The 1.2x sqrt(RA) is independent of the sprinkler spacing. With irregular branch lines, what I tend to do is to make sure that the furthest part of the remote area meets that requirement and then work my way in, keeping that distance as much as possible until the line with fewer sprinklers. Remember, the RA does not have to be a perfect rectangle. The examples in the book are there to describe a concept and not be an absolute.
At 02:41 AM 4/20/2010, you wrote: >If I am calculating a tree type system using the >area/design method, and have several different >lengths between sprinklers on a branch line. >Would I use the longest length to determine the >amount of sprinklers on a branch line. I have >always used an average (which I've probably been >wrong all these years). 1.2âdesign >area S S= Distance between sprinklers >on branch line 1.2âdesign area S S= >Distance between sprinklers on branch line >George Medina Jr. >_______________________________________________ >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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.com _______________________________________________ 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)
