I mounted this pull up bar to a 3.5" x 12" beam that runs along the middle of the garage ceiling (it's actually two 1.75" x 12" planks attached together). I used six evenly spaced 0.375" x 2.5" lag screws to mount the pull up bar, as instructed by the manufacturer.The mounted bar feels solid under load, but I've been hearing some slight creaking and noticed a tiny bit of torsional flex. That, coupled with the fact that the garage is pretty old, has made me a bit paranoid. Any thoughts would be much appreciated.Here is an album of pictures of the garage beam and mounted bar. via /r/DIY http://bit.ly/2Iu7euP
