Middle Atlantic 4IN Unwired PT Assembly SB - 4ATCSB

Middle Atlantic 4ATCSB 4AT Evolution Poke-Thru Unwired Assembly, Satin Brass Surface Cover

Overview

The Middle Atlantic 4ATCSB is an unwired poke-thru floor box assembly from the 4AT Evolution series, finished in satin brass with a surface-mount cover style. It ships with zero pre-installed outlets or duplex receptacles, giving integrators a clean starting point to populate the assembly with exactly the power, data, or AV modules required by the installation — no tearing out factory wiring that doesn't match your spec. The 4ATCSB is TAA compliant, making it a straightforward line item for GSA schedules, federal facilities, and government-funded projects where Buy American / Trade Agreements Act sourcing must be documented.

Poke-thru devices are the right call when a floor box or poke-thru solution needs to land flush in a finished floor — conference rooms, open office floors, training spaces — without surface raceways or ceiling drops. The 4AT Evolution platform from the Middle Atlantic product line is sized for 4-inch core-drill openings, which is the most common poke-thru diameter in commercial construction.

Key Features

• Unwired / Zero Outlets: The 4ATCSB ships with no pre-installed modules — outlet count is 0, duplex count is 0. That means you choose every insert: power, USB, HDMI, CAT6, or any combination the room requires. No rework, no wasted factory modules.
• Surface Cover Style, Satin Brass Finish: The surface-mount cover sits flush above the floor plane. Satin brass is a commercial-grade architectural finish that holds up in high-traffic spaces without the maintenance headaches of polished metal.
• TAA Compliant: Verified TAA-compliant at the SKU level — 4ATCSB can appear on federal, state, and municipal procurement orders without a waiver. If your project requires TAA documentation, this box checks it.
• 4AT Evolution Platform: Fits the 4AT series core-drill footprint. If your facility already has 4-inch poke-thru cores cut or other 4AT components in inventory, the 4ATCSB integrates without re-coring.
• Compact Ship Carton: Ships in a 21 × 8.25 × 8.25 inch carton (533.4 × 209.6 × 209.6 mm) — easy to stage on a cart and deliver floor-by-floor without freight damage risk on the cover assembly.

Integration & Compatibility

As an unwired assembly, the 4ATCSB is module-agnostic at the time of purchase. Populate it with AV connectivity modules or power inserts from the 4AT Evolution accessory ecosystem. Coordinate module selection with your electrical contractor early — the cover style and finish are fixed at order, but the functional load-out is determined at rough-in or fit-out. For projects mixing power and low-voltage data in the same floor core, verify local electrical code requirements for compartment separation before specifying inserts.

If you need a pre-wired alternative or a different finish, consider other variants in the poke-thru device category — Middle Atlantic offers the 4AT platform in multiple cover styles and factory-wired configurations.

Frequently Asked Questions

Q: Is the 4ATCSB TAA compliant for federal procurement?

A: Yes. The 4ATCSB is verified TAA compliant and can be specified on GSA schedules and government-funded projects without a waiver.

Q: How many outlets come pre-installed in the 4ATCSB?

A: None. The 4ATCSB ships completely unwired with zero outlets and zero duplex receptacles. You populate it with the modules your installation requires.

Q: What floor-core diameter does the 4ATCSB require?

A: The 4ATCSB is part of the 4AT Evolution series, designed for 4-inch poke-thru core-drill openings — the standard commercial poke-thru diameter.

Q: What finish and cover style does the 4ATCSB use?

A: Satin brass finish with a surface-mount cover style.

Q: Can the 4ATCSB be used on a federal or government project requiring TAA documentation?

A: Yes — TAA compliance is confirmed at the SKU level for the 4ATCSB, so it supports Buy American / Trade Agreements Act documentation requirements.

Jerry Tildsen

The 4ATCSB is the blank-slate version of Middle Atlantic's 4AT Evolution poke-thru line — zero pre-installed outlets, surface-mount cover in satin brass, and TAA-compliant out of the box. I reach for this SKU specifically on projects where the AV/power module mix isn't locked in at rough-in, or where a facilities team wants to standardize on one floor-box assembly across multiple room types and populate each one differently at fit-out.

Technical Highlights:

• Zero Factory Modules: With outlet count and duplex count both at 0, the 4ATCSB gives you a fully open bay — no cutting out pre-wired inserts that don't match the room's actual load-out spec.
• TAA Compliance: Confirmed at the SKU level, which matters when the project is federally funded or bid under a GSA schedule. Saves a compliance conversation late in the procurement cycle.
• Satin Brass Surface Cover: Surface-mount style means less floor-core depth required versus flush-to-subfloor designs — useful in raised-access floors with tighter plenum clearances.

Deployment Considerations:

• Order modules at the same time as the assembly — the 4ATCSB cover finish is fixed at order, and satin brass must coordinate with adjacent furniture and floor finishes in the design package.
• The ship carton is 21 × 8.25 × 8.25 inches; stage these on a dedicated cart when delivering to upper floors on active construction sites — the cover assembly is the finish component and scratches easily before installation.

Best fit for corporate conference room buildouts, government training facilities, and higher-ed collaborative spaces where TAA compliance is non-negotiable and the AV integrator needs maximum flexibility in module selection at fit-out.