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This rack diagram example was redesigned from the Wikimedia Commons file: Rackunit.svg. [commons.wikimedia.org/ wiki/ File:Rackunit.svg]
Rack with sample component sizes including an A/ V half-rack unit.
"A rack unit, U or RU as a unit of measure describes the height of equipment[which?] designed to mount in a 19-inch rack or a 23-inch rack. The 19-inch (482.6 mm) or 23-inch (584.2 mm) dimension reflects the width of the equipment mounting-frame in the rack including the frame; the width of the equipment that can be mounted inside the rack is less. One rack unit is 1.75 inches (4.445 cm) high. (This equates to one vershok, an obsolete unit of measurement used officially in Russia until 1924.)
The size of a piece of rack-mounted equipment is frequently described as a number in "U". For example, one rack unit is often referred to as "1U", 2 rack units as "2U" and so on." [Rack unit. Wikipedia]
The example "Rack with sample component sizes including an A/ V half-rack unit" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Rack Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Rack with sample component sizes
Rack with sample component sizes, rack unit, rack rails,
Used Solutions

rack, rack mount, rack solutions, server rack Rack Diagrams

rack, rack mount, rack solutions, server rack
The Rack Diagrams solution, including a vector stencil library, a collection of samples and a quick-start template, can be useful for all who deal with computer networks. Choosing any of the 54 library's vector shapes, you can design various types of Rack diagrams or Server rack diagrams visualizing 19" rack mounted computers and servers.

Network Diagramming Software for Network Active Directory Diagrams

ConceptDraw DIAGRAM is perfect for software designers and software developers who need to draw Network Active Directory Diagrams.

network layout, network floor plan, network visualization, network topologies, network topology mapper Network Layout Floor Plans

network layout, network floor plan, network visualization, network topologies, network topology mapper
Network Layout Floor Plans solution extends ConceptDraw DIAGRAM software functionality with powerful tools for quick and efficient documentation the network equipment and displaying its location on the professionally designed Network Layout Floor Plans. Never before creation of Network Layout Floor Plans, Network Communication Plans, Network Topologies Plans and Network Topology Maps was not so easy, convenient and fast as with predesigned templates, samples, examples and comprehensive set of vector design elements included to the Network Layout Floor Plans solution. All listed types of plans will be a good support for the future correct cabling and installation of network equipment.