3 cm) (two- or four-post EIA cabinet or rack, with mounting rails that conform to English universal hole spacing per section 1 of ANSI/EIA-310-D-1992). For more information, see Requirements Specific ...
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Before installing system components, locate the hole pattern in the rack rails to allow adequate Unit height (U) of vertical space. Rack cabinets that meet EIA-310 standards have an
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The distance between the rear of the chassis and the perforated rear door of the cabinet (required for airflow in the cabinet, if used) should be 3.0 in. (7.6 cm). No clearance is required between the
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To help with cable management, you might want to allow additional space in the rack above and below the chassis to make it easier to route all of the fiber optic or copper cables through the rack.
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The 19-inch (482.6 mm) standard rack arrangement is widely used throughout the telecommunications, computing, audio, video, entertainment and other industries, though the Western Electric 23-inch
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Server racks use a standardized mounting hole spacing pattern that allows equipment to be securely installed on the rack rails. Each rack unit (1U) contains three mounting holes on the
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See the diagram below. The three hole group spacing is measured from center hole to center hole and does not vary, regardless of whether the server rack has square or round mounting
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Server racks use a standardized mounting hole spacing pattern that allows equipment to be securely installed on the rack rails. Each rack unit (1U)
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Clear guide to rack rail hole spacing and the EIA-310 standard. Learn the 1.75-inch rack unit pattern, why the three-hole groups matter, and how to avoid mounting mistakes.
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OverviewEquipment mountingOverview and historyCoolingSpecificationsRelated standardsGallery
Originally, the mounting holes were tapped with a particular screw thread. When rack rails are too thin to tap, rivet nuts or other threaded inserts can be used, and when the particular class of equipment to be mounted is known in advance, some of the holes can be omitted from the mounting rails. Threaded mounting holes in racks where the equipment is frequently changed are pr
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This standard includes mechanical details for vertical hole spacing, horizontal hole spacing, rack opening, front panel width, etc. The standard is periodically updated to address industry
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Hole spacing and panel mounting This standard ensures dimensional alignment for rackmount servers, network switches, and other 1U/2U equipment used widely in data centers and
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Discover the essential guide to 19-inch rack sizes and dimensions for servers and rackmount PCs. Learn about standards, specifications, and best practices today!
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