Middle Atlantic MRK-4026LRD 40U Open-Frame AV Equipment Rack
Overview
The MRK-4026LRD is a 40-rack-unit, 26-inch-deep open-frame equipment rack built for AV, security, and IT infrastructure deployments where airflow and front/rear equipment access matter more than door security. At 76.13 inches tall with 70.13 inches of usable height, it accommodates a full-height loadout of NVRs, patch panels, power management, and video management servers without dead space. The frame-only configuration ships without side panels or a rear door — appropriate for conditioned equipment rooms and head-end closets where cable routing and technician access take priority over enclosure. The MRK-4026LRD is TAA-compliant and manufactured in the USA, making it eligible for federal, state, and GSA-schedule procurement without exception processing.
Compatibility
Accepts any Middle Atlantic or standard 19-inch panel equipment using 10-32 rack rail threading — the universal standard for AV and security equipment racks. The 24-inch usable depth accommodates deep 1U/2U NVR chassis, UPS units, and high-density patch bays without rear-rail extensions. The gangable frame design allows side-by-side rack arrays for large control room or NVR head-end builds where multiple racks share a common footprint. Side panels and rear doors are available as separate Middle Atlantic accessories if enclosure is later required — the base frame accepts them without structural modification.
Installation Notes
UL-listed load capacity is 2,500 lbs (1,134 kg) — sufficient for fully populated NVR arrays with attached storage. Static weight capacity reaches 10,000 lbs (4,535.9 kg), relevant for permanent anchored installations. Seismic rating meets ASCE 7-10 standards, qualifying this rack for deployments in seismic zones where local code requires rated infrastructure — confirm AHJ requirements before substituting an unrated alternative. Shipping weight is 122 lbs; plan for two-person installation and verify floor load ratings before committing to rack placement in raised-floor environments.
