As a home expert witness, I'm called upon often times annually to gauge garage door injuries. Garage doors can be found in many shapes and sizes. Their functions range between basic security of a place to cosmetic concealment. Most doors can be broken on to a few basic styles or categories. Typical modern garage doors for residential applications are generally predominantly of the overhead sectional variety. That style of door is available in many configurations, materials, levels of insulation, and a wide selection of appearance possibilities. They're 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 because of 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 number of materials that is often 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 an already secured area than for assuring point security. replacement garage door prices
In the past, the greatest concern with operating an overhead garage door was the potential risks related to the springs useful for balancing the doorway weight. Pre mid 1960's garage door installations typically relied upon a set of stretched (tensioned) springs to aid the operation of the garage door pivoting hinges. These springs became loaded (tensioned) as the doorway was moved 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 most dangerous aspects of these spring systems was that if a period of time, 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 cause an inadvertent explosive failure flinging the broken spring components throughout the garage, embedding the spring or steel components to the garage walls, cars or other items in the road of travel. Unfortunately, sometimes everyone was in the road of travel of these explosive occurrences. As these springs failed, being 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, they certainly were not completely effective. Some of these spring devices are still in use today. Whenever this disorder exists or the grade of garage components is questionable, a qualified professional service technician must be consulted. contemporary garage doors
In response 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 strain or weight of the doorway using a cable and pulley system to a straight rod now equipped with a torsion (twisted) spring. This type 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 usually installed directly within the header of the garage opening. Using appropriate cables, connectors and pulleys, the weight of the garage door is transferred to the torsion spring system. The difference between the traditional style stretched spring and the newer torsion spring is just how 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 dependant on the direction of usage. With professional installation, the whole loading of the torsion spring is controlled by the garage installer, and is determined by the weight and size of the garage door that it is operating. When this sort of torsion spring fails, it remains attached and intact to the location on the horizontal control rod where it absolutely was mounted. I haven't been aware of or seen any torsion spring fly across a garage, creating injury from failed components just like the stretched older style garage door springs. This really is not saying that injuries haven't occurred with the torsion style spring. The installing of this sort of spring is generally safe when left to a skilled garage door installation professional. Severe and serious injuries have occurred when untrained, unqualified individuals have attempted to set up or service this sort of spring.