The anchor of the header bracket securing the garage door opener's rail to the concrete wall above the garage door came loose over time and with vibrations (details in a previous question).
What is a good long-term solution for mounting the header bracket, and allowing for future changes (in case of changing door openers, etc)?
One suggestion is to anchor a ~24" length of a 2x6" beam to the concrete, then screw the header bracket to the beam. Other suggestions are welcomed as well.
For concrete anchors for the above idea, what 1) type, 2) embedment depth, 3) diameter, and 4) spacing/number/pattern should be used, appropriate for the vibrating load of a garage door opener?
I believe the wall is poured concrete, with 1-2 cm of parging on the surface. I already have on hand some lead anchors / lag shields, #16-18 x 1-1/2". I have rotating drills, but not hammer drills.