1/2" & 3/4" steel is allowed if per 8.15.19.4.2, but not in seismic.
-----Original Message----- From: James Zimmerman [mailto:[email protected]] Sent: Monday, June 14, 2010 3:42 PM To: [email protected] Subject: Re: 3/4" pipe Thanks, that is what I was over looking. Saw the pipe schedule stuff but missed 22.4.1.2 On Mon, Jun 14, 2010 at 3:34 PM, John Drucker <[email protected]>wrote: > 2007 NFPA-13 > > 22.4.1.2 Hydraulically Calculated - Pipe sizes shall be no less than 1 in. > (25 mm) nominal for ferrous piping and 3/4 in. (20 mm) nominal for copper > tubing or nonmetallic piping listed for fire sprinkler service. > > Table 22.5.2.2.1 Light Hazard Pipe Schedules - 1" Min > > Table 22.5.3.4 Ordinary Hazard Pipe Schedule = 1" Min > > Table 9.2.2.1(a) Maximum Distance Between Hangers (ft-in.)- 3/4 - Steel - > Not Allowed (N/A) > > Hope that helps > > John Drucker, CET > Fire Protection Subcode Official > Fire/Building/Electrical Inspector > Fire Marshals Office > Borough of Red Bank, NJ > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of James Zimmerman > Sent: Monday, June 14, 2010 4:07 PM > To: [email protected] > Subject: 3/4" pipe > > I have a specification that states nothing less than 1" pipe shall be used > for a sprinkler system. Is there anywhere in NFPA 13 that prohibits the use > of 3/4" pipe? I know in the 2007 Edition 8.15.19 states new installations > shall have a minimum of 1" outlets for piping supplying sprinklers below > ceilings. This section doesn't specifically come out and state that all > piping must be 1". In 8.15.19.4 all piping with the exception of a 4" > nipple > shall be 1" minimum. > Am I missing something or is 3/4" allowed per NFPA 13? > > Thanks, > > Jim > _______________________________________________ > 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]<to%3asprinklerforum-requ...@fire sprinkler.org> > (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]<to%3asprinklerforum-requ...@fire sprinkler.org> > (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) _______________________________________________ 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)
