Commercial doors are the same physics as residential doors with a lot more weight and a lot more cycles, so the failures are the same list with higher stakes.
Springs. A commercial door cycling dozens of times a day burns through spring life fast. When one breaks, the door becomes dead weight and the opener cannot lift it. Do not keep running the operator against it.
Off-track doors. Usually a forklift, a truck or a delivery driver caught the door. The door binds, the rollers pop the track, and if somebody keeps hitting the button the panels bend.
Cables. Frayed or snapped cables let one side of the door drop. This is the failure most likely to hurt somebody, and it is visible well before it lets go if anyone is looking.
Panels and crashed doors. Impact damage is routine in a busy dock environment. Sometimes a single panel replacement puts it right, sometimes the section is bent enough that replacing it is the honest answer. We will tell you which.
Track and rollers. Worn rollers and spread track make a door loud, slow and hard on the operator. It is also the cheapest thing on this list to correct before it damages something expensive.
We run emergency commercial repairs, and when a door is stuck open the building is unsecured, so we treat that as urgent rather than as a next-available appointment.
