M320 Mounting Hole Locations For Open-Frame Racks; Figure 27: Center-Mounting Bracket Removal; Chapter 5 Installing The M320 Router Mounting Hardware; Table 19: Open-Frame Rack Mounting Hole Locations - Juniper M320 Hardware Manual

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M320 Mounting Hole Locations for Open-Frame Racks

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Figure 27: Center-Mounting Bracket Removal

M320 Site Preparation Checklist Requirements on page 41
M320 Chassis Lifting Guidelines on page 216
The mounting holes for the adjustable center-mounting brackets are spaced
0.984 in. (25 mm) apart. The adjustable center-mounting brackets have holes for
rack-mounting screws, spaced at 3.5 in. (8.89 cm).
For an open-frame rack, Table 19 on page 59 specifies the holes in which you insert
mounting screws (an indicates a mounting hole location), and cage nuts if needed.
X
The hole distances are relative to one of the standard "U" divisions on the rack. For
reference, the bottom of all mounting shelves is at 0.04 in. (0.02 U) above a U division.

Table 19: Open-Frame Rack Mounting Hole Locations

Hole Distance Above "U" Division
30 17.26 in. (43.8 cm)
27 15.51 in. (39.4 cm)
Chapter 5: Installing the M320 Router Mounting Hardware
Large Shelf
9.86 U
X
8.86 U
X
Small Shelf
59