Juniper MX2020 Hardware Manual page 154

The rack must have sufficient vertical usable space to accommodate the height of the router:
78.75 in. (200 cm). You can install one chassis in a rack. A typical four-post rack measures 84 in. (213.4 cm)
high, 24 in. (61 cm) to 30 in. (76.2 cm) deep, and 19 in. (48.3 cm) wide (see
NOTE: A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated
Equipment (document number EIA-310-D) published by the Electronic Components Industry
Association (ECIA) (http://www.ecianow.org).
The location of the rack must provide sufficient space to accommodate the depth of the router. The
chassis with the standard cable management system is 35.72 in. (90.7 cm) deep.
The chassis with the extended cable management system is 37.46 in. (95.1 cm) deep.
The rack must be strong enough to support the weight of the fully configured router, up to 1,515 lb
(687.19 kg).
NOTE: For a complete list of chassis and component weights and measurements, see
"MX2020 Physical Specifications" on page
NOTE: There must be a minimum of 45-U of usable rack space when installing the MX2020
router into a 45-U rack.
Figure 54 on page
125.
131
132).