Yes. The read from NFPA is (not quoted) UP TO TWO HEADS in the most demanding compartment(s) for 13D and the same but UP TO FOUR HEADS in a 13R. I don't know if you reviewed it and it was a while ago but up in the U District I did a five unit condo that on the floor and directly above the riser room had a three head compartment, and directly above that a two-head compartment and everything else with one head compartments. You guys got a calc for the three head one because it had the most heads even though closest to the riser (2nd floor), the two head one (3rd floor) because it was at a higher elevation than the three header although also directly above the riser, and a single head calc from a compartment also on the 3rd floor because it was the farthest away from the riser. I use this all the time in class because it's a perfect, and simple example of why you sometimes need multiple calcs.
On Fri, May 28, 2010 at 11:39 AM, Richardson, R <[email protected]> wrote: > I had always thought that both NFPA 13R and 13D required a minimum two head > calculation. > > For various reasons we were actually reading it today and notice that there > does not appear to be a minimum number of heads to calc, just calc. how many > heads are in a compartment. > > We have an apartment whose units have 1 head per compartment, is it > acceptable to do a 1 head calc for 13R? > > Thanks, > > Rich Richardson > Seattle Fire Department > > > _______________________________________________ > 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 Bates Technical College Tacoma, WA Member: AFT WA 4184/AFL-CIO, SFPE, ASCET, NFPA, AFSA, NFSA AFAA, NIBS, WSAFM, WFC _______________________________________________ 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)
