As a door expert witness, I am called upon often a year to judge garage door injuries. Garage doors can be found in many shapes and sizes. Their functions range from basic security of a place to cosmetic concealment. Most doors can be broken on to a couple of basic styles or categories. Typical modern garage doors for residential applications are generally predominantly of the overhead sectional variety. That design of door is available in many configurations, materials, quantities of insulation, and a wide selection of appearance possibilities. They are available as a prefabricated kit, or built as a custom design to check the decor of any building. Commercial warehouse type installations often dictate higher security requirements. The ideal choice with this security form of door is the "roll-up" style that resembles a roll top desk form of door. This door can be manufactured with a variety of materials that is often as strong while 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 an already secured area than for assuring point security. door garage price
In the past, the greatest concern with operating an overhead garage door was the potential risks related to the springs employed for balancing the entranceway weight. Pre mid 1960's garage door installations typically relied upon a couple of stretched (tensioned) springs to assist the operation of the garage door pivoting hinges. These springs became loaded (tensioned) as the entranceway was moved into the closed position. Unloading (releasing) of the stored spring energy occurred as the entranceway was opened to the horizontal overhead position. One of the very most dangerous areas of these spring systems was that after a time frame, often without the 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 result in an inadvertent explosive failure flinging the broken spring components throughout the garage, embedding the spring or steel components into the garage walls, cars or other things in the road of travel. Unfortunately, sometimes everyone was in the road 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 could release in case a failure occurred. While these caging devices were helpful, they certainly were not completely effective. Many of these spring devices remain in use today. Whenever this condition exists or the caliber of garage components is questionable, a qualified professional service technician should be consulted. garage door motor repair
In a reaction to the inherently dangerous traditional style garage spring issues as above, a more recent and safer system for opening the overhead garage door was created. The idea was to transfer the load or weight of the entranceway via a cable and pulley system to a straight rod now built with a torsion (twisted) spring. This kind of spring is installed with specialty hardware and bolts to a fixed plate at one end, while the whole spring is installed around a horizontal pipe. This load balancing device is generally installed directly within the header of the garage opening. Using appropriate cables, connectors and pulleys, the weight of the garage door is transferred into the torsion spring system. The difference involving the traditional style stretched spring and the newer torsion spring is the way that the spring energy is stored. With the traditional style stretched spring, the vitality is stored and released by pulling on the spring or returning the spring to its un-stretched condition. With a torsion form of spring, the vitality is imparted or removed by rotating the spring clockwise or counter clockwise based upon the direction of usage. With professional installation, the entire 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's operating. When this kind of torsion spring fails, it remains attached and intact to the positioning on the horizontal control rod where it had been mounted. I have not 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. That is not to imply that injuries have not occurred with the torsion style spring. The installing this kind of spring is generally safe when left to an experienced garage door installation professional. Severe and serious injuries have occurred when untrained, unqualified individuals have attempted to set up or service this kind of spring.