Sun Microsystems Ultra 30 Installation Manual page 6

The rackmounting kit is designed so that you can install it in a Sun system cabinet or
other similar industry-standard rack that meets the requirements listed in
You need one Sun rackmounting kit for each system that you wish to install (mount)
in a rack.
TABLE 2
Feature
Load bearing capacity
Vertical space requirements
Vertical mounting rail
EMI
Anti-tip protection
Minimum service access
Fire containment
2 Sun Ultra 30/60/80 Systems Rackmount Installation Guide • July 1999
Rack Requirements
Requirement
The rack must firmly support the weight of up to five Ultra
80 systems (at 66 lbs, 30 kg each) or six Ultra 30/60 systems
(at 45 lbs, 20 kg each), plus the weight of each associated
rackmounting kit.
Each Ultra 80 system requires seven rack units (12.3 inches,
31.1 cm) and each Ultra 30/60 system requires six rack units
(10.6 inches, 26.9 cm) of vertical space for rack installation.
(A 72-inch [183 cm] cabinet can accommodate up to five
Ultra 80 or six Ultra 30/60 systems.)
The rack must have two pairs of vertical mounting rails (one
pair in front, one in back) that conform to the EIA (RETMA)
standard for mounting hole spacing.
Left-side-to-right-side rail spacing (mounting hole center to
mounting hole center) for front and rear rails must be 18.3
inches (46.5 cm).
Front-to-rear rail spacing must be at least 28 inches (71.1 cm)
and not more than 34 inches (86.3 cm) from the outside face
of the front rail to the outside face of the rear rail.
Front and rear vertical rail mounting faces must be parallel
with each other and with the front plane of the rack.
Electromagnetic interference (EMI) shielding requirements
are met by the system chassis and metal side panels, which
remain in place when the unit is rackmounted.
The rack must be bolted securely to the floor or equipped
with a sturdy and extendable anti-tip leg. You must prevent
the cabinet from tipping forward when one or more systems
and other devices are fully extended out the front of the
rack.
An area not less than 3 feet (1 meter) deep and 6 feet (2
meters) wide must be available in front of the rack for
installation and service access.
The rack enclosure must meet Underwriters Laboratories,
Inc. and TUV Rheinland of N.A. requirements for fire
containment.
.
TABLE 2