Middle Atlantic MRK Series 40RU Open-Frame AV Rack with Back Door - 26in Depth, 22in Width

The MRK Series 40RU Open-Frame AV Rack with Back Door from Middle Atlantic is built for performance in demanding installation environments. Designed as a true workhorse for large-scale multi-bay deployments, this enclosure combines rugged construction, space-efficiency, and practical access to keep AV, IT, and control gear running smoothly. The 22" wide, 26" deep footprint fits tight rooms and dedicated equipment closets while delivering ample room for racks, power distribution, and cable management. With seismic certification and a secure back door, this rack supports dependable equipment organization, simplified maintenance, and scalable system growth for professional integrators and installers.

• 40U open-frame rack capacity: Provides generous vertical space for servers, amplifiers, control processors, patch panels, and other 19" equipment, enabling clean organization and easy expansion across multi-bay projects.
• Compact, space-saving footprint: 22" width and 26" depth optimize floor space in crowded AV rooms, rack closets, and performance venues without sacrificing accessibility or ventilation.
• Back door included for secure cable management: A practical back door ensures tidy cabling, improved security, and straightforward serviceability while preserving airflow and access to installed gear.
• Rugged, seismic-certified design: Engineered to withstand lateral forces and meet seismic requirements, protecting critical equipment in disruptive environments and improving install reliability.
• Industry-standard compatibility and ease of installation: Built around 19" rack rails with durable powder-coated finish, the MRK rack integrates smoothly with existing systems, accessories, and professional AV hardware for scalable installations.

Technical Details of Middle Atlantic MRK Series 40RU Open-Frame AV Rack with Back Door

• Rack units: 40U open-frame rack space for modular equipment mounting.
• External dimensions: 22" (width) x 26" (depth). Height is defined by 40U of rack space.
• Back door: Included to secure cabling and provide convenient service access.
• Construction: Heavy-gauge steel frame with durable powder-coated finish designed for long-term use in professional environments.
• Rails and compatibility: Accepts standard 19" equipment with adjustable mounting rails to accommodate a range of gear depths and configurations.
• Seismic certification: Seismic-rated to enhance stability and protection of mounted equipment in compliant installations.
• Ventilation and access: Open-frame design promotes airflow and simplifies front-to-back service, with options for additional front/back door configurations and ventilation accessories.
• Finish: Black powder coat for durability and a professional appearance in equipment rooms and studios.
• Weight handling: Built to support dense, multi-device loads typical of large AV/IT deployments, with a focus on structural integrity and reliability.

How to Install Middle Atlantic MRK Series 40RU Open-Frame AV Rack with Back Door

• Choose a clean, level location with sufficient floor load capacity and ventilation. Verify power sources meet the combined requirements of installed equipment.
• Unpack the MRK rack and inspect for any shipping damage. Remove protective packaging and prepare the installation area for assembly.
• Position the open-frame rack in the chosen space. If mounting to a wall or floor kit is required for your installation, attach brackets or support hardware per the space and load considerations.
• Install the 19" mounting rails inside the rack at the elevations needed for your equipment. Use appropriate fasteners and verify rails are level and securely anchored.
• Mount equipment sequentially, starting with heavier items at the bottom for stability. Use anti-tip measures and route cables to minimize strain on connectors and ensure adequate airflow.
• Attach the back door to provide secure access to rear cabling. Route power and signal cables through designated openings, using cable management accessories to keep interfaces organized.
• Perform a functional test: power on devices, confirm interconnects, verify cooling airflow, and check accessibility of front and rear panels for maintenance.
• Document the final rack layout, including equipment positions, power distribution, and labeling, to facilitate future upgrades and service calls.

Frequently asked questions

• What is the rack capacity of the MRK Series 40RU Open-Frame AV Rack? It provides 40 rack units (40U) of open-frame space for mounting 19" equipment, enabling flexible, scalable configurations for AV and IT gear.
• Does the rack come with a back door? Yes. The MRK Open-Frame model includes a back door to secure cabling and simplify maintenance access while preserving airflow.
• Is the MRK rack seismic certified? Yes. The MRK series is designed to meet seismic certification requirements to help protect equipment in compliant installations.
• What are the key dimensions I should know? The rack is 22" wide and 26" deep, with 40U of rack space. Height is determined by the 40U configuration, typically accommodating multiple equipment rows.
• What accessories or enhancements work with this rack? The MRK series supports standard 19" rack equipment and a range of Middle Atlantic accessories, such as additional doors, venting options, cable management components, and mounting rails, allowing for customized solutions in multi-bay projects.