Alita. Garage Doors. October 19th , 2017.
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.
Chamberlain GmbH based in Saarwellingen, Germany is a principal supplier of residential garage door openers, commercial and residential gate operators, and remote controls in the world. The company has offices in France, England, the Netherlands, Poland, Slovak Republic and Singapore. Chamberlain products are available almost across the whole world. Chamberlain offers garage door openers in commercial as well as residential varieties. Chamberlain®, Whisper Drive® and Power Drive® Garage Door Openers are the most popular brands from Chamberlain.
An exception to this relates to "do it yourself" garage door kits that are sold at local home centers. A homeowner could install the door because these kits do not come with a professional quality package of hardware that should or would require special knowledge for the installation. These kits do not typically employ torsion springs that would require special knowledge, proper tools, and working skills to install. The doors are typically for light duty use. Professional installation services are often available through a home center to assist a homeowner in need of a specialized installation. As with most trade specific tasks, years of experience working as a professional installer qualifies tradesmen for their contracting license. The average homeowner watching a few television shows that give rough explanations of how to install garage doors is not usually qualified to install his or her own door. These "how to" television shows are no substitute for the many skills acquired after working in the field.
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.
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.
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