As a door expert witness, I'm called upon often annually to gauge garage door injuries. Garage doors come in many shapes and sizes. Their functions range between basic security of a location to cosmetic concealment. Most doors could be broken down into a couple of basic styles or categories. Typical modern garage doors for residential applications are generally predominantly of the overhead sectional variety. That type of door comes in many configurations, materials, quantities of insulation, and a wide range of appearance possibilities. They're available as a prefabricated kit, or built as a custom design to complement the decor of any building. Commercial warehouse type installations often dictate higher security requirements. A great choice for this security kind of door could be the "roll-up" style that resembles a roll top desk kind of door. This door could be manufactured with a number of materials that is as strong as the adjacent walls, making forced entry through this opening very difficult. Other common commercial installations include light-weight aluminum single or sectional panel doors. These doors function more for closing off a currently secured area than for assuring point security. garage door repair spring
Previously, the greatest concern with operating an overhead garage door was the potential risks connected with the springs used for balancing the doorway weight. Pre mid 1960's garage door installations typically relied upon a set of stretched (tensioned) springs to assist the operation of the garage door pivoting hinges. These springs became loaded (tensioned) as the doorway was moved in to the closed position. Unloading (releasing) of the stored spring energy occurred as the doorway was opened to the horizontal overhead position. One of the very dangerous aspects of these spring systems was that after a time frame, often without any maintenance or inspection, the points of attachment of these springs would rust or become weak. This weakening of the springs or points of attachment would often cause an inadvertent explosive failure flinging the broken spring components across the garage, embedding the spring or steel components in to the garage walls, cars or other things in the path of travel. Unfortunately, sometimes individuals were in the path of travel of these explosive occurrences. As these springs failed, as an attempted safeguard, some manufacturers devised a "caging" system for the springs. These cages were retrofitted onto the stretched springs in an endeavor to recapture the parts that would release in case a failure occurred. While these caging devices were helpful, these were not completely effective. Many of these spring devices continue to be being used today. Whenever this problem exists or the caliber of garage components is questionable, a qualified professional service technician should be consulted. wayne dalton garage doors
In a reaction to the inherently dangerous old-style garage spring issues as above, a newer and safer system for opening the overhead garage door was created. The concept was to transfer the load or weight of the doorway using a cable and pulley system to a vertical rod now designed with a torsion (twisted) spring. This sort of spring is installed with specialty hardware and bolts to a fixed plate at one end, while the entire spring is installed around a horizontal pipe. This load balancing device is usually installed directly within the header of the garage opening. Using appropriate cables, connectors and pulleys, the weight of the garage door is transferred in to the torsion spring system. The difference between the old-style stretched spring and the newer torsion spring is the way that the spring energy is stored. With the old-style stretched spring, the power is stored and released by pulling on the spring or returning the spring to its un-stretched condition. With a torsion kind of spring, the power is imparted or removed by rotating the spring clockwise or counter clockwise based upon the direction of usage. With professional installation, the whole loading of the torsion spring is controlled by the garage installer, and is decided by the weight and size of the garage door that it is operating. When this kind of torsion spring fails, it remains attached and intact to the positioning on the horizontal control rod where it absolutely was mounted. I haven't been aware of or seen any torsion spring fly across a storage, creating injury from failed components as with the stretched older style garage door springs. This is not to say that injuries haven't occurred with the torsion style spring. The installing this kind of spring is generally safe when left to an educated garage door installation professional. Severe and serious injuries have occurred when untrained, unqualified individuals have attempted to install or service this kind of spring.