And what is the C factor of any given system but a guess? I just saw a picture of a relatively new system (five years) that had complete clogging of some pipes. C = 0? I'm surprised your AHJ didn't make you calculate for each pipe one diameter smaller than the installed size so as to adjust for age shrinkage.
On Thu, Sep 16, 2010 at 9:23 AM, Thom <[email protected]> wrote: > > Then there's always the question of what C factor to use in your calc's of > an old PS system? Have you seen the inside of these pipes? Do you use 120 or > 100 or maybe even 80? There is really no guide on what's appropriate. I had > one AHJ that just wanted the calc to fail, and required that we use a C of > 80, when that calc still worked, he said oh I meant 60. > There was a fight but we ended up doing an internal inspection of the pipe > and he accepted the calc that used 80. (Still just a guess on his part.) > > Thom > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > -- 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: AFSA, SFPE, ASCET, NFPA, NFSA, AFAA, ASEE, NIBS, WSAFM, WFC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
