Charles, it was just a change in wording. The restriction is in 2010 and several years before.
Ron, I'm very glad you made your spelling slip on schedules and not nipples. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT www.fpdc.com 860-535-2080 (ofc) > On Jan 17, 2014, at 6:52 PM, Charles Thurston <[email protected]> wrote: > > Hello Ron, > > Yes Ron that started the thread, I just use it as a transition. I thought > they were, but several industrial plumbing shops in Wilmington were unable to > find them for me. > > Todd > > NFPA 13 2013 > > 8.15.20.5 Revamping of Hydraulic Design Systems. > > 8.15.20.5.1 When hydraulically designed systems are re- > vamped, any existing bushing shall be removed and a nipple > not exceeding 4 in. (100 mm) in length shall be permitted to > be installed in the branch line fitting. > > 8.15.20.5.2* Calculations shall be provided to verify that the > system design flow rate will be achieved. > > 8.15.20.5.3 When it is necessary to pipe two new ceiling sprinklers > from an existing outlet in an overhead system, any bushings > shall be removed and the use of a nipple not exceeding 4 in. > (100 mm) in length and of the same pipe thread size as the existing > outlet shall be permitted, provided that a hydraulic calculation > verifies that the design flow rate will be achieved. > > | 8.15.20.5.4 Where an armover is attached to connect to a > | sprinkler, the use of pipe nipples less than 1 in. (25 mm) in > | diameter shall not be permitted where seismic design is required > | on the system. > > I don't have my 2010 here to see if 8.15.20.5.3 is in it, But 2013 shows it > as a change. This was permitted and started under the 2010 code. > > Yes we seismic brace in the Myrtle Beach Area. > > This is an existing system. 1 1/2" branch with 1/2" outlet "T"s for heads, > They added a L/O ceiling 6" below the top of the pipe in the parking deck. > Now need to nipple over to a Dry Wax Over Lead (Local Ordnance) Dry Head. > Another contractor submitted plans, calcs and got a permit for this a 1/2" > Close, 1/2" x 1" 90, 1' Close nipple, 1" T with plug for the head. The other > contractor's foreman smarted off to one of the owners and they got thrown off > the site. Material is all there, Just need the labor to put it in. > > Friday, January 17, 2014, 5:33:21 PM, you wrote: > >> I thought this was about using 1" st ells in a tight spot, not >> changing uprights to pendants. And of course you can use them and _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
