I keep running into these types of "obstructions" in the minds of great men (the Wizard did give THEM the gold badge). It usually revoles around pattern development and/or shadowing. My question is just how much fuel loading do you expect to encounter around a doorway and/or how much pattern development were you expecting in 25 sqft anyways? If it were me I'd use that special knowledge and wisdom the Wizard had given me along with the badge and figure that 16 or so gpm would get everything that could burn in that little, empty space pretty wet.
On Tue, Jun 12, 2012 at 12:26 PM, Bob <[email protected]> wrote: > Rick, > Hopefully that 6" drop nipple is a joke. I remember, though it is more > blurry today than in the past, being a young lad who had to jump up and > grab > everything in sight just to see if I could do it. To reinforce this memory > I have four boys between 8 and 16 years and every one of them wants to see > if the can touch, hit, smack, or otherwise reach nearly every target in > sight. In an apartment complex environment, that drop nipple wouldn't last > the first kid. Two sprinklers in a 5 x 5 entry would be ridiculous > overkill. > The purpose in to get the occupants out of the building and surely that one > sprinkler, though partially obstructed on one side would do the trick. > > My thoughts, > > Bob Knight, CET III > 208-318-3057 > www.firebyknight.com > > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Matsuda, > Richard > Sent: Tuesday, June 12, 2012 1:17 PM > To: [email protected] > Subject: RE: residential obstructions > > > There is some guidance in the handbook to allow some "shadowing" from > partial height walls, ceiling fans, lights, and other architectual > featuers...but there is no way to cover every circumstance that will occur > in the real world so you really have to use some judgement. > > Ask the inspector to stand with his back at the door and see when he can > and > cannot see the sprinkler to determine the actual obstruction....line of > sight method. Then look at the area that is obstructed to determine what if > anything might be located in this space that might be burning. A 3-foot > door > will take up at least half of the space so there's really nothing to > protect > in the obstructed area except the door and walls. > > At worse, he will ask you to add another sprinkler on the other side of the > light fixture...so two sprinklers in the 5 x 5-foot entry. If that seems > like an overkill, then it probably is. > I vote for one sprinkler on a 6-inch drop nipple to clear the light > fixture. > :) rick matsuda city of dallas > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of George > Church > Sent: Tuesday, June 12, 2012 1:48 PM > To: [email protected] > Subject: residential obstructions > > I'm interested in feedback on a situation which is occurring fairly > frequently. The specifics may vary slightly, but the concept is always the > same. > In this case, I have an entranceway to an apartment. The entranceway is > roughly 5' x 5'. The ceiling has a soffit 7' above fin. floor. The main > apartment ceiling is 8' above fin. floor. There is a surface mounted light > near the center of the entranceway soffit. The light is 4 3/4" > deep at the center & is a domed light. The light is 1'-2" wide at the base. > I located a recessed pendent residential head within 6" of the edge of the > soffit. My head is 1'-10" from the center of the light. > The local inspector has stated that I am in violation of 13-R. > Technically, he is correct. My head is too close to the light given the > difference in depth of the light vs. the depth of my deflector. Now, there > isn't enough room in the soffit to locate my head & meet code. My head > would > be out of the soffit. Rather counter-productive to say the least. In > addition, if you look at the domed profile of the light, there really isn't > much of an obstruction. This, especially considering the very small space > that the head is covering. > I ask for two things: > 1. Input - as in, is my view valid or am I really missing the big picture? > 2. If I am correct, is there any documentation I can show the inspector? > ( I have already offered to provide the text from the 13-R handbook. To me, > if you read the intent & history of the obstructions rules, this really > isn't an issue. It's extremely similar to the 400 cubic foot closet > exception. > > Thank you in advance for any assistance that can be provided. > Regards, > Michael G. Haley > Rowe Sprinkler Systems, Inc. > 7993 US Hwy 522 > PO Box 407 > Middleburg, PA 17842 > 570-837-7647 > 570-837-6335 fax > [email protected] > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2180 / Virus Database: 2433/5064 - Release Date: 06/12/12 > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > -- 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) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120612/861b7ac8/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
