I just had a ceiling put in my garage using I-Joists 11 7/8". I can find plenty of information for running wires perpendicular to the I-Joist BUT can not find anything about installing ceiling elect boxes, running wires parallel to I-Joist and mounting Garage door opener.

Hear are my questions:
1) Can a electrical box just be screwed to the side of the bottom I-Joist flange ?

2) When running wire parellel to I-Joist can wire staples be used in the top an bottom flange ?

3) How does the garage door hardware get mounted. I would thing a lag bolt would be to much for the bottom flange. Should blocking be put between the I-Joist and the Lag bolts be put in it ?

Thank You in advance