jtpr wrote:
OK, first the good news. I put the box up on some 2x4 pieces around the
edge, couple of knocks with a piece of wood and a hammer and the bottom
popped out. Bad news is; I'm not overly impressed with the adhesive
properties of TB III.


I don't know what happened to my original post, so if this ends up
being a duplicate, what can I say...

I don't know the 'pecifics of the box construction, but it sounds to me
like you may have glued all your end grain to your long grain without
any other mechanical joinery techniques (biscuits, dowels, splines,
etc.). In that case, a hammer was probably just the right choice to
make.

The general rule with glue is that, if you're gluing long grain to long
grain, you have a near-bulletproof joint. If you're gluing end grain
to long grain, you need other mechanical joinery if the joint will be
stressed. If you're gluing end grain to end grain, you're wasting your
time without something else mechanical.

Then again, this may not apply to your situation at all...