SFPE hosted a webinar yesterday on Globe’s new attic protection scheme. They had some great video that explained a lot of what is being talked about here. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-553-3553 (fax) 860-608-4559 (cell)
> > On Apr 20, 2018 at 3:19 AM, <Bcasterline (mailto:bcasterl...@fsc-inc.com)> > wrote: > > > > It was pointed out to me off forum the literature cleary shows back to > back cannot be used when the channels are running end to end. > (Thanks again Ed). > So, should the same '8 foot rule' be applied for parallel to the slope > when the channels run end to end? > > Thanks, > Brad > > Quoting bcasterl...@fsc-inc.com: > > > I was glancing through the literature of one of the Specialty Attic > > Sprinkler makers (back-back at the peak) and none of the plan views > > shows which way the channels were running so the delay in activation > > for the rare case of channels running end to end can be neglected, > > apparently. The Fire always goes up fast enough and if that's good > > enough for attic sprks it should be good enough for SSU. > > > > Brad > > > > Quoting bcasterl...@fsc-inc.com: > > > >> That paints a perfect motion picture Roland. > >> So we space for 8ft end to end, not eave to peak. > >> On the off chance the channels run end to end it might be a good > >> idea to go 8 eave to peak too? > >> I've modeled attic type head discharge patterns but it never > >> occurred to me to try and gain a better understanding of the 8ft > >> thing by modelling activation, and now thanks to you I don't have > >> to... > >> Gee thanks Roland, > >> Brad > >> > >> Quoting Roland Huggins <rhugg...@firesprinkler.org>: > >> > >>> Just the opposite but your reasoning when viewed a little > >>> differently will help lock it down. The fire goes up the slope > >>> and does not spread out in the normal circle. This results in the > >>> adjacent sprinklers (from the channel with the heat) seeing much > >>> less of the heat. SO if they are closer to the channel > >>> (represented by a spacing of 8 ft) then a normal pressure but if > >>> further apart (longer activation time) then a higher pressure . > >>> > >>> Roland > >>> > >>> Roland Huggins, PE - Senior VP Engineering > >>> American Fire Sprinkler Assn. > >>> Dallas, TX > >>> http://www.firesprinkler.org <http://www.firesprinkler.org/> > >>> > >>> Fire Sprinklers Saves Lives > >>> > >>> > >>> > >>> > >>>> On Apr 17, 2018, at 11:28 AM, Jeff Normand <jeff.norm...@gmail.com> > >>>> wrote: > >>>> > >>>> I agree that wording confuses me also. Perpendicular to slope. > >>>> Been too long since I've dealt with this and I have to look it up > >>>> each time. But I'm thinking it makes sense that the spacing would > >>>> be up the slope - fire goes up the slope - so no more than 8 feet > >>>> apart up the slope. > >> > >> > >> > >> _______________________________________________ > >> Sprinklerforum mailing list > >> Sprinklerforum@lists.firesprinkler.org > >> > >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > >> > > > > > > > > _______________________________________________ > > Sprinklerforum mailing list > > Sprinklerforum@lists.firesprinkler.org > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >
_______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
