Installing The T320 Mounting Hardware For A Four-Post Rack Or Cabinet; Table 18: T320 Four-Post Or Cabinet Rack Mounting Hole Locations - Juniper T320 Hardware Manual

T320 Core Router Hardware Guide
Related
Documentation

Installing the T320 Mounting Hardware for a Four-Post Rack or Cabinet

60
In an open-frame rack, center-mounting is generally preferable to front-mounting because
the more even distribution of weight provides greater stability. If you center-mount the
chassis, you use the center-mounting brackets attached to the chassis; if you front-mount
the chassis, you use the front-mounting flanges.
If you are mounting the router in a four-post rack or cabinet, you must install the spacer
bars on the rack before you mount the chassis. For instructions about installing the
mounting hardware, see "Installing the T320 Mounting Hardware for a Four-Post Rack
or Cabinet" on page 60 or "Installing the T320 Mounting Hardware for an Open-Frame
Rack" on page 63, depending on your type of installation.
After the mounting hardware is installed, proceed to "Installing the T320 Router Using
a Mechanical Lift" on page 68 or "Installing the T320 Chassis in the Rack Manually" on
page 81, depending on your type of installation.
T320 Chassis Description on page 12
T320 Clearance Requirements for Airflow and Hardware Maintenance on page 51
Verifying the T320 Router Parts Received on page 55
To prepare to install the T320 router into a four-post rack or cabinet:
Install cage nuts, if needed.
Install the large mounting shelf and spacer bars on the front rail.
Install the small mounting shelf on the rear rail.
Remove the center-mounting brackets from the chassis.
Table 18 on page 60 specifies the holes in which you insert mounting screws (an
a mounting hole location), and cage nuts if needed. The hole distances are relative to
one of the standard U divisions on the rack. The bottom of all mounting shelves is at
0.0015 in. (0.01 U) above a U division.

Table 18: T320 Four-Post or Cabinet Rack Mounting Hole Locations

Hole Distance Above U Division
42 24.26 in. (61.6 cm)
33 19.01 in. (48.3 cm)
24 13.76 in. (34.9 cm)
15 8.51 in. (21.6 cm)
12 6.76 in. ( 17.1 cm)
Large
Shelf
13.86 U –
10.86 U –
7.86 U –
4.86 U –
3.86 U –
Copyright © 2010, Juniper Networks, Inc.
X indicates
Spacer Small
Bars Shelf
–
X
–
X
–
X
X X
–
X