BROKEN DOOR MOUNT or HEADER MOUNT
Door Mount: Some garage doors are installed equipped with a standard small door mounting bracket without vertical struts and some are actually even installed without either. It connects the two-arm of your opener to the garage door top panel connected by a cotter pin. Over time and usage stress is placed in the small area of the top of your door where this door mount is located causing your door panel to flex, bend, or split.
To save your door from this problem, a heavy duty Operator Reinforcement Bracket is recommended in place of the standard door mount. It may be a necessary accessory to help prevent dents/cracks to your top panel during their job in pulling up or pushing down the garage door in motion, especially for a double garage door with windows.
Replacing the standard or missing mount will help extend the life of your door panel and make your garage door operate smoother.
Header Mount: In some garages the header mount that holds the center bearing plate for the torsion bar can give up its strength over time. In some cases the center bearing plate was not properly installed on a stud or not installed on a stud. If this happens the torsion bar holding the springs will cave down hanging by the end brackets, collapse on top of the top panel if the door is closed or rest on top of the last panel if it happened while the door was in open position.
If this happens in your garage, it is best to leave it alone and have a professional remount the header bracket properly on a new stud. After remounting, the door will need to be rebalanced by putting correct amount of tension on your springs. Garage door torsion springs have an extreme amount of tension, and without proper training and experience, can cause severe injury to anyone attempting to do it and damage to the garage.