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Middle Atlantic R4 Series Four Post Open Frame Rack


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720.8  - $898.83

List Price: $865.80

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Middle Atlantic R4 Series Four Post Open Frame Rack

Need to mount servers? With its aluminum four-post design, the Middle Atlantic R4 Open Frame Rack can accommodate deeper and heavier components than a two-post frame rack. The R4's adjustable base can be configured to the inside of the rack to save space, or outward for improved stability.


  • Mounts equipment using standard, 12-24 threaded rackrail
  • Cage nut Z-rail adaptor for side mount installations
  • Open top can accept direct mounting of 6'', 9'' or 12'' cable ladder (Sold seperately)
  • Open frame provides for unrestricted air flow
  • Gangs to additional 2-post or 4-post open frame racks
  • Ships flat
  • 12-24 threaded hardware (100 quantity)
  • Weight capacity: 2,500 lbs
  • Depth when rack base is assembled to the outside: 42''
  • Flat Black powder coat finish
  • Suggested power: PDT Series, 20 amp (Sold seperately)
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  • Overall Width - Side to Side: 20.25"
  • Overall Product Weight: 75lbs

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Middle Atlantic R4 Series Four Post Open Frame Rack

Additional Documents

R4 Series Specifications

Weights & Dimensions

  • 38U Usable Height: 66.5''
  • 45U Usable Height: 78.75''
  • 51U Usable Height: 89.25''
  • Usable Depth: 30''
  • Overall 20.25'' W x 30'' - 42'' D, 75 lbs
  • Overall Width - Side to Side: 20.25"
  • Overall Product Weight: 75lbs


Product Type: Open rackMounting Type: 12-24 threaded
Frame Type: OpenSize (Unit): 31U-40U; 41U-45U; Over 45U
Weight Capacity: 2500Country of Manufacture: United States

About the Manufacturer

Middle Atlantic Products, Inc., an ISO 9001:2000 registered company, is a manufacturer of engineered mounting solutions. Their customer-first philosophy places special emphasis on quality, service, and meeting the everyday working needs of end-users. All of their products are designed from the installer’s point of view. From thermal considerations and built-in cable management on our racks and enclosures to pre-installed washers on our rack screws they look at all aspects of an installation to find ways to save time and simplify the job.

Middle Atlantic's customer-first philosophy doesn’t stop with their products. They have a fleet of regional delivery trucks that are based out of their New Jersey, Illinois and California facilities that deliver products throughout the majority of the country. In addition, Middle Atlantic's demonstration vehicles are always on the road displaying their products and providing a hands-on look at the unique features and benefits. RackTools™, which is a free layout and design package that they have developed, makes it easy to design your racks and enclosures and also generate Purchase Orders and Quotes effortlessly.

Founded in 1979 by President Bob Schluter, the firm maintains manufacturing and administrative facilities in Fairfield, NJ. At the heart of Middle Atlantic's technical prowess lie manufacturing capabilities led by laser-fabrication cells which produce smooth edges that are friendly to both cables and contactors hands and arms, automated forming lines, robots and high-speed turret presses that provide quick throughput to allow us to ship from stock . Complementing this formidable array of sophisticated machinery is a state-of-the-art environmentally friendly powder coat line that produces a scratch and corrosion resistant finish, as well as a variety of automated support equipment including CNC spot welders. Middle Atlantic's extensive selection of standard products includes steel rack enclosures, monitoring consoles, data cabling management products, audio and video studio furniture, power distribution products and related accessories.

Middle Atlantic R4 Series Four Post Open Frame Rack

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When you buy a Middle Atlantic R4 Series Four Post Open Frame Rack online from Wayfair, we make it as easy as possible for you to find out when your product will be delivered. You can check on a delivery estimate for the Middle Atlantic Part #: R412-XX30B here. If you have any questions about your purchase or any other Rackmounts product for sale our customer service representatives are available to help.Whether you just want to buy a Middle Atlantic R4 Series Four Post Open Frame Rack or shop for your entire home, Wayfair has a zillion things home.

Middle Atlantic R4 Series Four Post Open Frame Rack

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Return Policy

We want you to love it. If you don't, you may return your purchase within 30 days of delivery. All you need to do is visit our Self-Service Return Center for instructions. Return credits are issued within 24 hours once the item is received and inspected. Please note that shipping charges are non-refundable. The cost of return shipping will be deducted from your refund.

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OUR SKU # DF3490

R4 Series Four Post Open Frame Rack is also sometimes listed under the following manufacturer numbers: R412-3824B, R412-3830B, R412-4524B, R412-4530B, R412-5124B, R412-5130B