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RE: Light ga. steel publ.[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaoc(--nospam--at)seaoc.org'" <seaoc(--nospam--at)seaoc.org>
- Subject: RE: Light ga. steel publ.
- From: "Silva John (sj)" <SILVA(--nospam--at)hilti.com>
- Date: Thu, 15 Jan 1998 09:34:40 +0100
Thanks for the clarification, Dennis. Mind if I pick your brain a little more? Are you designing a lot of residential steel, or is it mostly commercial? Do you specify the fasteners? Are contractors asking you to approve other fastening methods (clinching, nails, etc.)? J. Silva, SE > ---------- > From: wish[SMTP:wish(--nospam--at)cwia.com] > Reply To: seaoc(--nospam--at)seaoc.org > Sent: Dienstag, 13. Januar 1998 20:13 > To: seaoc(--nospam--at)seaoc.org > Subject: Re: Light ga. steel publ. > > > -----Original Message----- > From: Silva John (sj) <SILVA(--nospam--at)hilti.com> > To: 'seaoc(--nospam--at)seaoc.org' <seaoc(--nospam--at)seaoc.org> > Date: Monday, January 12, 1998 5:30 AM > Subject: RE: Light ga. steel publ. > > > >Dennis, thanks for your response. I've been following the > development > >of residential steel (as opposed to metal framing in general) from > the > >standpoint of whether this trend has got legs and why (I'm in R&D). > Any > >information from my colleagues regarding experiences with residential > >steel projects, pros and cons, outlook for the future, is welcome. > Same > >goes for feedback regarding fasteners. > >John Silva, SE > > > John, > The latest controversy has to do with the discrepency of the APA > report 154 > which was date back around 1993 and the upcomming '97 UBC requirments > for > Steel Stud Shear walls. The APA report indicates the minumum stud > thickness > at 14-18 gauge for shearwalls with a failure mode in the studs rather > than > the plywood connection. > Professor Serette's work at Santa Clara University tested 20 gauge > studs for > shear walls. My understanding is that the tests were done at Simpson > Strong-tie on their shear rack. The 97 UBC recommends 20 gauge studs > for > shear walls. > I would be very cautious of using 20 gauge studs for shearwalls when > past > testing (non-cyclic) has proven that stud buckeling occurs at 16 or 18 > gauge > studs before the panel connection. What is the basis for recommending > 20 > gauge studs in the next code? Is the testing as reported by APA > wrong???? > These questions need to be addressed. Until then, I'll stick with > specifying > 16 or 18 gauge studs in accordance with APA 154. > We have had some communication on the list regarding this subject, but > I > don't think it has been resolved since cyclic testing has not be > evaluated > (I believe it has finally been done) and published. > > Regards, > Dennis Wish PE > > > > >
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