Lucille. Garage Doors. October 11th , 2017.
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.
These doors can be chain driven either manually, or can be automated using electric motors. Roll up doors require more frequent evaluation and servicing than a standard overhead garage door. The tracks that are mounted vertically on both sides of the garage opening need maintenance and cleaning more frequently, and are often blocked by foreign obstructions or damaged by collision of some type. These roll up doors are often held open by some type of ratcheting action. Proper balancing of these doors is often more important than an overhead type of door, as the weight of these type of doors is normally much greater than an overhead door.
I have been involved in numerous garage door lawsuits where many different reasons for an injury have occurred. Having been retained as expert witness for both plaintiff and defense, several common factors have been observed. In many cases, unqualified individuals have attempted to repair or install garage doors. They have lacked the knowledge, skills or even the basic required tools to perform the work safely and properly. I have been hired as an expert by garage door manufacturers and installers to defend claims that they are not responsible for alleged product defects. In most cases, the components that failed, failed as a result of abuse or improper installation on the part of the end user. As stated above, the installation of many garage doors is not appropriate for an untrained person.
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.
LiftMaster® is the most popular brand from Chamberlain. This range also includes the Liftmaster garage door opener remotes, replacement parts, mini transmitters, keychain remotes and other accessories. LiftMaster garage door openers are available in different drive and horsepower modes and are combined with a wide range of accessories and options. The LiftMaster range contains: the Estate Series, the Premium series and the Contractor series. These are available in the belt drive; screw drive as well as in chain drive models.
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