They used to call them California 90's just because of the use in that state predominately.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Charles Thurston Sent: Friday, January 17, 2014 5:52 PM To: [email protected] Subject: 1/2" and Seismic 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 > they're readily available through plumbing suppliers if your sprinkler > supplier doesn't have them. They come in reducing types, in black > steel, galvy, stainless, bronze, and in weights (strength) equivalent > to schedule 40, 80, 120 & 160. Very common for industrial boiler application. > Sent from my iPhone >> On Jan 17, 2014, at 2:23 PM, Todd - Work <[email protected]> wrote: >> Charles, I would be careful. You can't use 1/2" nipples in an earthquake zone (8.15.19.4.4). Given your proximity to Charleston, this may be a concern. I would assume street elbows (if permitted) would fall under the same category. >> Todd G Williams, PE >> Fire Protection Design/Consulting >> Stonington, CT >> www.fpdc.com >> 860-535-2080 (ofc) >>> On Jan 17, 2014, at 5:05 PM, Kenneth Berman <[email protected]> wrote: >>> close nipples are as close as street ells. 1/2 x 1/2 x 1 tees and >>> you can leave the uprights, or for tight spaces where you can >>> eliminate the upright, use 1 x 1 x 1/2 with a 1" plug. >>> On Fri, Jan 17, 2014 at 3:54 PM, Charles Thurston <[email protected]>wrote: >>>> Hello All, >>>> I do wish I could find some 1/2" Male x 1" Female Street ells for a >>>> upright to pendant conversion project. >>>> Friday, January 17, 2014, 4:25:23 PM, you wrote: >>>>> I think it comes down to if the street elbows are made according >>>>> to the appropriate ASTM standard from Table 6.4.1. In your >>>>> defense, >>>>> 6.4.6.1 states that unless circumstances exist where hex bushings >>>>> are allowed, one piece reducer fittings shall be used for a change >>>>> in >>>> pipe size. >>>>> Todd G Williams, PE >>>>> Fire Protection Design/Consulting >>>>> Stonington, CT >>>>> www.fpdc.com >>>>> 860-535-2080 (ofc) >>>>>> On Jan 17, 2014, at 3:43 PM, "Morey, Mike" <[email protected]> wrote: >>>>>> So I seem to remember this being a "no-no" but the code doesn't >>>>>> seem to >>>> explicitly prohibit us from using them. I have a tight squeeze where a 1" >>>> male x female "street" elbow would be helpful, but I want to make >>>> sure I'm not missing something in 13 that prohibits it, we use the 2010 edition. >>>>>> Mike Morey, CFPS, SET >>>>>> Planner Scheduler/Designer >>>>>> BMWC Constructors, Inc. >>>>>> 1740 W. Michigan St, Indianapolis, IN 46222 >>>>>> O: 317.651.0596 | C: 317.586.8111 >>>>>> [email protected]<mailto:[email protected]> | www.bmwc.com< >>>> http://www.bmwc.com/> >>>>>> _______________________________________________ >>>>>> Sprinklerforum mailing list >>>>>> [email protected] >>>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firespri >>>> nkler.org >>>>> _______________________________________________ >>>>> Sprinklerforum mailing list >>>>> [email protected] >>>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firespri >>>> nkler.org >>>> -- >>>> Best regards, >>>> Charles Thurston mailto:[email protected] >>>> Systems Design Manager >>>> NICET Certified >>>> _______________________________________________ >>>> Sprinklerforum mailing list >>>> [email protected] >>>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firespri >>>> nkler.org >>> _______________________________________________ >>> Sprinklerforum mailing list >>> [email protected] >>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprin >>> kler.org >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >> ler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org -- Best regards, Charles Thurston mailto:[email protected] Systems Design Manager NICET Certified _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
