Will bedroom ceiling joist be strong enough to hold a punchbag?
The ceiling joist will probably hold the bag unless it is very heavy, until you hit it the first time. Ceiling joists are meant to handle a vertical load, but when you hit the bag you will give it a horizontal load. That will cause it to twist. Twisting is not good. That will ruin the ceiling. The joist has less resistance to twisting than to sagging. Also, your only access to the ceiling joist is using a lag screw, unless you remove part of the ceiling. This concentrates the load on a remarkably small section of wood. This could end up coming out after a bit. The penalty for ruining a ceiling and joist can be replacing a ceiling. That can cost anwhere from several hundred to several thousand dollars. if you were a small kid, with a little punchbag, then there woudn’t be a problem. My guess is that you are older and want a serious punch bag for some real use. You might consider putting a bridge between two joists to distribute the load. This will roughly double the stiffness of the sup
