About to mount a chin up bar on the ceiling in the garage. Total weight on this bar could be as much as 300 lbs. Got up in the attic to look at the spacing of the ceiling joists and they are 1.5 x 6 inches and 24 inches apart. The joists span the width of the 2 1/2 car garage without any other joists that would criss cross them to add support. There are 2 very long 2 x 4 tie ins criss crossing the joists and nailed to the tops of the joists but they don't look like it provides any real support. Not sure what their purpose is. As you might can tell, I have very limited knowledge of construction techniques. Are the joists strong enough to support the weight mentioned? Thanks, Barry

I have bathroom with a plastic shower stall. Above the stall is painted wallboard like the rest of the walls in the bathroom. The shower pipe comes out above the stall. At some point the head leaked and started backspraying onto the wall, and the paint, the tape above wall/stall connection, and the wallboard paper all started to peel. How to repair? Does the wallboard need to be replaced?