Server Rack Sizes: Understanding the Differences - RackSolutions
C H A P T E R 3 - Rackmounting the Servers
Amazon.com: StarTech.com 4-Post 18U Server Rack Cabinet, 19" Data Rack Cabinet for IT / Network Equipment, with Adjustable Mounting Rails : Everything Else
18U Server Rack Cabinet, UPS-Depth, Wall-Mount | Eaton
Server Rack Enclosure Cabinets | 42U | Depth Options