Laminated ribs.

[gordon stelter]

I wonder if it would be of any value to laminate the
ribs themselves, at least with one reinforcing
lamination under the area of most pressure?
     Has anyone tried this?
     Thump

--- Ron Nossaman <RNossaman@cox.net> wrote:
> 
> >FWIW - I've noticed on many boards that even when
> positive crown is 
> >present, there often will be an inch-or-two wide
> swath of negative crown 
> >adjacent to the rim. I guess from the ribs being
> thin there.
> 
> I presume so.
> 
> 
> >I wonder what, if any, consequences there may be to
> this.
> >
> >Terry Farrell
> 
> Probably nothing you can directly correlate to
> something you can hear, 
> other than a general deterioration of the board.
> Which brings up a point 
> I've wondered about for a long time. Why are ribs
> most often feathered like 
> that, regardless of whether the assembly is
> compression or hybrid 
> compression/rib crowned? No self respecting
> structural engineer would 
> design a controlled deflection load supporting beam
> that way. Too high 
> stress concentration on the ends for the section
> profile. Very non-uniform 
> stress distribution for something that's supposed to
> support a substantial 
> load, perform dependably and last a while.
> 
> Ron N
> 
> _______________________________________________
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