Middle Atlantic EVO 8GNG Flrbx ON Grade - EFB8S-OG

Middle Atlantic EFB8S-OG Evolution Series On-Grade Raised Floor Box

Overview

The Middle Atlantic EFB8S-OG is an on-grade raised floor box from the Evolution Series floor box line, designed for installations where infrastructure connectivity must be routed cleanly through the floor surface. At 12.75 in wide × 6 in tall × 16.13 in deep (32.4 × 15.2 × 41 cm), the EFB8S-OG provides the interior volume needed to house multi-port connectivity modules, conduit entries, and cable management without forcing a deep-cut floor penetration. TAA compliance makes it a viable specification for federal facilities, government-funded projects, and any site where Trade Agreements Act sourcing is a procurement requirement.

Key Features

• On-Grade Installation Profile: The Grade Type is On Grade — meaning this unit sits flush with or slightly above the finished floor surface rather than recessed into a raised-access floor tile system. That matters on concrete slab or low-profile floor environments where a fully recessed box is not practical.
• Interior Depth of 16.13 in (41 cm): That 16-plus inches of usable depth gives you real routing room for patch cords, power leads, and conduit bends. Tight boxes force sharp cable bends that degrade Cat6A performance and create maintenance headaches; this depth avoids that.
• 12.75 in Width (32.4 cm): Wide enough to mount a multi-port keystone insert, duplex power module, or a combination plate side by side — without the cramped fitment common in narrower floor box formats.
• 6 in Height (15.2 cm): The 6-inch body height keeps the above-floor profile low enough for conference rooms and open office environments where trip-hazard and ADA clearance are design constraints.
• TAA Compliant: Verified TAA-compliant, so it meets the sourcing requirements for GSA Schedule procurements, DoD facilities, and state/local government bids that reference TAA. Specify this SKU with confidence on those projects — no sourcing exception needed.
• Middle Atlantic Evolution Series Platform: Part of the Middle Atlantic Evolution floor box family, which means lid covers, inserts, and finish plates designed for this series are dimensionally matched. You are not sourcing one-off hardware for every trim piece.

Integration & Compatibility

The EFB8S-OG is suited for structured cabling deployments in commercial buildings, government offices, control rooms, and conference centers where floor box infrastructure routes data, AV, or low-voltage power to workstations and AV endpoints. Coordinate with your low-voltage cable management plan early — the 16.13 in depth requires a corresponding floor or slab clearance below the finished surface. Conduit entry points and the number of connectivity modules should be confirmed against the Evolution Series insert catalog before rough-in. For projects requiring full AV infrastructure planning, a structured AV infrastructure guide can help scope the conduit and box quantities correctly across a multi-room deployment.

Frequently Asked Questions

Q: Is the EFB8S-OG TAA compliant for government procurement?

A: Yes. The EFB8S-OG is TAA-compliant, making it eligible for GSA Schedule and other federal or state procurements that require Trade Agreements Act sourcing.

Q: What does 'On Grade' mean for the EFB8S-OG?

A: On Grade means the box is designed to install at finished floor level on a solid substrate such as a concrete slab, as opposed to a raised-access floor tile system. It sits flush with or slightly above the finished floor surface.

Q: What are the dimensions of the EFB8S-OG?

A: Width 12.75 in (32.4 cm), Height 6 in (15.2 cm), Depth 16.13 in (41 cm).

Q: Can the EFB8S-OG be used in a raised-access floor environment?

A: The EFB8S-OG is specified as On Grade. For raised-access floor tile installations, verify with Middle Atlantic whether an alternate grade variant in the Evolution Series is the correct fit before specifying.

Q: Is the EFB8S-OG (sometimes searched as EFB8S OG) part of a modular insert system?

A: Yes. The EFB8S-OG is part of the Middle Atlantic Evolution Series floor box family, which uses a compatible ecosystem of inserts, lids, and finish plates designed to fit this box body.

Jerry Tildsen

The EFB8S-OG is the unit I specify when a project has concrete slab floors and the AV or data infrastructure needs a clean, code-compliant floor penetration without the complexity of a full raised-access floor system. That 16.13 in depth is the spec I check first — most competitor boxes in this class run 10–12 in, and anything under 14 in starts creating cable-bend problems the moment you add a right-angle patch cord and a conduit sweep in the same box.

Technical Highlights:

• 16.13 in Depth: Provides genuine routing clearance for 90-degree conduit entries plus Cat6A patch leads without exceeding the cable's minimum bend radius — a real issue in shallower boxes that gets discovered during commissioning, not design.
• On-Grade Configuration: Purpose-built for slab-on-grade installs where the floor box must interface directly with concrete or underlayment rather than a raised tile grid — eliminates the fitment improvisation that comes from forcing a raised-floor box into a slab application.
• TAA Compliance: Confirmed TAA-compliant on this SKU, which matters the moment a government end-user or GSA-schedule contract enters the picture — no sourcing exception paperwork, no substitution risk at close of project.

Deployment Considerations:

• Confirm slab clearance depth during design — 16.13 in of box depth requires adequate floor-to-structure clearance below finish grade; catch this in the structural drawings before rough-in, not after the slab is poured.
• Lid, insert, and cover plate compatibility should be verified against the Middle Atlantic Evolution Series accessory matrix for this specific body size before procurement — the 12.75 × 6 in opening does not accept all Evolution Series inserts interchangeably.

The EFB8S-OG is the right call for government office buildouts, federal courtroom AV installations, and any commercial project on a concrete slab where TAA sourcing is a hard bid requirement and cable-routing depth cannot be compromised.