Juniper MX240 Hardware Manual page 81

Table 19: Rack Requirements and Specifications for an MX240 Router (continued)
Rack Requirement
Rack size and strength
Rack connection to the building
structure
Copyright © 2013, Juniper Networks, Inc.
Guidelines
Ensure that the rack is a 19-in. rack as defined in Cabinets, Racks, Panels, and
Associated Equipment (document number EIA-310–D) published by the Electronics
http://www.eia.org
Industry Association (
Ensure that the rack is one of the following standard lengths:
23.62 in. (600 mm)
30.0 in. (762 mm)
21.5 in. (800 mm)
The rack rails must be spaced widely enough to accommodate the router chassis's
external dimensions: 8.71 in. (221 mm) high, 24.5 in. (622 mm) deep, and
17.45 in. (443 mm) wide. The spacing of rails and adjacent racks must also allow
for the clearances around the router and rack that are specified in
Clearance Requirements for Airflow and Hardware Maintenance" on page
The chassis height of 8.71 in. (22.1 cm) is approximately 5 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 several
MX240 Router units in a rack that has sufficient usable vertical space.
The rack must be strong enough to support the weight of the fully configured router,
up to 128 lb (58.1 kg). If you stack multiple fully configured routers in one rack, it
must be capable of supporting the combined weight of the routers.
Ensure that the spacing of rails and adjacent racks allows for the proper clearance
around the switch and rack as specified in
for Airflow and Hardware Maintenance" on page
Secure the rack to the building structure.
If earthquakes are a possibility in your geographical area, secure the rack to the
floor.
Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum
stability.
Chapter 4: Preparing the Site for MX240 Router Installation
).
"MX240 Router Clearance Requirements
58.
"MX240 Router
58.
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