With the new at least to me FM stuff does anyone know how to figure the total number of heads and the shape?
I'm in the new 3-0 and it seems straight forward to determine the total number of sprinklers with one exception. How do I round, sprinkler rounding or mathematical rounding? In the number of sprinklers on a line they are clear we mathematically round. But one of the variables is total number of heads. My particular case I come up with 7.17 heads total (started with EC 25 6 at 30 but I'm a little less than 196 sq.ft.). If I use 7.17 or 7 I come up with 3.42 heads/line and only calc 3, great. But if I round to 8 like in normal NFPA world I come up with 3.6/line thus calc 4. And we all know the impact of adding a head/line especially when dealing with 138 gpm/head. Or is it both use 7.17 in the heads/line and 8 total in the calc? My FM rep is gone for a bit and I'm trying to finish up some things. And this is a primer for a lot of new concepts FM is throwing at us if you haven't seen them yet. Wes Baker was out to our SFPE chapter meeting last week and I left with my head spinning. From what I see in an edition or 2 this will be NFPA too. Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: [email protected] Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 _______________________________________________ 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)
