NEC Express5800/120Rg-1 User Manual page 77

Only the inner rails remain screwed to the server when the rail assemblies have been removed.
IMPORTANT:
inner rails later. To install each rail assembly on the correct inner rail,
make a mark on the assemblies. Similarly, when installing more than
one server, distinguish between the pairs of inner rails and rail
assemblies of the servers by making marks.
Installing the Cage Nuts
Install three cage nuts on the front of the rack for each of the right and left sides and also two cage
nuts on the rear of the rack for each of the right and left sides.
Install three cage nuts in 1U (the minimum unit of rack height). Three slots (angle holes) are opened
per 1U of a rack. Install the cage nuts at the three slots. (For any NEC rack, round marks are put in
the unit of 1U.) For one cage nut installed on the front of the rack, the lower nut is used to fix the
front of the rail assembly, and the upper nut is used to support the setscrew of the server. The cage
nuts installed on the rear of the rack are used to fix the rear of the rail assemblies.
Inner rail
The removed rail assemblies are to be installed on the
Setting Up Your Server 3-9