HP BL20p - ProLiant - G2 Setup And Installation Manual page 29

To install the rack rails and cage nuts:
1. Position yourself at the front of the rack.
2. Measure the depth of the rack.
3. Be sure that the rail locking gear is in the unlocked position (1).
4. Press the rail locking tab to unlock the rack rail (2).
5. Adjust the rack rail to the depth of the rack using the numbers on the rack rail as
a guide (3). The depth of a Compaq branded rack (29 inches) is clearly indicated
on the rack rails.
Figure 3-1: Unlocking and adjusting a rack rail
IMPORTANT: Numbers on the rack rail provide a gross adjustment of the depth of the
rack rail. You may need to adjust the rack rail depth again to ensure a proper fit.
6. Insert the rear of the right rack rail into the rack at the marks you made when
measuring with the template.
NOTE: The rack rails feature "L" and "R" markings to identify the left and right rack rails
(from the front of the rack).
HP ProLiant BL p-Class System Setup and Installation Guide
Installing System Hardware
3-3