Middle Atlantic MRK-4426 44U 26-Inch Deep Floor-Standing Rack with Rear Door
Overview
The Middle Atlantic MRK-4426 is a 44U, 26-inch deep floor-standing open-frame rack designed for AV, security, and IT infrastructure buildouts that need serious load capacity in a seismic-rated enclosure. This unit ships as a frame-only configuration — no side panels — giving integrators clean lateral access during installation and cable routing flexibility once deployed. The MRK-4426 ships at 145 lbs and occupies a 22-inch-wide footprint with a 77.13-inch usable rack height, accommodating 44 rack units of gear on standard 10-32 threaded rail. The rear door is included, protecting the back of the stack while maintaining front accessibility. Domestic origin (USA) supports Middle Atlantic procurement requirements on government and federal contracts — this unit is TAA compliant. For integrators spec'ing floor-standing racks into high-density security or surveillance head-end rooms, the 10,000 lb static weight capacity and 2,500 lb UL-listed dynamic load rating make it suitable for fully loaded NVR, server, and switch stacks without floor reinforcement concerns in most commercial slab construction.
Compatibility
Accepts any standard 19-inch EIA-310 rackmount equipment — 1U through 14U — including network video recorders, managed PoE switches, patch panels, KVM drawers, UPS units, and fiber distribution hardware. The 10-32 threaded rail type is compatible with the majority of commercial rackmount equipment shipped today; cage nuts are not required. The 24-inch usable depth (26-inch nominal) accommodates deep 1U/2U servers and full-depth NVR chassis without modification. The gangable design allows side-by-side installation of multiple MRK frames where rack density demands it. For deployments requiring rack accessories such as cable management arms, blanking panels, or PDUs, standard Middle Atlantic and third-party 19-inch accessories install without adapter hardware. Consult a rack planning guide to calculate usable RU headroom against planned equipment loads before finalizing depth selection.
Installation Notes
Frame-only configuration: side panels are not included and must be ordered separately if the deployment requires an enclosed cabinet. The seismic rating meets ASCE 7-10 standards — relevant for California Title 24, government facilities, and any AHJ requiring seismic compliance documentation. Verify floor load ratings before installing at full 2,500 lb UL capacity. The 145 lb shipping weight requires two-person lift for positioning; plan for dock or freight delivery on most commercial installs. Rear door is included but verify door swing clearance (22-inch rack width plus door travel) against room layout before finalizing rack placement.
