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RE: 3/8" Plywood shear values on metal studs.

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Sorry, it's the fever. As Gilda Radner would say "Never Mind".  I don't have
any real comment on hot-rolled.

> -----Original Message-----
> From: Bill Allen, S.E. [mailto:Bill(--nospam--at)AllenDesigns.com]
> Sent: Sunday, July 12, 1998 9:52 PM
> To: seaint(--nospam--at)seaint.org
> Subject: RE: 3/8" Plywood shear values on metal studs.
>
>
> You need to re-read (after you've had some rest) my tongue and check
> specifications my friend. The steel studs I specified were hot rolled
> sections.
>
> Regards,
> Bill Allen
>
> -----Original Message-----
> From: Dennis Wish [mailto:wish(--nospam--at)cwia.com]
> Sent: Sunday, July 12, 1998 7:46 PM
> To: SEAOC Listservice
> Subject: RE: 3/8" Plywood shear values on metal studs.
>
>
> I think that the problem here is not the failure of the panel,
> but that the
> failure mode in cold-formed steel stud construction tends to be
> buckeling of
> the studs. In each of the tests done on 7/16" OSB and 15/32" Plywood, the
> maximum shear allowed was based upon the limit where the studs
> buckeled and
> not where the panel failed.
> It is my understanding that the second most common point of
> failure occured
> when 16 and 18 gauge studs were used. Although the main mode of
> failure was
> again the buckeling of the studs, the secondary problem was the
> shearing of
> the screws due to the stiffness of the steel. The '97 code reduced the
> thickness of the studs to 20 gauge in order the create more
> ductility in the
> connection.
> If anyone has more up to date information, please share it. I am working
> from memory and may have a few facts turned around - however, I
> don't think
> so.
>
> Dennis
>
> > -----Original Message-----
> > From: Bill Allen, S.E. [mailto:Bill(--nospam--at)AllenDesigns.com]
> > Sent: Saturday, July 11, 1998 3:42 PM
> > To: seaoc(--nospam--at)seaoc.org
> > Subject: RE: 3/8" Plywood shear values on metal studs.
> >
> >
> > So would 1/4" steel plate shear walls with 1/2" diameter plug
> > welds @ 6" and
> > studs consisting of C3x4.1 @ 16".
> >
> > Regards,
> > Bill Allen
> >
> > -----Original Message-----
> > From: Tjb5424744(--nospam--at)aol.com [mailto:Tjb5424744(--nospam--at)aol.com]
> > Sent: Saturday, July 11, 1998 3:27 PM
> > To: seaoc(--nospam--at)seaoc.org
> > Subject: Re: 3/8" Plywood shear values on metal studs.
> >
> >
> > It used to be kosher to use drywall and stucco shearwalls.  And
> > now they're
> > taboo.  3/8" would give one the hebee gebees after Northridge.
> Let's all
> > design the walls according to their relative flexural and shear
> rigidities
> > and
> > limit the H:W to reasonable values as well.  This, along with
> 15/32" five
> > ply
> > struct.I and 10d commons should solve the problem
> >
> > Ted Beckwith
> >
> >
> >
> >
> >
> >
> >
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