The history of the garage door could date back to 450 BC when chariots were stored in gatehouses, but in the U.S. it arose around the start of the 20th century. As early as 1902, American manufacturers—including Cornell Iron Works—published catalogs featuring a "float over door." Evidence of an upward-lifting garage door can be found in a catalog in 1906.
Another key safety feature to prevent entrapment from garage doors is the “electric eye” sensor system found on many more modern garage door systems. Sensors placed on either side of the garage door’s track system about 4 to 6 inches off the ground transmit an infrared beam of light during a door’s closing operation. Should anything break the beam during the closing operation – including adults, pets or other objects – the opener should automatically stop and reverse the closing operation.
Our technicians are specially trained to handle a variety of garage brands, styles, and configurations. After arriving at your home, a Sears technician will diagnose the problem and walk you through the options for fixing it. Next, the technician will make any necessary adjustments or replace broken parts to ensure the door can be operational once again. We always attempt to complete repairs the same day of service, and your satisfaction is guaranteed. Our representatives are standing by for your call and are happy discuss pricing options.
An extension spring counterbalance system consists of a pair of stretched springs running parallel to the horizontal tracks. The springs lift the door through a system of pulleys and counterbalance cables running from the bottom corner brackets through the pulleys. When the door is raised, the springs contract, thus lifting the door as the tension is released. Typically these springs are made of 11 gauge galvanized steel, and the lengths of these springs are based on the height of the garage door in question. Their lifting weight capacity can best be identified by the color that is painted on the ends of the springs.
In this article, we’ll tell you the difference between a safe door and one that’s unsafe. We’ll also give you the helpful tips you’re not likely to find in the manufacturer’s instructions to correctly, and safely, install a new garage door with a torsion spring and do-it-yourself tensioning. Installing a new, double garage door yourself will save you several hundred dollars and should take eight to 12 hours if you’re fairly handy. You can do most of the new garage door installation project yourself, but you should recruit help for removing the old door.