Juniper PTX1000 Hardware Manual page 57

Rack type
Mounting bracket hole spacing
Rack size and strength
Table 21 on page 57 provides the rack requirements and specifications for the PTX1000.
Table 21: Rack Requirements for the PTX1000
Rack Requirement Guidelines
Rack type: four-post Use a 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 Components Industry Association
(http://www.ecianow.org/).
Mounting bracket The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the PTX1000
hole spacing can be mounted in any rack that provides holes spaced at that distance.
Rack size and
strength
Rack connection to
building structure
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 Components Industry Association (http://www.ecianow.org/).
Use a 600-mm rack as defined in the four-part Equipment Engineering (EE); European
telecommunications standard for equipment practice (document numbers ETS 300 119-1
through 119-4) published by the European Telecommunications Standards Institute
(http://www.etsi.org).
The horizontal spacing between the rails in a rack that complies with this standard is usually
wider than the router'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 PTX1000 chassis'
external dimensions. The outer edges of the front-mounting rails 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 36 in. (91.4
cm) front-to-back.
Ensure that the rack is strong enough to support the weight of the PTX1000.
Ensure that the spacing of rails and adjacent racks allows for proper clearance around the
PTX1000 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 wall or floor brackets for maximum stability.
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