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2. Rack unit - Wikipedia

   en.wikipedia.org/wiki/Rack_unit

   Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] 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 ...

3. 19-inch rack - Wikipedia

   en.wikipedia.org/wiki/19-inch_rack

   Thus, a 1U rackmount computer is not 1.750 inches (44.5 mm) tall but is 1.719 inches (43.7 mm) tall. If n is number of rack units, the ideal formula for panel height is h = 1.75n − 0.031 for calculating in inches, and h = 44.45n − 0.794 for calculating in millimeters. This gap allows a bit of room above and below an installed piece of ...

4. Rack rail - Wikipedia

   en.wikipedia.org/wiki/Rack_rail

   The height of rack rail is determined by the number of rack units required for mounting the equipment. The design of racks and rack rails is specified in ECIA - EIA/ECA-310. Each rack unit (U) is equivalent to 1 + 3 ⁄ 4 in (44 mm). Most rack rail is in sizes from 2 units high (3 + 1 ⁄ 2 in or 89 mm) to 54 units high (78 + 3 ⁄ 4 in or ...

5. Eurocard (printed circuit board) - Wikipedia

   en.wikipedia.org/wiki/Eurocard_(printed_circuit...

   Height is measured in rack units, "U", with 1 U being 1.75 in (44.45 mm). This dimension refers to the subrack in which the card is to be mounted, rather than the card itself. A single card is 100 mm high. Taller cards add a 133.35 mm, so that a double height card is 233.35 mm high and a triple 366.7 mm high.

6. List of unusual units of measurement - Wikipedia

   en.wikipedia.org/wiki/List_of_unusual_units_of...

   Horizontal pitch (HP) is a unit of length defined by the Eurocard printed circuit board standard used to measure the horizontal width of rack mounted electronic equipment, similar to the rack unit (U) used to measure vertical heights of rack mounted equipment. One HP is 0.2 inches (1/5") or 5.08 millimetres wide.

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   mail.aol.com

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8. Dell M1000e - Wikipedia

   en.wikipedia.org/wiki/Dell_M1000e

   The M1000e fits in a 19-inch rack and is 10 rack units high (44 cm), 17.6" (44.7 cm) wide and 29.7" (75.4 cm) deep. The empty blade enclosure weighs 44.5 kg while a fully loaded system can weigh up to 178.8 kg.

9. Open Rack - Wikipedia

   en.wikipedia.org/wiki/Open_Rack

   Open Rack is an Open Compute Project standard [1] for a new rack and power delivery architecture and an efficient, scalable alternative to the EIA-310 19-inch rack. It differs from the traditional EIA-310 rack in that it was designed specifically for large-scale cloud deployments. There are four key features that make this rack design more ...