Thom, I'm hip. He suggested in rather unflattering terms that since his attachment method for the seismic bracing was using two fasteners he could double the load and make it work. While I have some information that agrees with him, including a very nice structural engineer who answered my questions for free, I still don't have any data on the strength of a 4x12 to withstand that load horizontally.
It's been an interesting day, believe me. PARSLEY CONSULTING Ken Wagoner, SET 760.745.6181 voice 760.745.0537 fax [email protected] <mailto:[email protected]> e-mail www.ParsleyConsulting.com <http://www.ParsleyConsulting.com> website Thom McMahon wrote: > TALCO fig. 52,56 and 58 Side beam hangers are only listed for up to 4" > pipe. > Fig. 51 is listed for 6 & 8", but you need to use the 1/2" lag bolt of > appropriate length (3") per 9.1.5.3.1. > The bigger problem is the seismic loads which make you use 9.3.5.9.1 > to size > thru bolts and lags, where the min for 6" is a 4-1/2" lag. (Into a 4" > beam?) > Thru bolts only allow 485# on a single thru bolt 1/2". > > So besides the structural engineer approval, you'll need to check the > anchors and fasteners. > > Thom McMahon, SET > Firetech, Inc. > 2560 Copper Ridge Dr > P.O. Box 882136 > Steamboat Springs, CO 80488 > Tel: 970-879-7952 > Fax: 970-879-7926 > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Parsley > Consulting > Sent: Wednesday, July 15, 2009 8:16 AM > To: [email protected] > Subject: Structural concerns > > John, > > I'm looking at one of those now. A designer has sent me a set of plans for > review and is just incensed that I would question the ability of a > side beam > bracket in a 4x12 to properly support the weight of a 6" main. > He was equally upset when I asked if he had information from the > structural > engineer to endorse the same member accepting a horizontal force of almost > 800 pounds in lateral seismic loading. > > He told me stuff about my mom that I never knew. > PARSLEY CONSULTING > Ken Wagoner, SET > 760.745.6181 voice > 760.745.0537 fax > [email protected] <mailto:[email protected]> e-mail > www.ParsleyConsulting.com <http://www.ParsleyConsulting.com> website > > > > > John Drucker wrote: >> George, >> >> Some of us do. The 20006 IBC (Chapter 16 - 1602.1, 1606.2 1604.2) does >> include provisions with regards to sprinkler piping loading. There >> have been times when the loading of a structural member has been >> questioned and where the structural engineer has responded by >> "beefing" up the connection. If the fire inspector isn't picking it >> up the > building inspector sure should be. >> >> 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 George >> Church >> Sent: Wednesday, July 15, 2009 5:03 AM >> To: [email protected] >> Subject: RE: Trapeze hangers? >> >> I saw a WalMart renov in York where the 6" main was c-clamped to the >> bottom "wave" of those bar joists that have Z purlin material instead >> of angle iron as a bottom chord. >> >> I moved over a few feet so as not to be walking underneath it. How can >> anyone look at that and not raise a question? >> >> glc >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of J. >> Scott Mitchell >> Sent: Tuesday, July 14, 2009 11:22 PM >> To: [email protected] >> Subject: RE: Trapeze hangers? >> >> I saw an aircraft hangar once that had 8" bulk mains hung from this >> light weight construction. The sprinkler contractor and structural >> engineer put their heads together before hand. The result was strut >> channel trapezes spaced 8 ft apart and spanning four z-purlins. >> >> The real headache comes when there is no engineer and the GC buys a >> pre-engineered building from a building company who says the warranty >> is void if you hang anything from the purlins. >> >> J. Scott Mitchell, P.E. >> >> --- On Tue, 7/14/09, [email protected] <[email protected]> wrote: >> >> From: [email protected] <[email protected]> >> >> It's very well possible. It all depends on the size and gauge of the >> structural member. More and more installations are using >> pre-engineered buildings which are typically of a light weight >> construction and not really designed for much static loading from the > steel. >> Craig L. Prahl, CET >> Fire Protection Specialist >> >> >> >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> http://lists.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 >> http://lists.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 >> http://lists.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) >> ---------------------------------------------------------------------- >> -- >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 8.5.387 / Virus Database: 270.13.14/2238 - Release Date: >> 07/14/09 18:03:00 >> >> > _______________________________________________ > Sprinklerforum mailing list > http://lists.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 > http://lists.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) > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.387 / Virus Database: 270.13.15/2239 - Release Date: > 07/15/09 06:07:00 > _______________________________________________ Sprinklerforum mailing list http://lists.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)
