"Airkings" wrote:
Is it advisable to attach a heavy bag to a basement floor joist and use it
for training? Will the vibrations cause damage? What has people's experience
been? Thanks!

Depends on the house and the beam, but in general I've found the
rattle the whole place.

Pick up a free standing bag frame. There were some good 2-station
frames for about $125 used on ebay.
--Don--
The beatings will continue until morale improves.