3Com CoreBuilder 9000 Quick Installation Manual page 7

WARNING: The chassis has two stationary, preinstalled flange pins
(Figure 5) located between the first Telco and Metric rack slots. Use
these flange pins only to help position the chassis. Do not use these
pins to support the full weight of the chassis.
Figure 5 CoreBuilder 9000 7-slot Chassis Flange Pin and Rack Slots
Preinstalled
flange pin
Telco rack
open slot
Metric rack
closed slot
WARNING: When the CoreBuilder 9000 chassis is fully loaded with
modules and load-sharing power supplies, the chassis weighs
approximately 38.56 kg (85 lb). Therefore, for a rack installation, install
your chassis before you install modules and power supplies. Continue
to support the chassis until after you have securely installed at least
four of the eight screws (two screws per rack-mount flange) for the
chassis.
If you attempt to place the weight of the rack-mounted chassis on
fewer than four fully inserted screws, the chassis may drop off the rack.
Personal injury or serious damage to the chassis may result.
7-Slot Chassis Quick Installation Guide
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