Middle Atlantic MRK-4426-AV – 44SP AV Configured Gangable Rack, 26" Depth

Product Overview

The Middle Atlantic MRK-4426-AV is a 44-space pre-configured AV rack system built on the MRK Series welded steel enclosure platform, factory-configured for AV system deployment with integrated thermal management, cable management, and a 20-amp power distribution strip. Designed for commercial AV integrators and systems contractors, this gangable rack offers a 2,500 lb. weight capacity, UL Listing for the US and Canada, and seismic certification through Zone 4 ratings and OSHPD approval for California healthcare facilities. The 26" interior depth and fully welded construction make it a standard specification for boardroom, conference room, and large-scale multi-bay AV installations.

Product Description

The MRK-4426-AV is a factory-configured variant of Middle Atlantic's MRK Series rack, pre-equipped with the accessories most commonly specified for AV system integrations to reduce installation time and ensure consistent, repeatable rack builds. The enclosure features 16-gauge seamless steel sides and 14-gauge steel tops and bottoms, with laser-cut 1/8" internal steel braces providing structural rigidity under full equipment load. Two pairs of wider rack rails provide increased interior clearance for large AV components with rear connectors and cable bundles.

Thermal management is handled by an integrated fan top with proportional speed fan controller, which adjusts fan speed based on internal temperature to protect equipment and reduce noise in occupied spaces. The configurable rear door includes a bottom vent panel, while a solid locking front door secures equipment. A 3.25" wide vertical lacer strip, six horizontal lacer bars, and twelve 8" Velcro cable management straps are included for organized cable routing throughout the enclosure. Power distribution is handled by a thin 20-amp, 20-outlet corded power strip, providing ample outlets for fully populated AV racks.

The MRK-4426-AV includes leveling feet, 100 10-32 mounting hardware pieces, and a large cable entry in the bottom panel. Grounding and bonding stud is factory installed in the base. The configurable open top accepts a range of top options for additional thermal management or cable entry configurations. Ganging hardware is optionally available for multi-bay installations where adjacent racks must be mechanically coupled.

Key Features

• 44-Space (44U) Rack Capacity — Full 44U of rack space in a 26" deep enclosure for large-scale AV system deployments.
• Pre-Configured AV Package — Factory installed with fan top, lacer strips, lacer bars, cable straps, power strip, leveling feet, and mounting hardware for immediate deployment.
• Integrated Fan Top with Proportional Speed Controller — Adjusts fan speed based on internal temperature to protect equipment and minimize acoustic impact in occupied rooms.
• 2,500 lb. Weight Capacity — Fully welded construction supports heavy AV system loads including amplifiers, video matrices, and power conditioning equipment.
• UL Listed (US and Canada) — Listed for safety compliance in both US and Canadian commercial installations.
• Seismic Certification — Certified to UBC 1997, CBC 1998 Zone 4, IBC 2000, IBC 2003, ASCE 7-02, and NFPA 5000 Seismic Use Group III for 650 lbs. of essential equipment (with MRK-Z4 brackets).
• OSHPD Approved — Approved for fixed equipment anchorage in California healthcare facilities, meeting stringent state construction standards.
• Welded Steel Construction — 16-gauge seamless steel sides, 14-gauge tops and bottoms, and laser-cut 1/8" internal braces provide commercial-grade structural integrity.
• 20A / 20-Outlet Power Strip — Thin-profile corded power strip with 20-amp, 20-outlet capacity handles fully populated AV racks without additional PDU requirements.
• Comprehensive Cable Management — 3.25" vertical lacer strip, 6 horizontal lacer bars, and 12 Velcro cable straps provide organized routing for dense AV wiring.
• Gangable Design — Optional ganging hardware enables mechanical coupling of adjacent MRK racks for multi-bay AV installations.
• Multiple Knockout Configurations — 1/2", 3/4", 1", and 1-1/2" electrical knockouts on removable split rear plates plus UHF/VHF antenna knockouts on the top plate.

Typical Applications

• Corporate boardrooms and conference rooms
• Auditoriums and multipurpose AV systems
• Houses of worship with permanent AV installations
• Government and municipal AV infrastructure
• Higher education AV system deployments
• Healthcare facilities (OSHPD-approved installations)
• Broadcast studios and production facilities
• Multi-bay AV equipment rooms

Technical Specifications

Frequently Asked Questions

Q: What is included with the MRK-4426-AV out of the box?

A: The MRK-4426-AV ships pre-configured with an integrated fan top and proportional speed fan controller, configurable rear door with bottom vent, solid locking front door, 3.25" vertical lacer strip, 6 horizontal lacer bars, 12 Velcro cable straps, a 20A/20-outlet power strip, leveling feet, grounding/bonding stud, and 100 qty 10-32 mounting hardware.

Q: Is the MRK-4426-AV seismically rated?

A: Yes. The MRK-4426-AV is seismically certified to UBC 1997 and CBC 1998 Zone 4, IBC 2000, IBC 2003, ASCE 7-02, and NFPA 5000 Seismic Use Group III for protecting 650 lbs. of equipment when used with Middle Atlantic MRK-Z4 seismic brackets. It is also OSHPD approved for fixed equipment anchorage in California healthcare facilities.

Q: Can multiple MRK-4426-AV racks be ganged together?

A: Yes. Optional ganging hardware is available to mechanically couple adjacent MRK racks for multi-bay AV installations. Contact Creation Networks for ganging hardware pricing and configuration guidance.

Q: How is thermal management handled in the MRK-4426-AV?

A: The rack includes an integrated fan top with a proportional speed fan controller that automatically adjusts fan speed based on internal temperature, protecting equipment from heat damage while minimizing fan noise in occupied spaces.

Q: What rack rail thread is used?

A: The MRK-4426-AV uses standard 10-32 threaded rack rails. 100 qty 10-32 mounting screws are included.

Q: Is the MRK-4426-AV UL Listed?

A: Yes. The MRK-4426-AV is UL Listed for the US and Canada.

Q: Where can I order the MRK-4426-AV or request a quote?

A: The MRK-4426-AV is available through Creation Networks. Visit https://creationnetworks.net or contact our team for pricing, lead times, and AV system rack design support.