Juniper MX960 - Spacing of Mounting Bracket Holes; Connection to the Building Structure; Clearance Requirements for Airflow and Hardware Maintenance for the MX960 Router

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The rack must be strong enough to support up to 374 lb (169.64 kg). If you stack two fully configured
routers, it must be capable of supporting up to 748 lb (339.28 kg).
Spacing of Mounting Bracket Holes
The holes within each set are spaced at 1 U (1.75 in. or 4.5 cm). The router can be mounted in any rack
that provides holes spaced at those distances.
The router can be mounted in any rack that provides holes or hole patterns spaced at 1U (1.75 in.)
increments. The mounting brackets and front-mount flanges used to attach the chassis to a rack are
designed to fasten to holes spaced at those distances.
Connection to the Building Structure
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.
RELATED DOCUMENTATION
Clearance Requirements for Airflow and Hardware Maintenance for the MX960 Router | 185
MX960 Rack-Mounting Hardware | 16
MX960 Cabinet Size and Clearance Requirements | 187
MX960 Cabinet Airflow Requirements | 188
Clearance Requirements for Airflow and Hardware Maintenance for the
MX960 Router
When planning the installation site, you need to allow sufficient clearance around the rack (see
Figure 47 on page 187):
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For the cooling system to function properly, the airflow around the chassis must be unrestricted.
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For service personnel to remove and install hardware components, there must be adequate space at the
front and back of the router. At least 24 in. (61 cm) is required both in front of and behind the router.
NEBS GR-63 recommends that you allow at least 30 in. (76.2 cm) behind the router.
Airflow must always be from front to back with respect to the rack. The device must not interfere with
the cooling of other systems in the rack. Fillers must be used as appropriate in the rack to ensure there
is no recirculation of heated exhaust air back to the front of the rack. Care must also be taken around
cables to ensure that no leakage of air in situations where recirculation may result.
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