Yea!
I played this games months after release, there was the simple rule:
"the weight of the weapon * 10"
So - for a weapon with 4,5 weight, you needed 45 strength.
But now im a bit annoyed, someone told me that you need, to perfectly use your weapon, the DOUBLE amount in stats. That means to use your weapon perfectly you need about:
4,5 * 10 * 2
So when i want to use the Zweihänder, i need about 90 Strength to use it good, right?
Or is there some rule i didnt see yet?