Dell POWEREDGE 1955 - Manual (Page 11)

Rack Installation Guide
9
Removing the Rack Doors
See the procedures for removing doors in the documentation provided with your rack cabinet.
CAUTION:
Because of the size and weight of the rack cabinet doors, never attempt to remove or install
them by yourself.
CAUTION:
Store the two doors where they will not injure someone if the doors accidently fall over.
Marking the Rack
You must allow 7 U (31.1 cm or 12.25 inches) of vertical space for each system you install
in the rack (see Figure 1-3).
NOTE:
Your rack may already be marked and not require this procedure.
CAUTION:
If you are installing more than one system, install the rail assemblies so that the first system
is installed in the lowest available position in the rack.
1 Place a mark on the rack’s front vertical rails where you want to locate the bottom
of the system you are installing in the rack cabinet.
The bottom of each 1-U space is at the middle of the narrowest metal area between holes
(marked with a horizontal line on some rack cabinets—see Figure 1-3).
Figure 1-3. One Rack Unit
1 U (44 mm or 1.75 inches)
12.7 mm (0.5 inch)
15.9 mm (0.625 inch)
15.9 mm (0.625 inch)
12.7 mm (0.5 inch)