Quote Originally Posted by diem View Post
This has worked for me. After locating a ceiling joist, drill a 3/8 hole through the plaster or drywall only to the joist. Then drill a 1/8 or 3/16 hole in the joist deep enough to take the whole thread of a 1/4" screw-eye or screw-hook. First time in and out with the screwwye or hook will require a tool to get the torque, but after that it only has to go in 8 threads or so, finger tight, when required. When out of use, no one will notice the holes in the surface, drilled oversize to prevent more obvious surface damage. Oh - and don't damage the sub!
Please do not do this!

One screw eye into a single joist is NOT enough to support anything more than a small potted plant. To the above poster: if you did it and got away with it you were extremely lucky the ceiling did not end up coming down!

If you really want to know how to engineer a suspension point I can offer up some advice privately.