Appendix A
Installation Reference
51
Antitip protection
The cabinet must be bolted securely to the floor or equipped
with two sturdy and extendable antitip legs. You must
prevent the cabinet from tilting forward when one or more
servers or devices are fully extended out the front of the
cabinet.
Airflow
The server operating airflow is 92 cfm, regardless
of ambient air and altitude. This airflow provides
appropriate cooling up to 104
o
F (40
o
C) and 10,000
feet (3000 meters).
For proper ventilation of the server, the front and back
doors must comply with the following minimum open area
requirements.
• 60 percent of the area of the front door that is directly in
front of the server must be open.
• 63 percent of the area of the back door that is directly
behind the server must be open.
• Maintain a minimum of 1.5 inches (3.8 cm) clearance
between the server and any front or back doors.
If the doors of the cabinet do not meet the open area
requirements, remove the door or doors that do not comply.
Vertical mounting rails
The cabinet must have two pairs of vertical mounting rails
(one pair in front, one pair 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 back rails must be 17.72
inches (45 cm).
Front-to-back rail spacing must be at least 23 inches (58.42
cm) and not more than 34.5 inches (87.63 cm) from the
outside face of the front rail to the outside face of the back
rail.
Front and back vertical rail mounting faces must be parallel
with each other and with the front plane of the rack.
TABLE A-5
4-Post Cabinet Requirements
(Continued)
Cabinet Feature
Requirement
