In other words, only where the intermediate members exceed 10" depth, will it Maybe need a shave - a few inches deep by six feet long. It is ludicrous to insist on some kind of insulation iso-surface for things to work right! On Mar 29, 2016 12:28 PM, "Brad Casterline" <[email protected]> wrote:
> > It would only be a problem if the rafter depth plus gob depth exceeded > deflector depth, so you're looking at 16" to 22" (6" variation, like you > said). > > But in that regard, it is not an activation issue, it is only an > obstruction issue. > Shave it where necessary to not be an obstruction? > On Mar 29, 2016 12:07 PM, "Brian Harris" <[email protected]> > wrote: > >> Brad- >> The real issue we're having is the haphazard way the sprayed on >> insulation was installed, there's no way to establish minimum & maximum >> deflector distances. >> >> Brian Harris, CET >> BVS Systems Inc. >> bvssytemsinc.com >> >> >> -----Original Message----- >> From: Sprinklerforum [mailto: >> [email protected]] On Behalf Of Brad >> Casterline >> Sent: Tuesday, March 29, 2016 11:23 AM >> To: [email protected] >> Subject: RE: Tyco Attic Heads >> >> Nope. Smoothness above the sprinkler only affects activation times, and >> the differences are only a few seconds. >> Do you worry if the intermediate framing members are 2x4, 2x6, 2x8, or >> 2x10 (a 6" variation)? Do you worry if they are perpendicular or parallel >> to the throw? No, because min deflector distance for back-to-back at the >> peak is 16". This is to get the throw beneath the 'unsmoothness' of the >> bottom of the deck. >> The U.L. tests of Tyco BB heads 'started' with previously listed QR, EC >> heads- only the Deflectors were changed, and the throw patterns at >> different pressures were measured. They did that by not changing the bottom >> of the deck or changing deflector distance, but by raising and lowering the >> Floor :). >> >> And actually I think a little roughness at the bottom of the deck might >> even enhance activation a bit-- but I am certainly no Sprinkler Scientist- >> and the Modeling of BB heads activation and patterns I have done has been >> rather coarse, i.e., quick and dirty ;) >> >> b >> On Mar 29, 2016 9:46 AM, "Brian Harris" <[email protected]> >> wrote: >> >> > I talked with tech support and while he wasn't too concerned about the >> > roughness off the insulation he did agree the insulation needs to be >> > "shaved" to a uniform depth to assure proper deflector distances. >> > >> > Brian Harris, CET >> > BVS Systems Inc. >> > bvssytemsinc.com >> > >> > >> > -----Original Message----- >> > From: Sprinklerforum [mailto: >> > [email protected]] On Behalf Of Bruce >> > Verhei >> > Sent: Tuesday, March 29, 2016 10:44 AM >> > To: [email protected] >> > Subject: Re: Tyco Attic Heads >> > >> > I like Matt's advice. Tyco may have information from original test >> series. >> > Sometimes some of conditions are to meet extreme distance or a minimum >> > available pressure. >> > >> > While I'd repeat that Tyco's comments would apply to this particular >> > project only, could you post? >> > >> > Best >> > >> > Bruce >> > >> > > On Mar 29, 2016, at 06:41, Matt Grise <[email protected]> wrote: >> > > >> > > I would call tyco's technical hotline. >> > > >> > > Matt Grisé PE*, LEED AP, NICET II >> > > Sales Engineer >> > > Alliance Fire Protection >> > > 130 w 9th Ave. >> > > North Kansas City, MO 64116 >> > > >> > > *Licensed in KS & MO >> > > >> > > 913.888.0647 ph >> > > 913.888.0618 f >> > > 913.526.7443 cell >> > > www. AFPsprink.com >> > > >> > > >> > > >> > > -----Original Message----- >> > > From: Sprinklerforum >> > > [mailto:[email protected]] On Behalf Of >> > > Brian Harris >> > > Sent: Tuesday, March 29, 2016 8:40 AM >> > > To: [email protected] >> > > Subject: RE: Tyco Attic Heads >> > > >> > > "bounce..." >> > > >> > > Brian Harris, CET >> > > BVS Systems Inc. >> > > bvssytemsinc.com >> > > >> > > -----Original Message----- >> > > From: Sprinklerforum >> > > [mailto:[email protected]] On Behalf Of >> > > Brian Harris >> > > Sent: Tuesday, March 29, 2016 8:23 AM >> > > To: [email protected] >> > > Subject: Tyco Attic Heads >> > > >> > > Working on a project that we've installed Tyco attic heads and the >> > > GC >> > has now gone in and added roughly several inches of spray on insulation. >> > When I say roughly I mean roughly, the depth varies from 6" to 12" >> > with no consistency what so ever. I've told them that most of the >> > piping will have to be lowered to stay within the required clearances >> > but I also think the insulation needs to be "shaved" to a smooth >> > consistent finish, obviously that didn't go over so well. Since attic >> > heads are considered extended coverage I think it's safe to assume >> > they need to be installed per the requirements of NFPA as well, under >> > a smooth flat surface. Am I missing something? >> > > >> > > Brian Harris, CET >> > > BVS Systems Inc. >> > > Sprinkler Division >> > > bvssystemsinc.com<http://bvssystemsinc.com/> >> > > Phone: 704.896.9989 >> > > Fax: 704.896.1935 >> > > >> > > _______________________________________________ >> > > Sprinklerforum mailing list >> > > [email protected] >> > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprin >> > > kl er.org _______________________________________________ >> > > Sprinklerforum mailing list >> > > [email protected] >> > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprin >> > > kl er.org _______________________________________________ >> > > Sprinklerforum mailing list >> > > [email protected] >> > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprin >> > > kl >> > > er.org >> > >> > _______________________________________________ >> > Sprinklerforum mailing list >> > [email protected] >> > >> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> > er.org _______________________________________________ >> > Sprinklerforum mailing list >> > [email protected] >> > >> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> > er.org >> > >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >> > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
