Finding the correct amount of high-lift track to install is fairly easy to calculate. Since the spring line on a high lift assembly uses about 12 inches of space we need to subtract that amount from our high-lift garage door track calculation. High lift applications use special drums that are much larger than standard lift drums in most instances. If you don’t give the drums enough space they will scrap against the ceiling during operation. The formula for calculating the maximum amount of high lift you can use is (Floor to Ceiling Height) – (DOOR Height) – (12 inches) = (Maximum High Lift)
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