The first question I would ask, before I even thought about installing ANY kind of sprinkler head inside of a U/L listed light fixture is what happens to that u/l listing? My next thought is --- Well I won't say nuts but really you can't mean that you want someone to drill a listed light fixture to install a sprinkler head inside of its lamp shade or shell??? Really????
I could see having 4 equally spaced sprinkler heads located around the fixture, but inside??? Really??? Obviously there must be more to this than just that, there always is. Like height of sprinkler pipe to the light fixture? Height of fixture above floor? Sprinkler density? SSP or SSU or EC sprinklers?? Distance from roof to Light? Distance from roof to Sprinklers? Type of construction? Concrete, steel, beam open joist, twin tee????? It just seems that D. Withee may not be using as much common sense as she is known for. There has to be a better way. One last question? Is this coming up at plan review? Or final?? If you missed it at plan review when the options were less impactful of everyone, you need to exercise your authority carefully, and it should be tempered with how to make this as painless for everyone, since you missed it in plan review. Just one former contractors point of view. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ron Greenman Sent: Wednesday, February 09, 2011 12:06 PM To: [email protected] Subject: Re: FW: 2010 NFPA 13 8.6.5.2.1.5 13 8.6.5.2.1.5 is is for obstructions less than or equal to18" below the deflector (see 13 8.6.5.2.1.1) and refers to pattern development. 8.6.5.1.2 option 2 is a subsection of 8.6.5.1 and refers to the hazard being shielded from from water reaching it. 13 8.6.5.2.1.5 is about developing the umbrella and where it will go and what might block it while 8.6.5.1.2 option 2 is about a horizontal obstruction that creates a water shadow on the floor. On Wed, Feb 9, 2011 at 9:49 AM, Smith, Steven D. (CSFD) <[email protected]> wrote: > For a coworker... > > > > Subject: 2010 NFPA 13 8.6.5.2.1.5 > > > > Can anyone shed some light on this section? It seems to contradict > section 8.6.5.1.2 option 2. > > > > Does the size of the obstruction not matter? > > > > I have a convention center with 55-inch diameter lights that are 2-feet > deep. The sprinkler contactor is using the referenced section to avoid > dropping a head inside the light to cover below it (as it is built, we > can pipe though the fixture and use a concealed head). > > > > Any thoughts? > > > > Doreen E. Withee > > > > _______________________________________________ > 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) _______________________________________________ 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)
