Originally Posted by Sydwayz

Depends on the stress of the load. I'm not just talking about a little Elmer's Wood Glue sticking them together either.

I'm talking about two boards that are soaked in glue and and are pressed and baked together as part of a manufacturing process.

I would have never thought it either, but I was shown the breaking strength numbers when I was building my pole barn a few years ago. My "6x6"s are actually 3 - 2x6s that are glue-laminated together. They are stronger, more solid (dense), heavier, and more resistant to warping than a solid 6x6.