HP DL760 - ProLiant - 1 GB RAM User Manual page 59

Stabilizers
The anti-tip stabilizer provides stability and support when equipment is installed,
removed, or accessed within the rack. HP recommends that you use a stabilizer
option kit with a stand-alone rack.
Ballast Kits
Ballast kits can be added to a cabinet to increase side-to-side and front-to-back
mechanical stability. Lightly loaded cabinets may require ballast to keep them from
tipping over when a force is applied to the side of the cabinet. Heavily loaded
systems, depending on the particular configuration involved, usually do not require
ballast.
To be sure of rack stability, the minimum weight of the installed equipment should
be 114 kg (210 lb). Ballast kits should be added in the event a system has less than
114 kg (210 lb) minimum weight. In addition, ballast kits should also be installed if
any single system component weighs over 45 kg (100 lb) such that a minimum of
91 kg (200 lb) of ballast and equipment remains in place when the component is
extended from the rack.
A single ProLiant DL760 G2 server typically weighs between 63 kg and 73 kg
(140 lb to 161 lb), depending on configuration. If a single ProLiant DL760 G2 server
is the only component installed in a rack, you must add two ballast kits. Each kit
contains two 18 kg (40 lb) ballasts. Two ballast kits (a total of four ballasts) equal
73 kg (160 lb), bringing the total up to a minimum of 136 kg (300 lb).
If two ProLiant DL760 G2 servers are the only components installed in a rack, you
must add a single ballast kit, which maintains a minimum weight of 91 kg (200 lb)
remaining in the rack when one of the servers is extended.
Refer to any additional installation documentation provided with the rack.
HP ProLiant DL760 Generation 2 Server User Guide
Installing the Server in a Rack
2-15