Like most industries, the garage door industry comes with its own terminology. It can be helpful during a new garage door installation or a garage door repair service call, to know what various terms mean. Below are a few of the more common garage door terms.
Common Garage Door Terminology
- Bottom Brackets – These brackets are installed at the bottom of the door, on the left and right side. The lift cables are attached to the bottom brackets. Due to the high tension that the lifting system is under, do not remove these brackets. Call a garage door expert if you experience problems with the bottom brackets.
- Clearances – The amount of room, (side, back and head room), needed to properly install a sectional garage door.
- Extension Springs – Counterbalanced springs that provide the lifting power. They are mounted to the rear track hangers and are attached to a pulley at the other end of the spring. Springs should only be installed and removed by a garage door specialist.
- Torsion Springs – Another type of spring system that is mounted above the door opening. They are loosened and tightened by the cables as they wind around the drum when the door is opened and closed. They are typically longer lasting than extension springs.
- Rollers – The wheel part of the roller assembly which allows sections to roll freely long the door tracks.
- Trusses – U-shaped metal reinforcements that attach to the inside of the door to add strength. They are necessary on wide, heavy doors to help prevent bowing and to provide additional reinforcement.
- Operation Cycle – The movement of the door from the closed position to the open position and back to the closed position. The longevity of the spring is measured in cycles. For example, a spring with a life of 10,000 cycles indicates more than 13 years of operation with 2 cycles per day. Since most open and close their garage door more than two times a day, the average spring lasts between 7 and 12 years. Keeping the garage door spring lubricated, can help extend its life.
- Lift Cables – Lift cables are used to raise and lower the garage door.
- Safety Cables – Safety cables are used with extension springs. They are inserted in the spring, so if the spring should break, the cables keep the broken spring in place.
- Sensor – For safety reasons, sensors are required by law. They are mounted six inches above the ground in the doorway and will cause the door to reverse direction if there is an obstruction.