Table 1: Four-Post Rack and Cabinet Mounting Hole Locations (continued)
Small
Shelf
Spacer
BarsLarge ShelfDistance Above “U” DivisionHole
–x–10.86 U19.01 in. (48.3 cm)33
–x–7.86 U13.76 in. (34.9 cm)24
xx–4.86 U8.51 in. (21.6 cm)15
x––3.86 U6.76 in. (17.1 cm)12
x––4.86 U5.01 in. (12.7 cm)9
xx–1.86 U3.26 in. (8.3 cm)6
x––0.86 U1.51 in. (3.8 cm)3
––x0.5 U0.88 in. (2.2 cm)2
To install the mounting hardware for a four-post rack or cabinet:
•
Installing Cage Nuts, If Needed on page 8
•
Installing the Large Mounting Shelf and Spacer Bars on page 8
•
Installing the Small Mounting Shelf on page 9
•
Removing the Center-Mounting Brackets on page 9
Installing Cage Nuts, If Needed
For racks without threaded holes, you must install cage nuts in the locations specified in
Table 1 on page 7:
•
On each front rack rail, install cage nuts for the large shelf and spacer bars.
•
On each rear rack rail, install cage nuts for the small shelf.
Installing the Large Mounting Shelf and Spacer Bars
1. On the front side of each front rail, partially insert a mounting screw into the lowest
hole specified in Table 1 on page 7 for the large shelf.
2. Install the large shelf on the front side of the front rack rails. Rest the bottom slot in
each flange on one of the mounting screws.
3. Tighten all the screws completely.
4. Place one spacer bar over a flange of the large shelf.
5. Partially insert a mounting screw into each of the nonthreaded holes in the recesses
of the spacer bar.
Copyright © 2015, Juniper Networks, Inc.8
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