# How much space does a server rack need?

How much space does a server rack need? Rack Location

There should be enough room around the front, rear, sides and top of a rack for cooling air flow and access for engineers. A rule of thumb is to allow up to 6 standard floor tiles (600×600mm) as a space onto which to place a server rack.

What is server rack space? 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. One U is 1.75 inches (44.45mm); the standard rack, at 19 inches, is 42U.

What is the standard size of a server rack? Common Server Rack Sizes

The most popular modern server rack and cabinet dimensions are 24 inches (600mm) wide, 42 inches (1066.80mm) deep, and 73.6 inches (1866.90mm) tall. Those dimensions support most IT equipment and can generally handle power loads of 1kW to 3kW per rack.

How is rack space calculated? Rack Unit Spacing

The total rack unit is measured from the middle of the rack’s top hole of the previous U space to the top hole of the current U space. Even though the spacing between the holes is 0.625”, the remaining 0.5” comes from the distance between the bottom hole to the top hole of a RU.

## How much space does a server rack need? – Additional Questions

### What is the size of 42U rack?

Chatsworth 42U Rack – Dimensions and Specifications:
Maximum External Height External Width External Depth
82.30 in. (2090 mm) 24.00 in. (610 mm) 27.3 in. (693 mm) 27.00 in. (690 mm) 34.40 in. (874 mm) 40.40 in. (026 mm) 43.40 in. (1102 mm) 48.40 in. (1229 mm)

### What is meant by 42U rack?

A typical full size rack is 42U, which means it holds just over 6 feet (180 cm) of equipment, and a typical “half-height” rack is 18–22U, which is around 3 feet (91 cm) high.

### How many inches is a rack space?

A rack space is defined as 1.75 inches from top to bottom. Standard rack equipment conforms to this by either being 1.75 inches high, or some multiple of that. Equipment height is often stated in “rack units,” where 1U (one unit) is 1.75 inches, 2U is 3.5 inches, and so on.

### How many U are in a 7ft rack?

the “U” in “42U” is stands for “rack units,” or “U-spaces,” which equal 1.75 inches. If you are investing in data center racks, the standard height is 48U (“7-foot rack”) or, on some occasions, 42U.

### How wide is a 19 inch rack?

A 19-inch rack is a standardized frame or enclosure for mounting multiple electronic equipment modules. Each module has a front panel that is 19 inches (482.6 mm) wide.

### How many U are in a standard rack?

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. One U is 1.75 inches (44.45mm); the standard rack, at 19 inches, is 42U.

### How many servers can fit in a 42U rack?

Standard data center racks are 42U high (where U is a form factor measuring 1.75 in., with a standard PC “pizza box” base). Ordinary servers are usually 3U high, meaning a rack theoretically can hold 14 servers.

### How big is a 1U rack space?

One rack unit (1U) is 1.75″ (44.45 mm) of vertical space, or typically the equivalent of three rack hole spaces tall. One of the first criteria to consider when purchasing a rack is how many RUs your equipment requires.

### What is 2U and 4U rack?

The height of this rack is expressed in “units” called U (unit). 1U is 1.75 inches. So, 2U is 3.5 inches high and 4U is 7 inches high. This rule was established by the Electronic Industries Association (EIA).

### What is 12U rack?

For 12U, the “U” stands for the rack unit that is an EIA standard measuring unit for rack mount type equipment. 1U is equal to 1.75″ in height. A 12U wall cabinet means it would have 21″ internal usable space (12×1.75″).

### What is a 5U rack?

Updated: 11/13/2018 by Computer Hope. The 1U, 2U, 3U, 4U, 5U, 6U and 7U are all different sized rackmount servers, and the U following the number is short for unit. The number indicates the size of the rackmount, 1U being the smallest rackmount and 7U being the biggest rackmount.

### What does 6U rack mean?

A 6U rack or cabinet can house equipment whose total height when placed into the rack is no more 10.5inches or 26.67cm (2.67m) with 1U=1.75inches or 44.45mm.

### What is 2U rack space?

The ‘U’ in any server description is short for “RU” which stands for Rack Unit — this is the standardized designation for the form factor of the server: 1U = 1.75″ in height or thickness. 2U is 1.75″ x2 = 3.5 inches. All rackmount servers are 19″ in width.

### What does 4U mean in server?

The “U” actually stands for the vertical measure of a server rack. Basically, a rack unit comprises the height of a server rack with a 19-inch or 23-inch height. Since a typical full-sized rack comes in at 4U, the 2U rack servers and 1U rack servers are considered half-rack servers.

### What is 2U in server?

What is a 2U server? The thickness is measured in 4.445 cm. 1 U is 4.445 CM, 2 U is 2 Times 1 U is 8.89 cm. In other words, the so-called “2U rack-mounted server, ” is the shape of EIA specifications, the thickness of 8.89 cm products.

### What is the size of 6U rack?

Wall-mounted 19″ cabinet, 6U, glass door, 355 x 600 x 440 mm
Dimensions 6U 19″, 355x600x440 mm, (H x W x D), 3770mm working depth, (distance between bars and rear panel)
Protection degree IP 20
Additional equipment 3 sets of fixing screws in the holes of the supporting rails and a set of four screws for wall mounting

### What does 1U stand for?

The U represents number of units, meaning that 1U fills one unit of space in the server chassis. In most server chassis designs and servers used in them, 1U is equivalent to 1.7 inches high, 19 inches wide and 17.7 inches deep.