Middle Atlantic ERK-4028LRD 40U Open-Frame Floor-Standing Equipment Rack
Overview
The ERK-4028LRD is a 40-rack-unit, open-frame floor-standing rack built for AV, security, and IT infrastructure deployments where rear-door access isn't required and maximum airflow is the priority. At 28 inches deep (26.47 in usable) and 22 inches wide overall, this steel frame accommodates standard 19-inch panel-width equipment and handles dense, heavy loads — the UL-listed load capacity is 2,500 lbs, making it a legitimate choice for populated NVR shelves, UPS units, or stacked amplifiers without worrying about frame deflection. ERK-4028LRD ships flat for easier freight handling and is manufactured in the USA, making it TAA-compliant for government and federally funded projects. The black wrinkle powder-coat finish holds up in equipment rooms that see regular access. No rear door means faster cable routing and better natural convection in high-density builds — if your thermal management relies on blanking panels and front-to-back airflow rather than contained hot-aisle/cold-aisle, this frame fits that model cleanly.
Compatibility
Accepts any standard 19-inch rackmount equipment using 10-32 threaded rack rails — the industry-standard thread for AV and security hardware. Compatible with the full range of Middle Atlantic rack accessories including horizontal cable managers, vertical cable trays, rack shelves, and blanking panels designed for the ERK series. Fits standard rack accessories and mounting hardware from third-party vendors that conform to EIA-310 19-inch panel width and 10-32 rail specifications. The 26.47-inch usable depth accommodates most 1U–4U NVRs, patch panels, and AV signal processors without extension rails. At 40U, the frame pairs well with network video recorders, managed PoE switches, and associated power distribution in a single enclosure. Seismic load capacity rating makes it suitable for deployments subject to UPS and power distribution compliance requirements in seismically active zones.
Installation Notes
At 108.1 lbs unloaded (140 lbs shipping weight), two-person installation is practical. The frame does not ship assembled — plan for on-site build time. No rear door is included and none is available as a factory option on this configuration; if rear door containment is required, specify an alternate ERK variant. The 10-32 rail thread requires 10-32 cage nuts and screws — confirm your rack hardware kit includes the correct thread before installation. Overall height is 74.13 inches (70.13 in usable), so verify ceiling clearance and overhead cable tray routing before positioning.
