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This suspension method is economi-
cal and simple to install requiring a
minimum of tools. A single or double
cable is strung between the walls over
the duct to support it along its full
length. Plastic snap hooks situated at
12:00 o'clock on the duct clip onto
the cable when using a single suspen-

sion method. A double suspension
method requires the snap hooks to be
positioned at 3:00 and 9:00 o'clock.
While this suspension system has a
lower initial cost, the labor required
to remove the duct for cleaning,
laundering and subsequent re-instal-
lation is higher than the two other
suspension systems.