Cutting rib radii

[Farrell]

I think you are correct, but that is likely only because wood properties are 
not often perfectly uniform. If you had a beam and panel both with uniform 
properties, I'm quite sure the curve formed on a compression board would 
indeed be an arc of a circle. That's my guess - without a mathematical 
proof - becuase the bending forces would be uniform across the entire length 
of the beam - so you'd get a uniform arc. This would only be true however if 
the beam was of uniform dimensions, i.e. no tapering at the ends.

But, as I previously asked, and several responded, ultimate shape of the 
curve may not be so critical.

Terry Farrell

----- Original Message ----- 
SNIP
> As far as how important the type of curve produced is, I defer to those 
> who
> have commented that it doesn't probably make much difference.  Also, in a
> compression style board, I would imagine the curve formed by the rib being
> bent by panel expansion is not a perfect circular arc.
>
> David Love