Reply by Dan Krager

That’s pretty clever. It looks like a rabbet would help at the joint, too. You could stack several layers this way and get a six or eight foot table if you find a good way to support it or lock it rigid or both.
DanK

-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com One should always prefer the probable impossible to the improbable possible.