Comments on: Define: Rack Unit “U” or “RU”

By: Nate

Nate — Thu, 06 Oct 2011 15:49:03 +0000

There’s a Russian unit of measure called the “vershok” which is equal to 1.75 inches. So next time you’re ordering racks, specify their height in vershki!

By: Universal Rails may be the answer | The Server Rack FAQ

Universal Rails may be the answer | The Server Rack FAQ — Mon, 12 Sep 2011 20:13:20 +0000

[...] as well. Frequently, you’ll find versions of Universal Rack Rails that support different U-heights and various weight capacities. Because the simple design doesn’t include rotating ears, [...]

By: How tall can a server rack be? | The Server Rack FAQ

How tall can a server rack be? | The Server Rack FAQ — Tue, 05 Jul 2011 17:46:39 +0000

[...] heights found in data centers are typically around the 42U to 44U range. By the way, one “U” or “RU” space is 1.75″ tall. So, by replacing a 42U with a 55U, you gain [...]

By: Tom Rodby

Tom Rodby — Mon, 14 Jan 2008 14:13:27 +0000

You state “1U occupies 1.75″ (22.25mm) of”, the 22.25 is not correct and should be 44.5 mm.