There is a mistaken belief that the lifting is done by the door opener. Nevert…


There is a mistaken belief that the lifting is done by the door opener. Nevertheless the actual lifting is done by the springs. When the door is closed the springs enter stress. When the door is being opened the spring does the majority of the lifting. There are two types linear growth springs and torsional springs. Garage door openers are of 2 types, jackshaft type and trolley type. #garageremodeltobedroom

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