Middle Atlantic MRK-4436LRD 44U Open-Frame Floor Rack
Overview
The Middle Atlantic MRK-4436LRD is a 44-rack-unit, 36-inch-deep open-frame floor rack designed for high-density AV, security, and IT equipment installations where structural integrity and serviceability are non-negotiable. At 22 inches wide and 83.13 inches tall, this frame accommodates a full 77.13 inches of usable height — all 44 RU — across 33.6 inches of usable depth. The 10-32 rail threading is compatible with the vast majority of rackmount hardware in enterprise AV and security deployments. Frame-only configuration means you specify and source side panels, doors, and blanks to match your enclosure requirements. TAA compliant and manufactured in the USA, MRK-4436LRD is appropriate for government and federally funded projects with domestic-sourcing requirements.
Compatibility
Designed for standard 19-inch rackmount equipment using 10-32 threaded rails — compatible with NVRs, video management servers, network switches, patch panels, power distribution units, and AV processing gear from virtually any vendor conforming to the EIA-310 rack standard. Pairs naturally with Middle Atlantic power distribution, cable management, and shelving accessories. The 36-inch total depth (33.6 inches usable) accommodates deep 2U and 4U servers and NVR appliances that exceed the capacity of shallower 24-inch frames — a practical consideration when housing enterprise-grade network video recorders or storage expansion units. The gangable design allows adjacent frames to be bolted together for multi-bay installations without gaps. For power distribution planning within the frame, the 2,500 lb UL-listed load capacity and 10,000 lb static weight capacity leave substantial headroom for fully populated, high-density builds.
Installation Notes
Seismic rating: UL listed for seismic load capacity per ASCE 7-10 — required for deployments in seismic zones or where code mandates rated enclosures. Verify local code compliance before specifying a non-rated alternative. Frame only: no rear door, no side panels included — plan enclosure accessories separately. Shipping weight is 142 lbs; confirm freight access before delivery. Gangable side-by-side with other MRK-series frames for multibay rows; consult rack installation guidance for anchor and leveling foot requirements on raised or uneven floors.
