Dell PowerVault MD1120 Installation Manual page 14

Figure 1-4. Marking the Vertical Rails
1
1 tape on vertical rail
Installing the Mounting Rails in the Rack
Installing the RapidRails Mounting Rails
1 At the front of the rack cabinet, position one of the RapidRails mounting
rails so that its mounting-bracket flange fits between the marks or tape
you placed (or numbered location) on the vertical rails (see Figure 1-5).
The top mounting hook on the front mounting-bracket flange should
enter the top hole between the marks you made on the vertical rails.
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Rack Installation Guide