While the modern garage door system has a great deal of moving parts, there are basically two primary parts– the garage door and the garage door opener. Many garage doors in use today are the overhead type– the door rolls up overhead along a track system.
One thing is for certain, lifting the typical overhead garage door needs muscle– either the human kind or with the lifting power provided by a series of counterbalanced cables and springs.
Springs: The Real Muscle Behind Overhead Garage Doors
Generally built of wood, today’s doors are offered in steel or fiberglass options. Regardless of the construction product made use of, the included insulation constructed in to modern garage doors contributes to the general weight, with some doors weighing in at 300 pounds or more. That’s where the demand for muscle can be found in.
If your overhead garage door system uses torsion springs, you’ll see a series of cables connected to the bottom of your garage door running up to a cable drum on either end of the spring shaft. The springs are mounted to this shaft, with a cone at each end– one a stationary cone which is connected to the center plate, and the various other a winding cone which winds the spring.
When the door control is set to “open,” the springs relax and the built up stress turns the shaft with its cable drums. As the drums are rotated, the cables are wound around the drums and the garage door is raised. Setting the door control to the “close” position causes the cable televisions to unwrap from the drums and the springs rewind to full stress.
An extension spring system can be mounted in one of two ways– either on both sides of the garage door, or simply above the door tracks. A series of pulleys and counterbalance cable televisions link the garage door to the springs, providing the lifting power essential to close the door and open.
When the door “open” control is selected, the springs are contracted; the door opens as the tension on the springs is launched. To “close” the door, the springs are extended, or extended, and the resulting stress closes the door.
Typically, garage doors are opened and closed 1,500 times each year; this is called a “cycle.” Larger, more energetic households who use the garage door more frequently will break the springs quicker and will should have them changed more typically.
The Convenience of a Garage Door Opener
Garage door openers enable you to quickly open and close your doors without having to leave your automobile, or for that issue, do anything even more than touch a button.
The opener’s electric motor is linked to either a chain or belt carriage that links in turn to the door. When opening the door, the motor provides the “pull” that gets the door relocating towards its upward position. To close the door, the motor is reversed– causing the door to be pulled the other way to a shut position.