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4-Post Open Frame Rack

Bulletin Number:

  • DOFR4
  • Industry Standards:

    UL 2416 Listed; File No. E230874 cUL Listed per CSA C22.2 No. 182.4; File No. E230874 EIA 310-D
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    Smooth RAL 9005 black polyester powder paint finish or RAL 9003 white polyester powder paint finish.


    4-Post Open Frame Racks combine the mounting security of a cabinet with the accessibility of a rack. Used in communication data center and telecommunication room applications, these adjustable-depth racks support deeper, heavier network equipment and can be ganged with standard 2-post or other 4-post racks to expand existing systems.


    6,655,533 (U.S.A.)


  • Uprights on the tapped-hole model are made of lightweight extruded aluminum (6063-T6 alloy) and include RU markings on both front and back of uprights
  • Uprights on the square-hole model are made from 12 gauge steel
  • Top and bottom angles made of extruded aluminum (6063-T6 alloy)
  • Features:

  • Depth adjustable 450 mm to 1050 mm (17.7 in. to 41.3 in.) in 25-mm (.98-in.) increments
  • EIA universal 5/8 - 5/8 - 1/2 in. spaced 12-24 tapped holes or .375-in. square holes fit 19-in. rack equipment
  • Compatible with 19-in. rack accessories
  • Available with nominal frame height of 6, 7 and 8 ft.
  • RU markings on both front and back of tapped-hole uprights make it easier to mount equipment
  • Floor mounting holes predrilled at .750-in. diameter
  • 12-24 rack mounting screws (pkg. of 20) included with tapped-hole model
  • For square hole model, order screws and cage nuts separately
  • Can be ganged with both 2- and 4-Post Open Frame racks
  • Includes complete assembly instructions
  • Shipped unassembled for convenient transport to job site
  • Drawings and Technical Publications are available by clicking the "Items" tab. Select your desired Catalog Number and click on the Downloads tab for that particular catalog number.
    Catalog Number A in. B in. Mounting Hole Type Rack Units Nominal Frame Height A Finish
    Catalog Number A in. B in. Mounting Hole Type Rack Units Nominal Frame Height A Finish
    71.88 20.25 Tapped 38 6 Black
    83.88 20.25 Tapped 45 7 Black
    83.88 20.25 Tapped 45 84 White
    83.88 20.25 Square 45 7 Black
    83.88 20.25 Square 45 7 White
    96 20.25 Tapped 51 8 Black
    96 20.25 Square 51 8 Black