Allied Telesis AT-SBx3106WMB - Manual (Page 27)

AT-SBx3106WMB Wall Mounting Brackets Installation Guide
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31.0 cm (12 in.) to 15.0 cm (6 in.).
 If you are installing the chassis on wallboard, be sure to position
the screw holes over the centers of the studs in the wall. If you
have not already done so, use a stud finder to locate the studs. For
additional recommendations, refer to “Wallboard Requirements” on
page 16.
Caution
Do not install the chassis on a wall that has metal studs. Metal studs
may not be strong enough to safely support the chassis.
2. After positioning the bracket on the wall, use a pen or pencil to mark
the wall with the locations of the two screw holes in the bracket. Refer
to Figure 9.
Figure 9. Marking the Screw Holes for the Top Bracket
3. Measure 50.6 cm (19 7/8 in.).vertically down from the hole marks you
made in the previous step and mark the two screw holes for the bottom
bracket. Refer to Figure 10 on page 28.