Home / Garage Doors / 42 Astounding Liftmaster Garage Door Opener Troubleshooting Image Design / Astounding Liftmaster Garage Door Opener Troubleshooting Image Design Craftsman User Guide Manualsonline
Alexandrin Garage Doors October 14th, 2017 - 22:20:20
In contrast to an overhead type of garage door be it sectional or single panel roll up doors have a totally different type of operating system. When these doors are used they can be concealed in an overhead or under mounted trough. These doors operate similarly to a roll top desk door except for how they are stored when not in the closed position. They normally coil as they are retracted and require significant gear trains to reduce the effort required to move these doors up and down into position. Often the forces needed to move these roll up doors require a reduction type of transmission that allows a very heavy door to be operated effortlessly.
They are available as a prefabricated kit or built as a custom design to complement the dacor of any building. Commercial warehouse type installations often dictate higher security requirements. A good choice for this security type of door is the "roll-up" style that resembles a roll top desk type of door. This door can be manufactured with a variety of materials that can be 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.
Garage doors can be operated manually (by hand) as well as automatically (by power assisted motor). In both cases the proper operation of the garage door is determined by the proper balancing of the garage door weight springs and related component hardware. An automatic power assisted motor cannot overcome an improperly balanced garage door. The weight of all garage doors is normally deceptive. Due to the fact that a properly functioning door appears easy to open and close many users do not realize the combined overall weight until springs fail to assist the door in its operation. In all cases regardless of the type of garage door the entire system of hinges track hardware and door opener work as a team. Problems with misalignment shifting or jamming can lead to problematic operation of a door. Counter forces imparted to a garage door not engineered into the components can lead to injury. Inappropriate maintenance or complete lack of maintenance has lead to severe bodily injuries. Forcing the operation of a garage door when one or more components have become damaged or broken has lead to serious bodily injuries. In all cases maintenance is a crucial and important aspect of proper operation of all door systems.
In the past the biggest concern with operating an overhead garage door was the potential risks associated with the springs used for balancing the door weight. Pre mid 1960s garage door installations typically relied upon a pair of stretched (tensioned) springs to assist the operation of the garage door pivoting hinges. These springs became loaded (tensioned) as the door was moved into the closed position. Unloading (releasing) of the stored spring energy occurred as the door was opened to the horizontal overhead position. One of the most dangerous aspects of these spring systems was that after a period of time often without any maintenance or inspection the points of attachment of these springs would rust or become weak.