Re: 1/2" web idea. Spar options--one man's method


Subject:    Re: 1/2" web idea. Spar options--one man's method
From:    David Paule (dpaule@frii.com)
Date:    Fri Mar 12 - 5:44 PM
Finite element analysis isn't necessary. Hand analysis would be considerably 
easier and as accurate.

As it turns out, the two ways to build that spar are equivalent.

With the first approach, there doesn't seem to be a technical reason to make 
the dado 3/4" deep. All that's needed is to locate the web and provide 
enough glue area to ensure a firm bond. Since most glues likely to be used 
will be stronger than the wood in in-plane shear, a person could even glue 
the caps to the web without the dado, if they hold the position while 
clamping. But a nominal small dado would be better. Smaller dados would let 
the builder make the web shallower, too, and therefore probably cheaper.

David Paule


>
> Has anybody done the finite element analysis on the strength provided by 
> this method, Mike's second, in his picture?  I was pondering this just 
> last night...




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