It might pick up vibrations, it might not. you'll just have to try it and see. what kind of mic are you using for the snare?
I've had good luck recently with Fletcher's 3-mic technique outlined over at the Mercenary website. A condenser over the snare/hats (3' up in my case), angled slightly inward and aimed at where I hit the drum. A second matching condenser looking across the floor tom, same distance from and aimed at that same spot on the snare - it's maybe 10" outside the kit and 8" higher than the top of the floor tom. A kick mic a few inches in front of the kick, or a LD condenser out a foot or three.. With a carefully tuned snare and careful fine-tuning of the mic positions, I don't need a snare mic. No phase problems and the snare stays well-centered in the mix.
best of luck,
andrew