This 8x7 garage door had cracks and did not have a strut on the top section. Many companies do not attach a strut to 8x7 doors....I'm not exactly sure why they don't do this especially when there is a garage door opener attached. The opener will pull on that top stile and eventually rip the rivots out, that can be prevented with a strut on the top section. The bottom section of this door also was  a bit bowed out because a car was backed into it. A second strut was placed on it to pull the panel straight.

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We can replace the springs in your box truck......its basically the same thing as a residental garage door. Only difference is that some of the  parts are welded together and they are smaller. Here are some Photos:

Garage Door Springs
Oil Tempered Wire vs. Galvanized

By Walt Weller

I had the good fortune of becoming involved in the garage door industry in 2003 when my partner and I acquired General Spring LLC. It didn’t take long before we began to hear about—and field—questions regarding oil tempered wire vs. galvanized wire relative to the manufacture of garage door torsion springs. This topic inspires much discussion, and there seems to be two definite and distinct camps in this ongoing debate. My purpose here is not to take one side or the other, but to present information which allows you, the reader, to make your own decision.

Garage Door Strut Repair........whoever originally installed the garage door, attached the j-arm of the garage door opener to a place with no reinforcement stile.....so over time the top strut and panel bent....luckily the panel from outside did not look damaged so we just replaced the strut and moved the garage door opener over a bit so it would line up with a reinforcement stile......the garage door worked smooth after that....

This is a garage door installation done in Poway, Ca. The garage door is the Clopay Brand with a Liftmaster 1/2 HP Belt Drive Motor. The Belt drive motor is probably the smoothest, most quiet garage door opener you can buy.

This is a short clip showing a stripped gear inside a Chamberlin liftmaster. You can usually tell your gear is stripped in your Liftmaster or Craftsman motor if you hit the remote control or push button and the motor is turning but your door won't go up. This is usually caused by a door that is improperly balanced.
A heavy door will wear out your gears.....every time I run into this situation its usually a heavy door. So the remedy for this is to replace the gears.....there are 2 major plastic gears inside the smaller one never looks stripped but it should be replaced anyway.

This is video of some old school 1-piece hardware and Springs. In some cases the hardware is so old it would be difficult if not impossible to find replacement parts or springs.  This was the case with this garage door. The wood of the garage doors was still good and the garages where out back and out of view.  So it made sense to replace the hardware instead of spending the money on new steel sectional doors.