Toa FS-971 SERIES - Manual (Page 36)

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9.1. Notes on Parallel Rack Installation
9.1.1. Securing racks installed side by side
Two knock-out holes (ø12 mm) are provided on each side of the rack. Break these holes using a screwdriver,
and secure racks to each other with M8 bolts and nuts.
9.1.2. Adjusting the rack height
(A standard screwdriver is required to adjust the height.) When multiple racks installed on the floor are
unstable, adjust their height and secure levelness by turning clockwise the height adjustment screw located at
the rack base front.