The difference in price between a TY-B and TY-FRB is like a dollar or two. On Oct 4, 2013 11:39 AM, <[email protected]> wrote:
> They were more expensive at the time. Can't tell anymore because there are > no LH SR's. > > Ron F > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of rongreenman . > Sent: Friday, October 04, 2013 8:36 AM > To: [email protected] > Subject: Re: Spacing Rules > > Ron, > > Are QRs really more expensive? And if so is it or any real significance? I > thought not but I've been out of money part of the game, at least at the > individual parts level, about fourteen years. Part of my earlier > speculation was in discounting money as being a factor as I thought the > price for an SSP QR was equivalent to an SSP SR. Braeburn to Fuji > relationship, not apple to pineapple. > > > On Fri, Oct 4, 2013 at 8:17 AM, <[email protected]> wrote: > > > Please excuse my contractors cynicism but could it be that QR's are > > more expensive than SR's? What organization requested and paid for the > > testing to justify the reduction and why? > > Could it be that an area reduction results in smaller pipe size at > > less cost to justify the more expensive sprinkler? If there was a > > problem with the reaction time of SR heads in light hazard then make > > the change but why the area reduction? > > > > We do have 225 sqft OH sprinklers, they are called ECOH. > > > > It's Friday and our daily highs are below 100F. > > > > Ron F > > > > -----Original Message----- > > From: [email protected] [mailto: > > [email protected]] On Behalf Of > rongreenman . > > Sent: Thursday, October 03, 2013 6:50 PM > > To: [email protected] > > Subject: Re: Spacing Rules > > > > Well, now that you two have hijacked my thread.... This was a question > > about philosophy and history, not math and time. Let's try again, and > > the bathroom compartmentalization thread is similar to what I'd like > > some feedback on. > > > > Most discussion about spacing rules revolve around arguments relating > > to distribution. I'm wondering how many are based on heat detection. > > > > For instance, why can I use an XYZ SSP head to cover 225 sq in light > > hazard but not ordinary. Since I'm after density over square footage I > > can certainly accomplish this prohibited feat. But after a given > > edition we are suddenly required to use QR heads for light hazard for > > some unspecified reason. That certainly doesn't have anything to do with > coverage. > > > > > > On Thu, Oct 3, 2013 at 10:11 AM, Brad Casterline > > <[email protected] > > >wrote: > > > > > Yes, and by 'different fire curves' I assume you mean fire growth > rates. > > > I want to model the four common 'design fires': SLOW, MEDIUM, FAST, > > > and ULTRAFAST. All four will be "T-Squared", which as you know means > > > the growth is proportional to the time squared. I am not sure what > > > the proper word is for the factor that distinguishes SLOW from FAST > > > but I know what the numbers are and how to calc how many seconds > > > from ignition to peak RHR (Rate of Heat Release). I want to find out > > > what this "...same RHR point..." is. I will have to run (8) > > > scenarios because I want to use two separate max RHR. I will use > > > 1250 kW and > > > 2500 kW. The factor I use for FAST, for example, is .0466 kW/sec2. > > > So a 2500 kW T-Squared FAST fire would peak at > > > (2500/.0466)^.5=~232 > > > seconds. I suppose I could then compare the activation time to the > > > time for max RHR and get a percent before or after for the different > > > growth rates and max RHRs. > > > thanks, > > > Brad > > > > > > -----Original Message----- > > > From: Roland Huggins [mailto:[email protected]] > > > Sent: Thursday, October 03, 2013 10:57 AM > > > To: [email protected] > > > Subject: Re: Spacing Rules > > > > > > I was simply trying to make the reference to time more than just how > > > many seconds have passed and tie it to the level of hazard presented > > > by the fire by using the same point on the different fire curves. > > > > > > Roland > > > > > > > > > Roland Huggins, PE - VP Engineering > > > American Fire Sprinkler Assn. --- Fire Sprinklers Saves > Lives > > > Dallas, TX > > > http://www.firesprinkler.org > > > > > > > > > > > > > > > > > > On Oct 3, 2013, at 5:54 AM, Brad Casterline > > > <[email protected]> > > > wrote: > > > > > > > Dang Roland this opens up a whole new can of curiosity for me. > > > > Figuring out exactly what you mean will give me something to do > > > > the next couple-three lunch breaks. I usually check out the > > > > FDS-SMV discussions > > > but > > > > for some dumba$$ reason the NIST site has been down since Tuesday > > (smh). > > > > > > > > Brad > > > > **************** > > > > ..... A more meaningful reference for activation is in regard to > > > > the same RHR point for the different fire curves...... > > > > > > > > ...... > > > > Roland > > > > > > > > Roland Huggins, PE - VP Engineering > > > > American Fire Sprinkler Assn. --- Fire Sprinklers Saves > > Lives > > > > Dallas, TX > > > > http://www.firesprinkler.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-firesprin > > > kl > > > er.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) > > _______________________________________________ > > 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 > > > > > > -- > 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) > _______________________________________________ > 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
