ElvishBard said:Yes. Any time you use a two handed melee weapon you get the 1.5x bonus.
Hypersmurf said:Unless it's a rapier.
Rapier: You can use the Weapon Finesse feat to apply your Dexterity modifier instead of your Strength modifier to attack rolls with a rapier sized for you, even though it isn’t a light weapon for you. You can’t wield a rapier in two hands in order to apply 1-1/2 times your Strength bonus to damage