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1.2. Fasten the middle rail
Use the same procedure as for the upper rail, but
measure the distance from the upper rail and not
from the floor.
The distance between the lower edges of the
upper and middle rails is shown in the illustration.
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Remember that all rails must be level,
and accurately centered around the system's vertical center line.
1.3. Fasten the bottom rail
Use the same procedure as for the upper rail, but
measure the distance from the middle rail and not
from the floor.
The distance between the lower edges of the
middle and bottom rails is shown in the illustration.
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