Middle Atlantic R4 Series 45RU 4-Post Open Frame Rack - 24in Depth

The Middle Atlantic R4 Series 45RU 4-Post Open Frame Rack - 24in Depth is a purpose-built mounting solution designed for professional environments where stability, space, and airflow matter. This 4-post open frame rack is engineered to support deeper, heavier components than a traditional two-post frame, making it an ideal home for networking gear, telecom equipment, VOIP hardware, routers, switches, servers, and more. With a generous 45 rack units (RU) of vertical space and a substantial 24-inch depth, the R4CN-4524B provides ample room for complex assemblies, multi-device configurations, and future expansions, all while maintaining easy access for maintenance and cable management. The rugged steel construction and thoughtful design balance load-bearing capacity with flexibility, ensuring that your equipment remains secure and accessible in data centers, network closets, and professional AV installations. Whether you’re outfitting a small IT room or a larger telecom rack bay, this open-frame option delivers reliability, versatility, and efficient cooling to keep equipment performing at peak levels.

• Generous 45U capacity and 24-inch depth — This deep open frame rack provides ample space for larger, deeper devices while leaving room for cabling, power distribution, and effective cooling. The extra depth accommodates 1U and 2U servers, high-density switches, telecom line cards, large patch panels, and power strips, all in a single, organized footprint. With 45U of vertical space, technicians can group gear by function, stacking core networking gear at the bottom and more accessible management panels toward the top for quick maintenance and upgrades.
• Stable four-post design — The robust four-post configuration delivers superior rigidity and load distribution, reducing wheel or rack tilt during equipment installation and servicing. This stability is essential when mounting heavier devices, supporting precise alignment for front-panel access, and maintaining structural integrity through ongoing reconfigurations and cable re-terminations. The four-post frame also provides consistent mounting points across the entire height, improving compatibility with a wide range of 19-inch devices.
• Industry-standard 19-inch mounting rails — Equipped with standard 19-inch rack rails, the R4 Series accommodates most common rack-mount equipment and accessories. Rails are adjustable to fit different device depths and come with mounting holes aligned to industry tolerances, ensuring secure attachment of servers, switches, patch panels, and other equipment. This compatibility simplifies upgrades and expansions, letting you mix and match gear from multiple vendors without worrying about fit.
• Flexible styles and configurations — The R4 open frame lineup is offered in multiple styles to fit distinct installation environments. Whether you need optimized cable management, enhanced ventilation, or easier access for routine maintenance, you can select the style that best aligns with your space constraints and workflow. The flexibility of the R4 series makes it suitable for a wide range of setups—from data-center-style clean rooms to field-ready telecom closets and broadcast/AV racks.
• Easy assembly and straightforward integration with common IT gear — The rack is designed for quick, tool-efficient assembly and integration with standard rack-mount hardware. With clearly labeled components and accessible mounting points, technicians can assemble, level, and secure the frame rapidly, then begin mounting devices. The design emphasizes serviceability, allowing quick reconfiguration as your network grows or changes.

Technical Details of Middle Atlantic R4 Series 45RU 4-Post Open Frame Rack - 24in Depth

• Model: R4CN-4524B
• Type: 4-post open frame rack
• RU capacity: 45U
• Depth: 24 inches
• Material: Steel with durable powder-coated finish
• Finish: Black powder coat for corrosion resistance and long-term durability
• Rails: Standard 19-inch mounting rails with adjustable depth
• Compatibility: Designed for standard 19-inch equipment and accessories
• Ventilation: Open-frame construction supports airflow around mounted devices
• Configuration: Available in two styles to suit different installation environments

How to install Middle Atlantic R4 Series 45RU 4-Post Open Frame Rack - 24in Depth

• Prepare the installation space: ensure the floor is level, and verify that the location can support the rack’s weight and airflow requirements. If mounting to a larger cabinet or floor anchors, follow local guidelines and facility standards for securing equipment.
• Identify front and rear rails: determine the appropriate orientation for your equipment and align the rails with the side frames. Use standard 19-inch hardware to attach the rails at the correct depth for your devices, and verify vertical alignment before proceeding.
• Install equipment from bottom to top: begin with heavier, bulkier devices at the lower portion to lower the center of gravity and improve stability. Secure each device to the rails using the appropriate screws and washers, ensuring front and rear mounting holes are properly engaged.
• Cable management and airflow: route power and data cables through the rear channels or behind the mounted devices to avoid pinching and to maximize airflow. Use cable ties or Velcro straps to organize bundles, keeping clear paths for fans and ventilation between devices.
• Test and verify: power on the equipment to confirm proper operation and network connectivity. Check that all devices are firmly mounted, that there are no loose cables, and that the system maintains adequate airflow. Re-check and tighten fasteners as needed after the initial operation period.

Frequently asked questions

• Q: What is the RU capacity of this rack?
  A: 45U.
• Q: What depth is the Middle Atlantic R4 Series 45RU 4-Post Open Frame Rack?
  A: 24 inches.
• Q: Will standard 19-inch equipment fit?
  A: Yes—the rack uses standard 19-inch mounting rails compatible with most rack-mount hardware.
• Q: Are there different styles available?
  A: Yes, the R4 series is offered in two styles to suit different installation needs and cable-management preferences.
• Q: What accessories are recommended for cable management?
  A: Use the built-in channels and compatible 19-inch cable-management accessories to keep bundles organized and maximize airflow.