Vertical Mounting Hole Pattern - Acer AT350 F2 Series Service Manual

Vertical mounting hole pattern

The four vertical rails of the system rack contain mounting holes arranged
in a manner shown in the figure below:
The system occupies 5U in the rack. Count the U positions and hole
numbers from the bottom up.
The distance from the center of two holes with closer spacing to the center
of the next pair is equivalent to 1U.
Note: The unit of measurement used in this guide is "U"
(1U = 1.75 inches or 44.45 mm). The total sum of the heights of all
components in the rack measured in "U" cannot exceed the height of
the rack. For more information, refer to the documentation that came
with the system rack.
When installing components, you must start your measurement from the
center of the two holes with closer spacing. Otherwise, the screw holes on
the component may not match those on the rack.
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