What is the function of the cable that is attached to the bottom of each side of the garage door?

The cable attached to the bottom of each side of the garage door serves a pivotal role in guiding the door during its opening and closing operations. As the door operates, the cables work in conjunction with the pulley system to maintain proper alignment and functionality. They help prevent the door from swaying or twisting, which could lead to operational issues or damage. Proper guiding is essential for ensuring the door opens and closes smoothly along its tracks.

In contrast, while structural support, tension adjustment, and remote control operations are significant aspects of garage door functionality, they are not the primary purpose of these cables. Structural support is typically provided by the door panels and frame itself, tension adjustment is accomplished via the springs of the garage door system, and remote control operations involve the opener and its associated mechanics rather than the cables that are specifically there to assist with movement.