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The internal measurements in the following illustration are of one column in the rack
cabinet.
Top View
40.0 cm
(15.75 in)
450 mm
(17.7 in)
465 mm (18.3 in)
483.4 mm
(19.0 in)
Figure 3. Measuring inside of the rack cabinet
All vertical rack cabinet measurements are given in rack units (U), where 1U is
equal to 44.5 mm (1.75 in.) The U levels are marked on labels on the front and rear
mounting flanges inside of the rack cabinet, as shown in Figure 4.
Figure 4. Measuring U levels within rack cabinets
Front View
465 mm (18.3 in)
1 U
44.5 mm
(1.75 in)
Chapter 2. Site preparation and requirements
450 mm
(17.7 in)
483.4 mm
(19.0 in)
9
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