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Re: Residential Garage (Help!)

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Sorry, I should have said NDS 15.1.  15.1.1 adresses
the moment and 15.1.2 adresses shear.
Randy

--- chuckuc <chuckuc(--nospam--at)pacbell.net> wrote:
> It doesn't look like this addresses the shear issue.
> The NDS procedure
> (& Scott's test?) is for moment distribution.
> Unless the tests use the crappiest allowable framing
> lumber with the
> defects and load strategically located to maximize
> the shear problem
> they don't deal with the design case that typically
> sizes these
> members-shear in the joist.
> Chuck Utzman,P.E.
>
> Randy Vogelgesang wrote:
>
> > I sent this yesterday but for some reason it did
> not
> > go through, one more try.
> >
> > Get a copy of APA report #139 that describes
> concrete
> > over plywood supporting wheel loads.  3/4" ply
> with 3"
> > of concrete will span 16" with a 2000# wheel load.
> The
> > report also discusses the tire contact area and
> how
> > the compressed tires performed.
> >
> > Then distrbute the wheel load to the joists using
> NDS
> > 15.1.1 (this is basically the same as Caltrans/
> > AASHTO).  I perfer a spacing of 12" which results
> in
> > (4) joists using the S/4 factor.
> >
> > Randy
> >
> > P.S. Using this method Scott's perscription of
> 2x12's
> > @12"oc works just fine for a 12'span.
> >
> > --- ASQENGG2(--nospam--at)aol.com wrote:
> > > I need your help!  I am designing wooden joists
> to
> > > carry residential garage. Based on UBC 1607.3.3,
> the
> > > floor system shall be designed for concentrated
> load
> > > of 2000 lbs. on an area of 20 sq.inches without
> > > uniform live load.  With a span of 7 ft., I came
> up
> > > with a size of 4x10. But the architect wants me
> to
> > > use maximum size of 2x12. Can I still reduce the
> > > 2000 lbs. load? Can I also use load duration
> factor
> > > for Impact of 2.0 instead of occupancy load of
> 1.0 ?
> > >
> > > Thanks in advance,
> > >
> > > ASQ
> > >
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