Fujitsu M1 User Manual download pdf (Page 37)

Preparing to install rack components

The Height Unit (HU)

The unit of measurement used in the PRIMECENTER M1 19-inch rack is the

height unit (HU). One height unit comprises a 3-hole section in the front area

and mounting area (starts and ends with a narrow metal bar) and corresponds

to 44.45 mm or 1 ¾ inches.

The height units are numbered consecutively in ascending order from 1

upwards on each vertical support upright.

Figure 10: Height unit (HU)

1 HE

1 HU

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 116 117

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Fujitsu M1 User Manual Page 37