Learn to replace support struts on a garage door with this ‘how to’ guide. The bar is a strut and helps prevent the top section from warping, especially when you have a garage door opener. Sometimes the strut will become damaged or become rusty requiring replacement. You must measure your door width when replacing the top strut on the garage door. This ensures you purchase the correct size. Replacement struts are available at home improvement centers and garage door dealers.
Pull the garage door down all the way and engage the lock bar. If you have an opener, close the door with the remote or push button station. Disconnect the power cord from the ceiling outlet to prevent someone accidentally using a remote to open the door while you are working.
Loosen and remove the screws securing the bottom edge of the strut, starting at each end and working your way to the center. Remove the center screw while holding the center of the strut. Pull the strut away from the door.