User blog comment:Badassmcawsome/DS2 Dual Weilding, some questions/@comment-5264386-20140630093515

You have to have 1.5x the Dexterity and Strength requirements of the weapon with the highest of each; however, Intelligence and Faith are excluded from this requirement. So say I wanted to dual-wield Giant Warrior Clubs. In order to do so, I would need 90 Strength (60 * 1.5 = 90). In addition to this, some weapons are not compatible with others. For instance, you can't use a Greataxe with a Rapier (for obvious reasons). A good rule of thumb for weapon compatiblity is that if the two weapons have a similar attack style (i.e. Strike, Thrust or Slash), then they will most likely be compatible.

Anyway, hope this helps explain it for you (and anyone else who ends up reading this).