Middle Atlantic MRK-4431 44U Gangable Floor-Standing Rack with Rear Door
Overview
The Middle Atlantic MRK-4431 is a 44-space (77.13 in. usable height), 31 in. deep gangable floor rack finished in black, built for AV, security, and IT infrastructure deployments where load capacity and seismic compliance are non-negotiable requirements. At a 2,500 lb UL-rated load capacity and a 10,000 lb static weight capacity, the MRK-4431 handles dense equipment builds — fully populated NVR shelves, UPS units, and multi-channel amplifiers — without flexing the frame. Gangable construction means multiple MRK-4431 units bolt together side-by-side to form a continuous rack row, eliminating unsightly gaps and maintaining structural integrity across the assembly. The included rear door provides cable management access control and equipment security without requiring a separate enclosure purchase. TAA compliant and manufactured in the USA, the MRK-4431 is procurement-eligible for federal, state, and education contracts. Seismic rating to ASCE 7-10 makes it suitable for facilities in seismic zones where standard racks would require additional engineering review.
Compatibility
The MRK-4431 accepts any Middle Atlantic 19 in. panel-width equipment on standard 10-32 rack rails, covering the full range of Middle Atlantic MRK-series accessories including shelf kits, blanking panels, cable management bars, and power distribution units sized for this frame depth. The 31 in. total depth (29 in. usable) accommodates deep 1U/2U servers, high-density patch panels, and full-depth NVR chassis common in network video recorder deployments. Gangable side-panel attachment points are factory-drilled for direct mating with adjacent MRK-series enclosures — no adapter kits required. Compatible with standard rack-mount PDUs and horizontal cable managers that fit 19 in. EIA-310 rails.
Installation Notes
Frame-only configuration — side panels are not included and must be ordered separately if a fully enclosed appearance is required. Shipping weight is 154 lbs; plan for a two-person lift and verify floor load ratings before placement, particularly in raised-floor environments. The 22 in. overall width (19 in. panel width) governs aisle planning when ganging multiple units. Seismic compliance is rated to ASCE 7-10 — verify that your local jurisdiction accepts this standard before specifying for seismic-zone installations. Rack rail pattern is 10-32; verify that all intended equipment ships with 10-32 cage nuts or screws, as 12-24 hardware is not compatible without a rail conversion kit.
