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But you also need to consider the external width of the. rack. The standard width for rack enclosures is 24 inches or 600 mm, which corresponds to the standard for removable floor. tiles in a raised-floor data center. Extra-wide rack enclosures (30 inches or 750 mm) are also available, with or without extra.
Rack with sample component sizes including an A/V half-rack unit. A typical section of rack rail, showing rack unit distribution. A rack unit (abbreviated U or RU) is a unit of measure defined as 1.75 inches (44.45 mm). It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed as multiples of rack units.