Middle Atlantic STL DP FLR BX SGL SRV - 886B

Middle Atlantic 886B Stamped Steel Single-Service Concrete Floor Box

Overview

The Middle Atlantic 886B is a stamped steel single-service floor box designed for installation in concrete floors, delivering a compact, low-profile solution for routing power and low-voltage connections in commercial environments. At 4.8 in × 4.8 in × 2.75 in deep, the 886B fits a tight footprint without compromising wiring access — a practical choice for conference rooms, open-plan offices, and AV presentation spaces where cable management needs to be flush with the finished floor. TAA compliance makes it eligible for government and federally funded projects subject to Trade Agreements Act sourcing requirements. For a broader look at the Middle Atlantic product line, including rack infrastructure and cable management, the full catalog covers coordinated AV and security installations.

Key Features

• Compact 4.8 in square footprint: the 4.8 in × 4.8 in × 2.75 in profile drops into standard concrete cutouts without requiring an oversized core drill — minimizing slab disruption during new construction or retrofit installations.
• Single-service configuration: purpose-built for one service outlet position, keeping the box small and the install straightforward when a single power or data drop is all a location requires — no empty bays to cap off.
• Stamped steel construction: commercial-grade steel body handles the mechanical load of a concrete pour and the traffic of a finished floor environment — appropriate for light commercial foot-traffic zones.
• TAA compliant: qualifies for GSA schedule procurement and federally funded construction projects where TAA-compliant components are a contract requirement. Verify the specific contract vehicle with your procurement team before spec'ing.
• Low 2.75 in depth: at 7 cm deep, the 886B suits thinner concrete slabs where a deeper box simply won't fit — useful in renovation projects where slab depth is constrained.

Integration & Compatibility

The 886B is designed to work within Middle Atlantic's floor box ecosystem. Confirm cover plate and service insert compatibility with your specific outlet or data module before ordering — the single-service form factor accepts inserts matched to the 886B's opening dimensions. Pair with appropriate AV infrastructure accessories for a complete low-voltage floor assembly. When planning structured cabling runs, account for the 2.75 in depth when routing conduit or flex to the box from below the slab. For installations requiring multiple service positions at a single floor location, consider a larger multi-gang variant in the Middle Atlantic floor box family rather than clustering multiple 886B units.

Frequently Asked Questions

Q: Is the Middle Atlantic 886B TAA compliant?

A: Yes. The 886B carries TAA (Trade Agreements Act) compliance, making it eligible for GSA schedule and federally funded projects with TAA sourcing requirements.

Q: What are the dimensions of the 886B?

A: The 886B measures 4.8 in wide × 4.8 in deep × 2.75 in tall (12.2 cm × 12.2 cm × 7 cm). This compact profile suits installations in thinner concrete slabs.

Q: How many service positions does the 886B support?

A: The 886B is a single-service floor box, accommodating one outlet or data insert position.

Q: What material is the 886B box body made from?

A: The 886B is constructed from stamped steel, providing commercial-grade durability suited to concrete floor installations.

Q: Can the 886B be used in retrofit concrete floor projects?

A: Yes. Its compact 4.8 in footprint and 2.75 in depth make it practical for retrofit cores in existing slabs where deeper or larger boxes won't fit.

Eden Phillips

The Middle Atlantic 886B comes up regularly in commercial AV and security rough-in specs precisely because its 2.75 in depth clears the bar for thinner poured slabs — a dimension that trips up deeper boxes in retrofit situations. If you're coordinating a floor-level connection point in a conference room or lobby, the 886B's 4.8 in square footprint keeps the core drill small and the finished cover plate unobtrusive.

Technical Highlights:

• 4.8 in × 4.8 in footprint: fits a compact core without requiring structural slab assessment for oversized cutouts — relevant in renovation work where the structural engineer hasn't been re-engaged.
• 2.75 in depth: at 7 cm, this is one of the shallower options in the concrete floor box category — critical when post-tension slab constraints limit how deep you can go.
• TAA compliance: directly affects procurement eligibility on government facilities, higher-ed, and federal agency projects — verify the contract vehicle before the box goes on the spec sheet.

Deployment Considerations:

• Single-service means one insert position — if a location needs both power and data at the same floor point, spec a multi-gang box from the start rather than cutting a second core adjacent to the first.
• Confirm cover plate and service insert compatibility before ordering; the 886B's opening dimensions must match the specific outlet or data module you're installing — Middle Atlantic offers matched covers, but verify against current product families.

The 886B is the right call for a single low-voltage or power drop in a thin-slab commercial space — conference rooms, museum floors, hospitality lobbies — where footprint and depth constraints rule out larger boxes.