And you have to determine what edition was in use by the jurisdiction at the time of the installation.
On Mon, Jun 11, 2012 at 8:16 AM, Todd Williams <[email protected]> wrote: > 1989 section 5.2.3.1 includes it in the last sentence. The other editions > (at least later ones) had it as a separate section. > > > > At 11:03 AM 6/11/2012, you wrote: > > > http://dbase.firesprinkler.org:591/online_archives/tech_interps/FMPro?-db=informal-interps.fp5&-format=record_detail.htm&-lay=form&-recid=12629921&-findall= > > > >You asked the following question "What year did NFPA ban the use of > gridded dry pipe systems?" In response to your question, we have reviewed > the 1989 and the 1991 Edition of NFPA 13 as the applicable standards. Our > informal interpretation is that the 1991 Edition of NFPA 13 was the first > edition to ban the use of a gridded dry pipe system. The 1989 NFPA 13, > Subsection 5-2.3.1 "Volume Limitations" discusses gridded systems. > Exception to 5-2.3.1 talks about the ability to exceed the maximum system > volume of 750 gallons for non-gridded systems. I did not have a copy of the > 1989 Handbook available but the 1987 Handbook had a commentary on > Subsection 5-2.3.1 "Volume Limitations". The commentary to "Volume > Limitations" discusses the problem of excessive delays in water delivery > for gridded dry systems. The next NFPA 13 Edition following 1989 is the > 1991. Under Subsection 3-2.3.1 "Volume Limitations" is Subsection 3-2.3.2 > that states, "Gridded dry pipe systems shall not be install > ed." This is the first occurrence in NFPA 13 for the ban on gridded dry > pipe systems. The commentary in the 1991 Handbook state that in more the 90 > percent of the installations of gridded dry pipe systems, the times for > delivering water to the inspector's test connection were excessive. The > commentary further state that in some cases it took as long as 10 minutes > for the water to be delivered to the inspectors test. In conclusion, NFPA > 13 up to the 1991 Edition allowed gridded dry pipe systems. The 1991 > Edition banned the use of gridded dry pipe systems > > > >Dan > > > > > >-----Original Message----- > >From: [email protected] [mailto: > [email protected]] On Behalf Of George Church > >Sent: Monday, June 11, 2012 7:56 AM > >To: [email protected] > >Subject: dry grid prohibition > > > >Would anyone know when dry grids were taken out of NFPA 13? My > recollection is mid 1980's, but don't have a copy to check. > > > >We've encountered a dry-pipe system installed circa 1999, purported to be > in accordance with NFPA 13- 1994 according to the signature of a NICET > Level IV, complete with little NICET symbol that looks like a seal....oh > well. But each of the four wings is protected by a small gridded system. > > > >Can someone say whether or not dry grids were permitted in the 1994 > edition of 13? > > > > > >George L. Church, Jr., CET > >Rowe Sprinkler Systems, Inc. > >PO Box 407, Middleburg, PA 17842 > >877-324-ROWE 570-837-6335 fax > >[email protected] > > > > > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > 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 > -- 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: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120611/b5019145/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
