wrote in message
...
On Tue, 13 Oct 2009 18:16:46 -0500, "Leon"
wrote:
Thank you !

Can I assume most if not all of those floating tenons
were Domino cut and installed?

Well the domino cut the mortises, "I" glued and slid the domino tennons in.
;!)


If so, I was wondering how strong a
joint you get on a 90? joint with 3/4" plywood? I'm asking about
pulling the joints apart, not flexing the 90? join to break the
tenons.

90 degrees? I suspect very strong. I dont want to do it as I use the
smallest 5mm x 30mm Domino tennons on every thing including the face frame
on the front, I think I could stand on the rails. there are 4, 3/4"
plywood fixed shelves from top to bottom. 2 tennons in each side of each
shelf. The towers were very ridgid with the hollow front and back panels.


After all, you're cutting a mortise for a floating tenon that's less
than 3/4" deep. Obviously, you don't want to blast through the
plywood. I think I read it was something like 9/16" deep. Have you
done any personal testing in this area?

In this project all of the tennons mortises and tennons were in the edge of
the 3/4" plywood. No testing done but there are much larger tennons 10mm
thick and about 50mm long. Those should suffice on most any furniture
project. either way I'd feel comfortable in saying much stronger than a
biscuit and stronger than a pocket hole and screw.