Do you know that the final weight of a garage door can easily reach 400 pounds or more? This is why you need to be sure that the overhead track is well supported and in perfect alignment. If the door comes out of the track might fall on your car. You need to pay special attention to the suspension system. Most of them are perfectly adapted so that they can be manually opened halfway and then just stay in that position. However in some cases it could be a real problem as they get stuck and cannot be closed or…