Dell 110 Marking the Rack, inch 0.625 inch 1.75 inches 1 U 0.625 inch, Rack Installation Guide

Marking the Rack

1.Determine where you want to place the bottom of the system.

CAUTION: If you are installing more than one system, install the first sys- tem in the lowest available position in the rack.

2.Mark the upper and lower-mounting positions on the two posts.

Each 1-U (1.75-inch) vertical space has three holes, with center-to-center spacing between holes (beginning at the center of the top hole of a 1-U space) of 0.625, 0.625, and 0.5 inch (see Figure 1-2).

0.5 inch

0.625 inch

1.75 inches (1 U)

0.625 inch

0.5 inch

Figure 1-2. Two-Post Open-Frame Relay Rack 1-U Hole Spacing

support.dell.com Rack Installation Guide 1-3