NEC N8100-1056F User Manual page 83

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 Core Nuts
Install three core nuts on the front of the rack for each of the right and left sides and also two core
nuts on the rear of the rack for each of the right and left sides.
Install three core nuts in 1U (the minimum unit of rack height). Three slots (angle holes) are
opened per 1U of a rack. Install the core nuts at the three slots. (For any NEC rack, round marks
are put in the unit of 1U.) For one core 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 set screw of the server.
The core nuts installed on the rear of the rack are used to fix the rear of the rail assemblies.
The removed rail assemblies are to be installed on the
Setting Up Your Server 3-9
Inner rails