Install Bottom-Support Rails - Cisco 8800 Series Hardware Installation Manual

Unpack and Install the Chassis
• Power supplies
• Fan trays
• Fabric cards
• Line cards
Leave the chassis on the pallet until you are ready to move and install the chassis in a rack.

Install Bottom-Support Rails

The bottom-support rails support the weight of the router chassis in the rack. To maximize the stability of the
rack, you must attach these rails at the lowest possible rack unit (RU).
Procedure
Step 1 Position the vertical rack rails at 32" depth to match with the length of the bottom-support rails. Check spacing
considerations.
• Maintain at least 21 RU (36.75 inches [93.34 cm]) for 8812 chassis and 16 RU (28 inches [71.12 cm])
Step 2 Attach the bottom-support rail to the rack using a Phillips torque screwdriver on M6 x 19 mm or 12–24 x 3/4
inch screws for each end of the rail (as shown in the following figure) and tighten each screw to 40 in-lbs (4.5
N-m) of torque.
Figure 8: Attach Bottom-Support Rails to a Rack
for 8808 chassis of vertical space above support rails.
Hardware Installation Guide for Cisco 8800 Series Routers
Install Bottom-Support Rails
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