We have a 5' x 8' antique pool table that weighs approx. 2000 lbs. resting on 4 legs. We would like to put it in our bonus room over a 3 car garage. The floor joists are 16" I beams on 16" centers. They span 20.5'. The wood is laminate with oak hardwood flooring over that. Let me know if you think that additional support will be needed to support the pool table. Thanks, Karen