Juniper MX480 Hardware Manual page 218

standard U divisions on the rack. The bottom of all mounting shelves is at 0.04 in. (0.02 U) above a "U"
division.
Table 98: Four-Post Rack or Cabinet Mounting Hole Locations
Hole Distance Above U Division
4 2.00 in. (5.1 cm)
3 1.51 in. (3.8 cm)
2 0.88 in. (2.2 cm)
1 0.25 in. (0.6 cm)
To install the mounting shelf on the front rails of a four-post rack or cabinet, or the rails of an open-frame
rack:
1. If needed, install cage nuts in the holes specified in
2. On the back of each rack rail, partially insert a mounting screw into the lowest hole specified in
Table 98 on page 221.
3. Install the small shelf on the back of the rack rails. Rest the bottom slot of each flange on a mounting
screw.
4. Partially insert the remaining screws into the open holes in each flange of the small shelf (see
Figure 49 on page 222
5. Tighten all the screws completely.
1.14 U
0.86 U
0.50 U
0.14 U
or Figure 50 on page 223).
Mounting Shelf
X
X
X
X
Table 98 on page 221.
221