Middle Atlantic 42in. Outside Depth Multibay Rack ***Drop Ship Only*** - MRK-4442

Middle Atlantic MRK-4442 44RU 42-Inch Deep Floor Standing Rack

Overview

The Middle Atlantic MRK-4442 is a 44RU, 42-inch outside-depth floor rack built for dense AV, security, and IT infrastructure deployments where deep equipment — long NVRs, full-depth servers, high-density patch panels — needs a frame that won't compromise on usable space or structural integrity. At 39.6 inches of usable depth and a UL-listed 2500 lb load rating, this rack handles serious hardware without apology. It ships as a frame-only configuration, giving integrators the flexibility to spec the exact shelving, cable management, and blanks the job actually requires. Manufactured in the USA and TAA compliant, the MRK-4442 (often searched as MRK 4442) is a straightforward choice for federal projects and government-adjacent deployments with country-of-origin requirements.

Browse the full Middle Atlantic rack and enclosure line for compatible accessories, or explore the floor standing rack category to compare depth and RU options side by side.

Key Features

• 44RU Usable Height (77.13 in / 195.9 cm): Forty-four rack units gives you room to consolidate NVRs, switches, UPS units, patch panels, and servers into a single enclosure — reducing floor footprint without forcing equipment splits across multiple racks.
• 42-Inch Outside Depth / 39.6-Inch Usable Depth: Nearly 40 inches of usable rail-to-rail depth accommodates full-depth 1U/2U servers and long-chassis NVRs that 30-inch racks simply cannot fit. If you're deploying high-channel NVRs with rear I/O clearance requirements, this depth matters.
• UL-Listed 2,500 lb Load Capacity: The UL-listed static load rating covers even fully populated dense configurations. The stated weight capacity of 10,000 lbs reflects the structural frame limit — the UL figure (2,500 lbs) is what you plan to.
• Seismic Rated to ASCE 7-10: The rack meets ASCE 7-10 seismic load requirements, which is a hard requirement for California and other high-seismic jurisdictions. If your AHJ requires seismic documentation, this rating supports that submittal directly.
• 19-Inch Panel Width / 10-32 Rack Rail: Standard 19-inch EIA rack rails with 10-32 threaded holes accept virtually all commercial rack-mount equipment without adapters — no cage nuts required, which speeds installation when you're populating dozens of RUs.
• Rear Door Included: A rear door comes standard, providing basic cable and equipment protection without a separate accessory purchase. Side panels are not included — factor this in if the installation environment requires full enclosure.
• Gangable Design: The MRK-4442 is gangable, meaning multiple units can be bolted together side-by-side for multi-bay deployments. This is the right architecture for large security operations centers or server rooms where a single rack won't hold the full infrastructure.
• TAA Compliant / Made in USA: Federal procurement, GSA schedules, and government contracts with TAA or Buy American requirements are satisfied. Country of origin is USA — verifiable for compliance documentation.

Integration and Compatibility

The frame-only configuration pairs with Middle Atlantic's full accessory ecosystem: rack shelves, blanking panels, and cable management install directly. The 10-32 rail standard means off-the-shelf rackmount equipment from any manufacturer fits without modification. The 22-inch overall width is standard for side-by-side installation in raised floor environments. Plan your PoE switch and patch panel layout against the 39.6-inch usable depth when specifying rear-mounted network gear — leave adequate service loop clearance behind deep chassis equipment.

Frequently Asked Questions

Q: Is the MRK-4442 TAA compliant?

A: Yes. The MRK-4442 is TAA compliant and manufactured in the USA, satisfying federal procurement and GSA contract requirements.

Q: What is the UL-listed load capacity of the MRK-4442?

A: The UL-listed load capacity is 2,500 lbs (1,134 kg). The structural frame weight capacity is rated at 10,000 lbs, but 2,500 lbs is the figure to use for equipment planning.

Q: Does the MRK-4442 meet seismic requirements?

A: Yes. It is seismic rated and UL listed for seismic load capacity per ASCE 7-10, which satisfies AHJ requirements in seismic zones including California.

Q: Does the MRK-4442 include side panels?

A: No. The MRK-4442 ships as a frame-only configuration with a rear door. Side panels are not included and must be ordered separately if full enclosure is required.

Q: Can multiple MRK-4442 units be ganged together?

A: Yes. The rack is gangable, supporting side-by-side multi-bay configurations for larger deployments.

Q: What rack rail standard does the MRK-4442 use?

A: Standard 10-32 threaded rack rails — no cage nuts needed. All standard 19-inch EIA rackmount equipment installs directly.

Ted Perry

The spec I keep coming back to on the MRK-4442 is the 39.6 inches of usable depth. Most integrators underestimate how fast a 30-inch rack becomes a liability once you're mixing full-depth NVRs, 2U servers, and a properly sized UPS — you run out of rear clearance before you run out of RUs. This frame eliminates that problem entirely, and the 44RU height means you're not splitting infrastructure across two racks just to handle a mid-sized security head-end.

Technical Highlights:

• 2,500 lb UL-Listed Load: UL listing matters here — it's the figure your structural engineer or AHJ will ask for, not the 10,000 lb frame spec. Plan your rack population against the 2,500 lb number and you're on solid ground for permit submittals.
• ASCE 7-10 Seismic Rating: This isn't a marketing claim — it's a UL-listed seismic load capacity to a named standard. In California and other Zone 3/4 jurisdictions, this is often a hard permit requirement. Having the documentation at spec time saves project delays.
• 10-32 Threaded Rails: Speeds installation compared to cage-nut systems — particularly meaningful when you're populating 30+ RUs in a single pull. Every major rackmount vendor's gear fits without adapters.

Deployment Considerations:

• The MRK-4442 ships frame-only with a rear door but no side panels — if the installation is in a shared space (an IT closet, a lobby equipment room) where physical security of the rack interior matters, budget side panels separately before the order closes.
• At 190 lbs shipping weight, this rack requires two-person handling and a freight delivery — confirm dock access and lift equipment at the site before scheduling delivery, especially on retrofit installs in occupied buildings.

For a large physical security head-end — 32+ channel NVR, managed PoE switch stack, access control server, and UPS in a single enclosure — the MRK-4442 is the rack to spec. The depth, load rating, and seismic certification close the three questions that most commonly stall security room equipment approvals.