Middle Atlantic 828DLRAL Single Locking Aluminum Cover Plate
Overview
The Middle Atlantic 828DLRAL is a single locking cover plate engineered for concrete floor box installations where a low-profile, durable finish is required. At just 0.25 inches tall, this aluminum cover sits nearly flush with the floor surface — eliminating trip hazards in high-traffic commercial environments like conference rooms, trading floors, and open-plan office deployments. If you're finishing a floor box installation in a concrete slab and need a cover that holds position under foot traffic without telegraphing hardware above the surface, the 828DLRAL is the component to reach for.
Middle Atlantic has built its reputation across the AV and infrastructure space on products that integrators can spec with confidence. This cover is part of their broader Middle Atlantic floor box line — designed to coordinate with their concrete floor box ecosystem so you're not mixing hardware from mismatched product families.
Key Features
- Aluminum Construction: The aluminum finish provides a professional appearance that holds up under repeated foot traffic without corroding or staining — relevant in commercial lobbies or server rooms where aesthetics and longevity both matter.
- Ultra-Low Profile (0.25 in / 0.6 cm Height): A quarter-inch above the floor surface means this cover is effectively flush-mount. That's the difference between a clean installation and a code-compliance conversation about trip hazards in ADA-sensitive spaces.
- 3.13 in x 4.13 in Footprint: The 3.13-inch width and 4.13-inch depth are sized to coordinate with Middle Atlantic's single concrete floor box series — verify your box model matches these cover dimensions before ordering to avoid a second trip to the site.
- Locking Design: The locking mechanism keeps the cover secured against casual displacement — important in environments where custodial staff or foot traffic could inadvertently open an unsecured cover, exposing live receptacle connections below.
- Single Receptacle Configuration: Designed for single-outlet floor box applications. If your box requires dual-outlet coverage or a combination power/data plate, this cover is not the right fit — check the Middle Atlantic cover family for the appropriate configuration.
- TAA Non-Compliant: This cover is not TAA compliant. If your project falls under GSA schedule requirements or federal procurement rules requiring TAA-compliant components, verify your sourcing path before specifying the 828DLRAL — TAA status applies to the entire bill of materials on covered contracts.
Integration & Compatibility
The 828DLRAL is designed for use with Middle Atlantic's concrete floor box product line. Before installing, confirm the floor box model's cover plate opening dimensions match the 828DLRAL's 3.13 in x 4.13 in profile. Mismatched cover-to-box pairings are one of the most common rework causes on floor box installations — a few minutes verifying compatibility against the Middle Atlantic floor box catalog saves a return visit. This cover does not include receptacle hardware; the underlying outlet and wiring are part of the floor box assembly, not this component.
For integrators managing rack and enclosure infrastructure alongside floor box installations, Middle Atlantic's coordinated product line allows consistent material specifications across both vertical and horizontal power distribution components in the same project.
Frequently Asked Questions
Q: What are the dimensions of the 828DLRAL cover plate?
A: The 828DLRAL measures 3.13 inches wide (8 cm), 4.13 inches deep (10.5 cm), and 0.25 inches tall (0.6 cm). It is designed for a near-flush floor installation profile.
Q: Is the 828DLRAL TAA compliant?
A: No. The 828DLRAL is not TAA compliant. If your project requires TAA-compliant components — such as federal government or GSA schedule work — you will need to source an alternative cover plate that meets those requirements.
Q: What material is the 828DLRAL made from?
A: The cover plate is aluminum, providing a durable, corrosion-resistant finish suitable for commercial floor installations subject to regular foot traffic.
Q: Does the 828DLRAL include a receptacle or wiring hardware?
A: No. The 828DLRAL is a cover plate only. Receptacle hardware and wiring are part of the floor box assembly and are not included with this cover.
Q: Will the 828DLRAL work with any floor box, or only Middle Atlantic boxes?
A: The 828DLRAL is engineered for Middle Atlantic's concrete floor box line. Before specifying it for a third-party floor box, verify that the box's cover plate opening matches the 828DLRAL's 3.13 in x 4.13 in footprint exactly — dimensional mismatches are a common installation problem when mixing manufacturers.
The 828DLRAL does one job and does it correctly: it closes out a single concrete floor box with a locking aluminum cover that sits 0.25 inches above the slab — low enough that it's not a trip hazard, strong enough that foot traffic won't flex or crack it over time. I specify this cover when the floor box installation needs to disappear into the floor rather than announce itself.
Technical Highlights:
- 0.25 in Profile: At a quarter-inch above finished floor, this is as close to flush as you get without a recessed cover — the right call for ADA-sensitive commercial spaces where any raised surface requires documentation.
- Aluminum Finish: Aluminum holds up under repeated load cycles that would crack plastic covers — and it won't corrode in the occasional wet-mop environment you find in commercial lobbies and open office floors.
- Locking Mechanism: The lock prevents the cover from being kicked open accidentally or pried up by custodial carts — a real-world problem on unsecured covers that exposes live 30A receptacles to contact.
Deployment Considerations:
- Verify your concrete floor box model's cover plate cutout matches 3.13 in x 4.13 in before ordering — Middle Atlantic makes multiple box configurations and cover sizes are not universal across the line.
- The 828DLRAL is not TAA compliant; flag this during the BOM review on any government or federally funded project, not after the components ship to site.
This cover is the right finish component for commercial conference rooms, AV-equipped training spaces, and open trading floors where a clean, locked, near-flush floor outlet is a design requirement — not an afterthought.
