I need to mount a ceiling fan to a ceiling joist in a sloped ceiling. I recently installed an electrical box onto the joist for this. The problem I have now is that the ceiling fan bracket is intended to be bolted left-to-right whereas the mounting holes on my electrical box are top-to-bottom along the joist.
If I mount the fan bracket vertically, the little key, which needs to be at the bottom of the bracket, is on the left side (see pic below). I don't think that mounting the bracket sideways is an option given the way that the joist and box are oriented. So should I modify the bracket - by attempting to hacksaw off the key and JB weld it onto the bottom (best idea I can think of)? Any other ideas?
Mounting bracket with key on the left (normally on bottom).