Juniper QFX10002 Hardware Manual page 82

• Rack connection to the building structure
Table 32 on page 73 provides the rack requirements and specifications for the QFX10002.
Table 32: Rack Requirements for the QFX10002
Rack Requirement Guidelines
Rack type: four- Use a four-post rack that provides bracket holes or hole patterns spaced at 1-U (1.75 in. or
post 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
(document number EIA-310–D) published by the Electronics Industry Association.
Mounting bracket The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the
hole spacing switch can be mounted in any rack that provides holes spaced at that distance.
Rack size and
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strength
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Ensure that the rack complies with the standards for a 19-in. or 23-in. rack as defined in
Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D)
published by the Electronics Industry Association.
Use a 600-mm rack as defined in the four-part
telecommunications standard for equipment practice (document numbers ETS 300
119-1 through 119-4) published by the European Telecommunications Standards
Institute (https:/ /www.etsi.org).
The horizontal spacing between the rails in a rack that complies with this standard is
usually wider than the device's mounting brackets, which measure 19 in. (48.26 cm)
from outer edge to outer edge. Use approved wing devices to narrow the opening
between the rails as required.
Ensure that the rack rails are spaced widely enough to accommodate the switch chassis'
external dimensions. The outer edges of the front-mounting brackets extend the width
to 19 in. (48.26 cm).
Ensure that the front and rear rack rails are spaced between 28 in. (71.1 cm) and 31 in.
(78.7 cm) front-to-back.
Ensure that the rack is strong enough to support the weight of the switch.
Ensure that the spacing of rails and adjacent racks allows for proper clearance around
the switch and rack.
Cabinets, Racks, Panels, and Associated Equipment
Equipment Engineering (EE); European
73