Middle Atlantic EFB45BTSB Evolution Series Flush Floor Box Cover with Solid Lid
Overview
The Middle Atlantic EFB45BTSB is the flush-mount solid lid cover for the Evolution Series EFB45 raised floor box — the finishing component that determines how a floor box looks and functions once it is installed in a finished floor. Where a grille or open cover leaves receptacles exposed, the EFB45BTSB ships with a solid lid that closes the box completely when not in use, protecting the receptacles from foot traffic, rolling equipment, and debris in active commercial environments. The satin brass finish integrates cleanly into hospitality, conference, and boardroom floors where a polished appearance is part of the design requirement. If you are specifying or replacing the cover on an EFB45 floor box, the EFB45BTSB is the flush solid-lid variant.
Key Features
- Flush Cover Style: sits level with the finished floor surface rather than projecting above it — eliminates a trip hazard in high-traffic areas like conference rooms, trading floors, and hotel event spaces where foot traffic crosses the box location constantly.
- Solid Lid: fully closes the receptacle cavity when not in use, keeping dust, spilled liquids, and rolling cart wheels out of the box interior. Open-grille covers leave receptacles exposed; this lid does not.
- Satin Brass Finish: the warm metallic finish reads as intentional design rather than utilitarian hardware — appropriate for boardrooms, hospitality venues, and renovation projects where the floor finish is a specified material (stone, hardwood, carpet tile) and a chrome or brushed-aluminum cover would look out of place.
- Standard Receptacle Type: compatible with standard receptacle configurations in the EFB45 Evolution Series box — no specialty wiring or non-standard outlet modules required, keeping the installation straightforward for any licensed electrician familiar with the platform.
- TAA Compliant: the EFB45BTSB meets Trade Agreements Act requirements, making it eligible for federal government projects, GSA schedules, and any contract vehicle that mandates TAA-compliant components throughout the infrastructure build-out.
Integration and Compatibility
The EFB45BTSB is purpose-built for the Middle Atlantic Evolution Series EFB45 raised floor box platform. It is the cover assembly for that specific box family — do not attempt to fit it to non-EFB45 floor box brands or depths, as cover-to-box fit is model-specific. When specifying a complete floor box assembly for an AV or power distribution project, confirm the EFB45 box body, the appropriate insert modules (power, data, AV), and this cover are all on the same bill of materials. The satin brass finish should be confirmed against the floor finish and other hardware finishes in the space before ordering — Middle Atlantic offers the Evolution Series cover in multiple finishes, so consult the Middle Atlantic floor box lineup if the project requires a different color. For broader AV infrastructure and rack system planning that includes floor box placement, this cover pairs with the full EFB45 assembly as one line item in the finish schedule. Integrators specifying TAA-compliant AV buildouts for government facilities should note the TAA status confirmed for this SKU and verify all other floor box components in the same family carry equivalent compliance.
Frequently Asked Questions
Q: Is the EFB45BTSB TAA compliant?
A: Yes. The EFB45BTSB is TAA compliant, making it eligible for federal government contracts, GSA schedule orders, and other procurement vehicles that require Trade Agreements Act compliance.
Q: What floor box is the EFB45BTSB designed to fit?
A: The EFB45BTSB is the flush solid-lid cover for the Middle Atlantic Evolution Series EFB45 raised floor box. It is purpose-matched to that box family and should not be assumed compatible with other floor box brands or models.
Q: What does the flush cover style mean for installation?
A: Flush means the cover sits level with the finished floor surface when closed. This eliminates any protrusion above the floor, removing a trip hazard in high-foot-traffic environments like conference rooms and event spaces.
Q: What finish is the EFB45BTSB available in?
A: This specific model ships in satin brass. Middle Atlantic offers the Evolution Series cover in multiple finishes — confirm the correct finish variant against your project's hardware and floor finish specifications before ordering.
Q: Does the EFB45BTSB cover the receptacles completely when closed?
A: Yes. The solid lid design fully encloses the receptacle cavity when the cover is closed, protecting outlets from dust, debris, and foot traffic. This is distinct from open-grille covers that leave receptacles partially exposed.
The EFB45BTSB is the detail that closes out a floor box installation cleanly — the flush solid-lid cover for Middle Atlantic's Evolution Series EFB45 box in satin brass. In my experience specifying AV infrastructure for commercial interiors, the cover finish and style are often afterthoughts on the BOM until a GC or interior designer flags them during finish review. Getting the EFB45BTSB specified early locks in the flush profile and the satin brass color before the floor goes down.
Technical Highlights:
- Flush Cover Style: level with the finished floor when closed — no raised lip, no trip hazard, appropriate for any finished floor type including polished concrete, hardwood, or carpet tile where a surface-mount cover would be unacceptable.
- Solid Lid: fully encloses the receptacle bay versus open-grille alternatives — relevant wherever foot traffic, rolling carts, or cleaning equipment regularly cross the box location.
- TAA Compliant: confirmed for this SKU, which matters on federal builds and GSA-schedule AV projects where every line item on the finish schedule needs a TAA-compliant paper trail.
Deployment Considerations:
- The EFB45BTSB is cover-only — it ships without the EFB45 box body or insert modules. Verify the full assembly (box, inserts, cover) is on the BOM before submitting a finish schedule to avoid a field shortage on closeout day.
- Satin brass is a specific finish — Middle Atlantic produces this cover family in multiple colorways. If the project spec calls for brushed nickel, oil-rubbed bronze, or black, you need a different model number; swapping covers post-installation on a finished floor is a nuisance job.
The EFB45BTSB is the right call for hospitality renovations, corporate boardrooms, and government conference facilities where the floor box needs to disappear into the finish plane and TAA compliance is a contract requirement.
