Juniper ACX2000 Hardware Manual page 79

Rack size and strength
Rack connection to the building structure
Table 27 on page 79 provides the rack requirements and specifications for the router.
Table 27: Rack Requirements and Specifications for the Router
Rack Requirement
Rack type
Mounting bracket hole
spacing
Rack size and strength
Rack connection to
building structure
One pair of mounting brackets for mounting the router on two posts of a rack is supplied with each router.
For mounting the router on four posts of a rack or cabinet, you can order a four-post rack-mount kit
separately.
SEE ALSO
Guidelines
Use a two-post rack or a four-post rack. You can mount the router on any two-post or
four-post rack that provides bracket holes or hole patterns spaced at 1 U (1.75 in., or 4.45 cm)
increments and that meets the size and strength requirements to support the weight.
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
(http://www.eia.org).
The rack must meet the strength requirements to support the weight of the chassis.
The holes in the mounting brackets are spaced at 1 U (1.75 in., or 4.45 cm) so that the router
can be mounted in any rack that provides holes spaced at that distance.
Ensure that the rack complies with this standard:
A 19-in. (48.3 cm) rack as defined in Cabinets, Racks, Panels, and Associated Equipment
(document number EIA-310-D) published by the Electronics Industry Association
(http://www.eia.org).
Ensure that the rack rails are spaced widely enough to accommodate the router chassis'
external dimensions . The outer edges of the front-mounting brackets extend the width
of the chassis to 19.2 in. (48.7 cm).
The rack must be strong enough to support the weight of the router.
Ensure that the spacing of rails and adjacent racks allows for the proper clearance around
the router and rack.
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 to the wall or floor brackets for maximum
stability.
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