. Williams, PE >> >> _______________________________________________ >> 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) > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, Connecticut > 860-535-2080 > www.fpdc.com > _______________________________________________ > 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) __________ NOD32 2487 (20070828) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com _______________________________________________ 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)
