Middle Atlantic 44SP/42D Multibay RK PRO - MRK-4442PRO

Middle Atlantic MRK-4442PRO 44RU Pro Floor-Standing Open-Frame Rack

Overview

The Middle Atlantic MRK-4442PRO is a 44RU, 42-inch-deep floor-standing rack enclosure built for high-density AV, security, and IT deployments where structural integrity and long-term load performance are non-negotiable. At 2,500 lbs UL-rated load capacity with a static weight capacity of 10,000 lbs, this frame handles fully populated NVR stacks, UPS systems, patch infrastructure, and dense switching without flexing or racking — literally. The 39.6-inch usable depth (100.6 cm) accommodates deep server and NVR chassis that a standard 24-inch rack would reject. Frame-only configuration means you provision the doors, blanks, and cable management to match your exact install — no paying for panels you'll remove on day one. TAA compliant and manufactured in the USA, making it eligible for federal, state, and government-contract procurement where country-of-origin verification is required. Sourced factory-new from the manufacturer.

Compatibility

Accepts any standard 19-inch EIA-310 panel or rackmount equipment via cage nut rails — compatible with Middle Atlantic Middle Atlantic rack accessories, as well as third-party rack enclosures and mounting hardware from any vendor conforming to the 19-inch rack standard. The 77.13-inch usable height (195.9 cm interior) accommodates full-height network video recorders, multi-bay storage arrays, and AV distribution equipment without modification. Gangable design allows side-by-side joining of multiple MRK-4442PRO units — useful in control rooms or operations centers where rack rows need structural continuity. The rear door is included; side panels are not included in the frame-only SKU. Seismic rating to ASCE 7-10 qualifies this rack for installations in seismic zones where rack anchoring and seismic compliance are mandated by local building codes or IT infrastructure standards.

Installation Notes

Ships at 190 lbs — plan for a two-person minimum on the floor placement. The 22-inch overall width and 42-inch depth require pre-measuring doorways and corridors before delivery; the unit does not disassemble for narrow passages beyond standard flat-pack configuration. Cage nut rail type: install cage nuts before racking equipment — a cage nut tool is recommended for dense builds. Confirm floor load ratings at the installation site before deploying at full 2,500 lb UL load; 10,000 lb static capacity assumes a structurally adequate concrete or reinforced floor. For seismic compliance under ASCE 7-10, anchor kit selection must match local seismic zone — consult Middle Atlantic seismic anchor kits for compatible hardware.