I took this from another post so as not to derail it. [ QUOTE ] Engineers use it (wood being 5x stronger in tension) as design guide when designing wood structures. Its 5 times stronger when you are pulling on it than if you are pushing on it or trying to put pressure in the middle. On construction sites contractors have had us try to lift a single 2"x4" out of concrete and we lifted 3000# on it and it didn't budge. [/ QUOTE ] if you bend a straight branch (or 2x4) in to a "U" shape you create tension wood on the outside of the bend and compression wood on the inside of the bend. When the branch finally brakes, it brakes the tension wood first. So does this mean compression wood is even stronger than tension wood? Is there anyone that can take a 2x4x6" and pull it apart and take the same size piece and try to crush it? I'm just curious.