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Re: Douglas Fir vs. Hem Fir

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Nails have reduced allowables in hem fir.  Be sure you check hangers for the
substitution.  You may wish to design using Hem Fir #2 depending on availability
of lumber.
Jill T. Shuttleworth, P.E., S.E.

AnandNene(--nospam--at)aol.com wrote:

> I have typically specified Douglas Fir no. 1 for beams and headers and no. 2
> for studs and interior partition walls.
>
> Recently, I understand Hem Fir is being increasingly substituted.  It appears
> that the properties are pretty close.  I also know that P.T. mud sill
> specified on the job invariably is Hem fir.
>
> Is the substitution acceptable for walls and floor / roof framing?  Are there
> any items to watch out for?
>
> Anand Nene, S. E.
> ANSE
> Consulting Structural Engineers
> 1624 Franklin Street, Suite 1200
> Oakland, CA 94612-2824
>
> Tel:    (510)-893-3464
> Fax:    (510)-893-3466
> e-mail: anandnene(--nospam--at)aol.com
>