PDF Plan: Ru Rack Unit
Here is a brief explanation as to what a rack unit, or U/RMU is. A rack unit, U or RU is a unit of measure that describes the height of equipment designed to mount in a 19-inch rack or a 23-inch rack. A rack unit, U or RU is a unit of measure that describes the height of equipment designed to mount in a 19-inch rack or a 23-inch rack. The 19-inch (482.6 mm) or 23-inch (584.
Sizes of the racks used to mount electronics equipment. Symbol, U, or sometimes RU. A 3U panel would be (1 3 ) 5 high. Server Racks from the leading server rack enclosure manufacturers. A 42U rack would have an internal rack unit height dimension of 73.5 inches (1.8669 m). The 42U Rack features a symmetrical frame which allows enclosures to be bayed side by side, one in front of another, in a corner, in U or T arrangements and all without the need for an expensive intermediate frame. 1 RU RACK MOUNT TO HOLD 2.5 RACK UNITS overview and full product specs on CNET.
The size of a piece of rack mounted equipment is usually described as a number in U. One rack unit is also sometimes referred to as 1RU;