Figure 2 Verifying Equipment Rack Dimensions
Mounting flanges 
Minimum usable
aperture 17.7 inches 
(45.0 cm)
Hole centerline
to hole centerline
18.31inches ± 0.06 inches (46.5 cm ± 0.15 cm)
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Installing the Chassis Installation Brackets
Each chassis is shipped with two chassis installation brackets in the accessory kit. These brackets are to aid in installing a chassis into a 19 inch rack and used as a support base to vertically position and set the chassis before the
To install the chassis installation brackets into a rack, complete the following steps:
Step 1 Determine where in the rack you want the chassis to be mounted. If you are mounting more than one chassis in the rack, then start from the bottom up or the center of the rack. Install the chassis installation bracket where the chassis bottom will be positioned vertically in the rack.
Step 2 Secure the chassis installation bracket to the front rails with the
Step 3 If there is a second internal rack rail, which is not more than 20 inches from the front rail, you can position the second installation bracket to act as a rear support for the chassis during installation.
Figure 3 shows the brackets attached in a rack.
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