IT is also worth pointing out that after trying for 3 cycles to get ANYTHING in 13 indicating at what depth ( meaning distance down form the ceiling verses across the chord) a structural member IMPEDES heat so we can clearly say obstructed or unobstructed. It is indeed 4 inches. See ROC 13-16.
So the determination depends on how far apart the purlins are and how deep they are and is now black and white. Roland On Sep 21, 2009, at 9:45 AM, Greg McGahan wrote: > Has NFPA ever made a formal interpretation on whether purlins > construction is Obstructed or Non-obstructed construction? > > Thanks > > Greg McGahan > Operations Manager > > Living Water Fire Protection > 1160 McKenzie Road > P.O. Box 877 > Cantonment, Florida 32533 > (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 > [email protected] > > > _______________________________________________ > 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) > _______________________________________________ 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)
