There are rules in 72 about placement near air registers and returns. Objects that alter the flow of smoke, positively like aspirating detectors, or negatively, like obstructions, need consideration. Not necessarily the sprinkler guy's problem as the alarm guy has way more flexibility regarding location of detectors, but something to be aware of. You might want to fish in the 72 pond for this one. Just a thought.
On Fri, Jun 27, 2014 at 6:26 AM, Ben Young <[email protected]> wrote: > I don't know why this question just came to me now and not years ago. > > Are you supposed to treat smoke and CO alarms in 13D systems like you treat > lights and ceiling fans, IE, 3 feet away for pendent heads and 5 feet for > sidewalls? > > There's no four times rule in 13D (Using the 2010 edition) so I'm thinking > the only way to treat it is as a light or ceiling fan. > > A smoke detector is at most, what, six inches in diameter and 2 inches > deep? With a recessed pendent head and the deflector 1" down from the > ceiling you could use the beam rule and stay 1'-6" away. > > I put dashed circles around all the surface mounted lights on my prints for > our guys to install with, and it just hit me that I also put them on the > smokes and COs as a matter of habit. > > Any thoughts on this? Anyone ever have an AHJ question the sprinkler > proximity to a smoke alarm in a house before? > > Benjamin Young > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- 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, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) A problem well stated is a problem half solved. -Charles F. Kettering, inventor and engineer (1876-1958) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
