I am trying to install a garage overhead storage rack. I’ve made my pilot holes and when I was attempting the last pre drill I was not hitting the joist. I used the stud finder so I know I was centered on the joist.
It seems I may have hit metal, in fact I detected metal on my stud finder after the drill bit was not penetrating further. I looked above the ceiling from the attic opening but I do not see any metal obstruction that’s noticeable.
I see where the electrical wires are secured and running and this doesn’t seem to be any interference also. Unless there’s electric running on the bottom of the joist between the ceiling drywall and joist and can’t be seen? However I don’t think that’s code.
Is there metal between the joist and ceiling drywall? I don’t see any metal plate but I’m definitely hitting metal or something that is not the joist/wood and I don’t think it’s a nail or screw but I may be wrong. I’ve used the stud finder further down the ceiling along the same joist and I’ve detected metal (but still no obvious signs to the naked eye).
Can someone tell me what I may be hitting and the possible construction configuration of the ceiling that may answer my question. The other 3 pre drill pilot holes went fine. The last one of course is the failure. I’ve added some pictures below Greatly appreciate the help!