Laminated panels

[Farrell]

----- Original Message ----- 
From: "Jude Reveley/Absolute Piano"
> Yeah eventually there might not be enough wood for anything but laminated 
> panels, but I have the same concern about laminated panels as I do about 
> laminated ribs related to the horizontal shearing stress as these members 
> are under compression.

.....and Richard Brekne wrote:
>> the one board I <<designed>> was not only laminated but laminate crowned.

Jude - Regarding your concern about horizontal shearing stress. Is that 
concern that the panel or rib might fail or degrade in some way as a result 
of whatever shearing stresses might be present? Is your concern that these 
items might fail or degrade more readily than a solid item?

>From what I've experienced, building these items with adhesives such as 
Titebond yields excellent results. Some folks would have concerns regarding 
glue "creep" with Titebond. I don't, but if one did, build the panel or ribs 
with a glass-hard adhesive like two-part urea-formaldehyde. Is "creep" where 
your concern center? I used a modified two-part urea-formaldehyde adhesive 
on the panel that Richard Brekne wrote about. Certainly the bond with that 
adhesive is way stronger and sheer-resistant than the wood itself. And with 
respect to the panel, I should think that crossing grain angles between 
laminations would also make the entire assembly more resistant to stress 
from any direction - including sheer.

Just my thoughts, FWIW.

Terry Farrell