Grinnell used to make a head that was rated QR to a certain height and SR if placed higher. I can't recall the number nor do I know if Tyco adopted that head or not.
On Fri, Apr 8, 2011 at 8:01 AM, Bill Brooks <[email protected]> wrote: > In other words, a light hazard occupancy with two different areas of > coverage depending on the type of head? Sounds like the engineer is > concerned about the response time of the concealed heads vs the recessed. > Maybe he/she attended a recent performance design seminar and doesn't > realize we are dealing with rules and not engineering design. Are the > concealed installed at a higher elevation than the recessed? NFPA 72 > adjusts detector spacing for ceiling height, but so far NFPA 13 does not > build this in. Are you in charge of selecting the sprinkler type? > > Bill Brooks > > William N. Brooks, P.E. > Brooks Fire Protection Engineering Inc. > 372 Wilett Drive > Severna Park, MD 21146-1904 > 410-544-3620 > 410-544-3032 FAX > 412-400-6528 Cell > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Mike Hill > Sent: Friday, April 08, 2011 9:39 AM > To: [email protected] > Subject: Concealed Sprinklers Limited to Ordinary Hazard Spacing > > This may have been covered in the past, but I did not see any mention of it. > > > > Recently we have seen contract specifications requiring that concealed > sprinklers be spaced for ordinary hazard requirements, while allowing > recessed sprinklers to be spaced for light hazard requirements in the same > space. Does anyone know where this requirement may be coming from? Want to > make sure I didn't something. > > > > Michael Hill > > Vice President > > > > Phoenix Fire Protection, Inc. > > (301) 669-7066 > > > > _______________________________________________ > 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) > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) _______________________________________________ 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)
