Hmmmm . . . I've been using my EZ-curl bar and just piling 25s on the ends (I'm only doing 165-170ish so far), so the bar doesn't actually touch the ground (I'm 5'11"). I thought that the "pull from the floor" thing was just a way of saying "you should be parallel to the ground," which means for most people, the 45s on a regular bar will wind up touching the ground due to ROM. I didn't know you were supposed to actually deweight as w/ the deadlift . . . I've just been letting my arms hang to full extension and then blasting 'em back up.