T4000 Clearance Requirements For Airflow And Hardware Maintenance; Figure 30: Typical Open-Frame Rack - Juniper T4000 Hardware Manual

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T4000 Clearance Requirements for Airflow and Hardware Maintenance

Copyright © 2013, Juniper Networks, Inc.
The chassis height of 37.45 in. (95.1 cm) is approximately 21.4 U. A U is the standard rack
unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number
EIA-310-D) published by the Electronics Industry Association. You can stack two routers
in a rack that has at least 42.8 U (74.9 in. or 1.90 m) of usable vertical space.
The rack must be strong enough to support the weight of the fully configured router, up
to 606 lb (275 kg). If you stack two fully configured routers in one rack, it must be capable
of supporting about 1212 lb (550 kg).

Figure 30: Typical Open-Frame Rack

Always secure the rack to the structure of the building. If your geographical area is subject
to earthquakes, bolt the rack to the floor. For maximum stability, also secure the rack to
ceiling brackets.
T4000 Router Physical Specifications on page 331
T4000 Clearance Requirements for Airflow and Hardware Maintenance on page 59
When planning the installation site, you need to allow sufficient clearance around the
rack (see Figure 31 on page
Chapter 5: Preparing for T4000 Router Installation
60):
59