Installing an overhead garage door requires a few tools and a friend to help.
How to install overhead garage door.
Slant or slightly bend the nails to secure them in place.
Release the tension on side mounted extension springs by lifting the door and locking it in place on each side with a pair of locking pliers.
Tie the extension spring to the roller track then detach the cable from the bottom bracket with a pair of pliers.
The remaining panels and tracks are held in place with hinges brackets and screws.
Set the bottom piece into position insert the bottom piece into the door frame and use a level to properly set the piece.
Once the piece is in place tap nails partway into each jamb.