Thirty plus years of doing this stuff and that's the first time I've heard a rational reason for defining a BOR. I've heard all of Ed's and they all make sense but the rationale is not always solid. I've personally always used the transition point from UG to system (or actually six inches above finished floor since that's the usual contract language for the location of the UG flange) but Leyton makes more sense. And I hate it when I have to admit that.
On Fri, Aug 21, 2015 at 7:33 AM, Steve Leyton <[email protected]> wrote: > Since the ongoing benchmark for the life of the system is the main drain > test, I've always set our BOR node at the rough elevation of the drain > valve. 3-4' AFF. > > Steve L. > > > > > > -----Original Message----- > From: Sprinklerforum > [mailto:[email protected]] On Behalf Of Ed > Kramer > Sent: Friday, August 21, 2015 7:31 AM > To: [email protected] > Subject: What is 'base of riser'? > > This may have been discussed previously, I don't recall. > > Assume an underground fire service enters a building, multiple system > risers are located in an interior mechanical room approx 50' from the > stub-in location. In the mechanical room there is a backflow prevention > device and multiple system risers. Where is the "base of riser" - you > know, the "base of riser" that listed on the hydraulic design placard? > > a) At the bottom of each individual system riser - a slightly > different > physical location for each system? > > b) At the discharge side of the backflow prevention device? > > c) At the inlet side of the backflow prevention device? > > d) At the underground flange? > > > > I'm curious how others see this. > > > > Ed Kramer > > Lawrence, KS > > _______________________________________________ > 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 > -- 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) A problem well stated is a problem half solved. -Charles F. Kettering, inventor and engineer (1876-1958) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
