Middle Atlantic MRK Series 44RU Open-Frame AV Rack with Back Door - 31in Depth, 22in Width

Designed for professional environments that demand reliability, modularity, and effortless serviceability, the Middle Atlantic MRK Series 44RU Open-Frame AV Rack is the workhorse enclosure installers rely on for large-scale, multi-bay configurations. This open-frame rack blends rugged construction with a space-saving footprint, delivering a stable, ventilated platform for a broad range of AV, IT, and control equipment. Its back door provides secure rear access for cable management, service tasks, and future upgrades, while maintaining clean, professional aesthetics that fit broadcast rooms, concert venues, classrooms, control rooms, and corporate installations. The MRK line is engineered to handle demanding loads and harsh environments, yet remains flexible enough to adapt as the system evolves. With 44U of mounting space, 22-inch width, and 31-inch depth, it accommodates a wide array of gear from video processors and matrix switchers to power distribution and server modules, all while supporting efficient cooling and organized cable routing. Installers appreciate the MRK Series for its seismic certification, robust frame, and compatibility with Middle Atlantic’s expansive ecosystem of rails, panels, fans, and accessories. Whether you are deploying a single, high-density rack or constructing a multi-rack data/AV backbone, MRK Series enclosures are built to perform like a dependable partner—today and for years to come.

• Rugged 44RU open-frame enclosure: A heavy-duty steel frame provides the backbone for demanding AV gear, delivering dependable support and a secure back door that facilitates rear access for cables, maintenance, and future upgrades.
• Compact, space-saving footprint: With a 22-inch width and 31-inch depth, the MRK frame is optimized for multi-bay installations where space is at a premium, yet room for efficient airflow, component spacing, and organized cabling remains essential.
• Seismic-certified for safety: The MRK Series carries seismic certification, meeting safety and compliance requirements for commercial, educational, and entertainment venues—reducing risk in multi-story installations and demanding environments.
• Open-frame design with versatile access: The open-frame configuration, combined with a removable back door, enables fast equipment installation, straightforward cable management, and uncomplicated service access without compromising structural integrity.
• Modular compatibility and expansion: Designed to integrate seamlessly with the MRK family’s rails, panels, fans, cable managers, and other accessories, allowing you to tailor the system to your current needs and scale for future growth.

Technical Details of Middle Atlantic MRK Series 44RU Open-Frame AV Rack

• RU Capacity: 44U of mounting space to accommodate a wide range of AV, IT, and broadcast equipment while maintaining accessible service areas for cabling and cooling.
• Rack Width: 22 inches, optimized for multi-rack configurations and standard 19-inch equipment with standard mounting ears.
• Depth: 31 inches from front mounting rails to rear access, providing ample room for deeper components and organized cable runs.
• Back Door: Included back door for secure rear access and enhanced cable management while preserving a clean front profile.
• Frame and Finish: Heavy-duty 14-gauge steel construction with a durable black powder-coated finish designed to withstand busy environments and maintain a professional appearance.
• Seismic Certification: Seismic-rated design to meet safety and compliance standards across commercial markets and multi-story installations.

How to Install Middle Atlantic MRK Series 44RU Open-Frame AV Rack

• Plan the layout and site preparation: Confirm floor load capacity, room dimensions, ventilation clearance, and access routes for equipment delivery and installation; verify that the space accommodates door swing and rear cable routing.
• Install mounting rails: Attach standard 19-inch rack rails at the correct heights to support your equipment; insert cage nuts and screws to prepared rails, ensuring level alignment across the rows.
• Position the rack and secure it: Place the open-frame rack in the chosen location, check for plumb and level, and anchor as required by local building codes or installer guidelines to prevent movement during operation.
• Mount equipment: Begin with the heaviest components at the bottom to maintain stability; use proper 19-inch mounting hardware, space equipment for cooling, and carefully organize power, signal, and data cables to minimize interference.
• Attach back door and accessories: Reattach or install the back door, cable managers, fans, and any MRK-compatible accessories; route cables neatly and use cable ties or Velcro to maintain airflow and accessibility.
• Test, label, and finalize: Power up the system, verify alignment of doors and rails, confirm airflow, and label all cables for future maintenance; double-check grounding and EMI considerations for a clean, reliable operation.

Frequently asked questions

• Q: What does the MRK 44RU Open-Frame AV Rack include? A: The MRK 44RU package includes the open-frame rack with a back door; additional MRK accessories—such as mounting rails, panels, fans, and cable management components—are available separately to customize the system for your installation.
• Q: What equipment can be mounted in this rack? A: The rack supports standard 19-inch rack-mount equipment across 44U, including AV processors, video switchers, distribution amps, power distribution, network gear, and rack-mounted servers, with attention to weight distribution, ventilation, and accessible cabling.
• Q: Is the rack seismic-certified? A: Yes, the MRK series enclosures are seismic-certified to meet safety and building code requirements for commercial, educational, and entertainment environments.
• Q: Does it come with casters or feet? A: The MRK open-frame design is typically shipped without casters or floor-mounted feet; these accessories can be added separately to enable mobility or level adjustment as needed.
• Q: How can I optimize cooling inside the rack? A: Use MRK-compatible fans or perforated panels, maintain unobstructed airflow by organizing cables, and ensure adequate clearance on all sides and the rear for proper ventilation and heat dissipation.