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Re: Steel flitch plates

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gotta see some numbers..............................

btw even if the plates bear on the support (wood?) I think you'd be in
trouble unless there is some steel on the support to spread the load.

the devil is in the details

cheers
Bob

On 7/27/05, Jim Wilson <wilsonengineers(--nospam--at)yahoo.com> wrote:
> I'm reviewing a design to strengthen an existing
> triple 2x wood beam by adding steel plates to the
> outside faces.  Buckling is a concern for plates in
> compression.  Bearing is also a concern because any
> capacity developed into the plates has to be balanced
> by a support reaction of the plates at the bearings.
> If the plates do not bear on the support, then any
> load in the plates is transferred in and out of the
> members through bolt shear alone.
> 
> So, I've convinced myself this is not an acceptable
> detail.  However, its been done many times before and
> I'm just wondering if there aren't any old-school
> "design guides" that might indicate ways to properly
> bolt these plates in place so that they do actually
> support some load.  This might save me raining on my
> architect's parade.
> 
> The same question would also pertain to using steel
> channels, except that possible buckling would be much
> easier to eliminate.
> 
> Any thoughts would be appreciated.
> Jim Wilson, PE
> Stroudsburg PA
> 
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