1 Rack Unit Size

What is 1u or one rack unit.

1 rack unit size. Cabinet or rack width is almost always 19 inches. 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. One u is 1 75 inches 44 45mm. A rack unit abbreviated as u less commonly seen as ru is a unit of measurement applied to equipment racks and the servers disk drives and other devices that they contain.

19 x 1 75 x 19 7. The industry standard rack cabinet is 42u tall however 45u racks are also common. The term relay rack appeared first in the world of telephony. One rack unit u is 1 75 inches.

19 x 1 75 x 17 7. When leasing space in a colocation facility or planning for an on site network cabinet or closet customers should focus on four key issues. How tall is a server rack. It is most frequently used as a measurement of the usable space of 19 inch rack frames as well as the height of equipment that mounts in these frames where the height of the equip ment is expressed as multiples of rack units.

Depth may range from less than 30 to more than 40 inches and height is measured in rack units below. By 1911 the term was also being used in railroad signaling. A rack unit or one u is the standard size for servers and other network equipment that is installed in 19 inch server racks. The standard rack at 19 inches is 42u.

It sets a standard for system spacing mounting bezel clearance as well as placement of the mounting holes in the mounting flange. The height of the electronic modules is also standardized as multiples of 1 75 inches 44 45 mm or one rack unit or u less commonly ru. The width of the equipment that can be mounted inside the rack is less. Symbol u or sometimes ru.

If your rackmount server is going to be placed in a constrained area confirm the exact dimensions with the rackmount manufacturer. Although the width and height of a rackmount may be standard the depth of a rackmount may change as shown below. One rack unit 1 inches of height of the equipment s rectangular front panel. The 19 inch 482 6 mm or 23 inch 584 2 mm dimension refers to the width of the equipment mounting frame in the rack including the frame.

To quickly convert rack units into inches use our rack unit conversion calculator or click here for a pdf u conversion chart. One rack unit is 1 75 inches. Standard racks with widths of 23 inches 584 mm and 30 inches 762 mm are also made but rarely encountered by consumers. A rack unit abbreviated u or ru is a unit of measure defined as 1 3 4 inches 44 45 mm.

A rack unit abbreviated u or ru is a unit of measure defined as 1 75 inches. The panel width is standardized at 19 inches 482 6 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. These racks offer room for equipment that us 19 wide 482 6 mm and have variable height expressed in rack units.