Middle Atlantic MRK-4431PRO – 44U 31 in. Deep Rack, Cage Nut Rails

Product Overview

The Middle Atlantic MRK-4431PRO is a 44-space, 31-inch-deep MRK Series 22-inch-wide rack equipped with PRO cage-nut server rails, built for installations that mix rack-mount servers with commercial AV equipment. The cage-nut rail geometry accepts server rail kits, including HPE ProLiant-style slide rails, without adapter hardware. Its multibay frame gangs side-by-side with other MRK racks, supporting unified rack rows in equipment rooms and data closets. With 77 inches of usable mounting height, it handles high-density server and AV integration in a single enclosure.

Product Description

The MRK-4431PRO delivers 44 rack spaces at a 31-inch interior depth in Middle Atlantic's 22-inch-wide MRK frame, giving extra lateral room for cable management alongside mounted equipment. The PRO designation indicates cage-nut rails: square mounting holes that accept the cage-nut hardware and slide-rail kits standard on enterprise servers such as HPE ProLiant models, so server installation proceeds without rail adapters. The 31-inch depth suits the majority of 1U and 2U server form factors while keeping a more compact footprint than deeper MRK configurations. Welded steel construction maintains rail squareness under full 44-space loading, which directly affects slide-out server serviceability over the life of the installation. The multibay design gangs with adjacent MRK racks to form continuous rows for enterprise equipment rooms and campus head-ends. Open top and bottom entries support overhead or underfloor cable routing, and the frame accepts the full MRK accessory ecosystem, including doors, side panels, and fan tops ordered separately. For AV integrators, this rack bridges IT and AV requirements in converged commercial deployment projects where control processors, network switches, and servers share one bay. Standard equipment using common rack hardware can be installed alongside server gear; confirm rail compatibility for mixed equipment loads before ordering. The MRK-4431PRO is in stock at Creation Networks, with the complete Middle Atlantic rack lineup.

Key Features

• 44 Rack Spaces (77 in. Usable Height) — High-density capacity for combined server and AV equipment installation.
• 31-Inch Interior Depth — Fits most 1U and 2U enterprise servers with a compact equipment-room footprint.
• PRO Cage-Nut Rails — Square-hole rails accept server slide-rail kits, including HPE ProLiant-style hardware, without adapters.
• 22-Inch-Wide MRK Frame — Extra lateral space simplifies vertical cable management and service loops.
• Multibay Gangable Design — Joins with adjacent MRK racks for continuous equipment-room rack rows.
• Welded Steel Construction — Maintains rail alignment under full loading for reliable slide-out serviceability.
• Open Top and Bottom Cable Entry — Supports overhead or underfloor structured cabling paths.
• MRK Accessory Compatible — Accepts MRK doors, side panels, and thermal management options.

Typical Applications

• Government space server and AV equipment rooms
• Broadcast studio IT and media server racks
• Commercial meeting space centralized AV and network head-ends
• Auditorium equipment rooms with mixed server and DSP loads
• Training room and campus technology closets

Technical Specifications

Frequently Asked Questions

Which servers are compatible with the MRK-4431PRO cage-nut rails?

The PRO rails use square cage-nut mounting holes that accept standard server slide-rail kits, including HPE ProLiant-style hardware. Verify your specific server model's rail kit requirements with Creation Networks before ordering.

Can I mount standard AV equipment in this rack as well?

Yes. Standard rack-mount AV equipment installs alongside servers using cage-nut hardware. Confirm the hardware mix for your equipment list with Creation Networks.

Does the MRK-4431PRO include doors or side panels?

Doors, side panels, and thermal accessories for the MRK series are ordered separately. Creation Networks can match compatible options to this 44-space, 31-inch-deep frame.

Can this rack be ganged with other MRK racks?

Yes. The multibay frame joins side-by-side with other MRK series racks to build continuous rack rows in equipment rooms.

Is the 31-inch depth enough for enterprise servers?

The 31-inch interior depth accommodates the majority of current 1U and 2U server models. For unusually deep chassis, confirm dimensions or consider a deeper MRK configuration.

What warranty covers this rack?

The MRK-4431PRO is backed by Middle Atlantic's manufacturer warranty. Contact Creation Networks for current terms and registration support.

Does Creation Networks help with rack configuration for integration projects?

Yes. Creation Networks supports AV integrators and IT teams with accessory selection, ganging layouts, and pre-sale design questions for Middle Atlantic systems.