Middle Atlantic 1GNG 1 1/4IN CON Hsng ASY - 1125CHA

Middle Atlantic 1125CHA Evolution Series 1-1/4 In. Conduit Bottom Housing Assembly

Overview

The Middle Atlantic 1125CHA is the conduit bottom housing assembly for the Evolution Series recessed poke-thru device lineup, designed to accommodate 1-1/4 in. conduit runs feeding up through the floor into a recessed floor box. If you're designing an AV or structured cabling infrastructure where floor-fed conduit meets a clean, recessed outlet point — this is the component that makes the underfloor-to-surface transition work. Its compact footprint (2.1 in. W × 2.3 in. H × 3.6 in. D) keeps the assembly tight within the floor deck, critical in environments where slab depth or subfloor clearance is constrained.

TAA compliance is confirmed for the 1125CHA, making it a straightforward procurement choice for federal projects, GSA schedules, and any government or education deployment where Trade Agreements Act conformance is a hard requirement rather than a checkbox afterthought.

The silver finish integrates cleanly with standard Evolution Series floor box hardware, maintaining a consistent aesthetic in corporate boardrooms, conference centers, and open-plan office floors where visible infrastructure needs to look intentional.

Key Features

• 1-1/4 In. Conduit Bottom Entry: Sized specifically for 1-1/4 in. conduit — the common trade size for structured cabling runs feeding low-voltage wiring (Cat6, AV signal, control) from below the floor slab. Using the correct conduit size at the housing prevents crush points and keeps pull tension manageable on long runs.
• Compact 3.6 In. Depth: At 3.6 in. (9.1 cm) deep, the 1125CHA fits into typical concrete slab or raised-floor cavities without requiring oversized cutouts or custom framing. Confirm your local slab thickness or plenum depth before specifying — poke-thru devices require adequate clearance beneath the box.
• 2.1 × 2.3 In. Footprint: The narrow 2.1 in. width and 2.3 in. height mean the housing assembly occupies minimal floor real estate, leaving room for adjacent conduit entries or other floor penetrations in dense infrastructure zones.
• TAA Compliant: Verified TAA compliance for the 1125CHA supports procurement under GSA MAS and similar government contract vehicles. No need for a waiver or country-of-origin audit on this component — it satisfies the Trade Agreements Act out of the box.
• Silver Finish: Matches the Evolution Series palette. In high-visibility floor installations (training rooms, executive suites, open offices), finish consistency between the housing assembly and the surface trim ring matters — mismatched hardware reads as a sloppy install.
• Evolution Series Integration: The 1125CHA is purpose-built for the Middle Atlantic Evolution Series poke-thru ecosystem. Mixing housing components across series or brands risks misalignment at the surface trim, gasket gaps, and non-compliant fire-stopping at the penetration — use matched components throughout the assembly.

Integration & Compatibility

The 1125CHA is designed as part of the Middle Atlantic Evolution Series recessed poke-thru device system. It functions as the conduit bottom housing assembly — the underfloor component that accepts the conduit stub-up and anchors the lower half of the floor box assembly. Coordinate with the matching surface trim, insert modules, and fire-stop collar components within the Evolution Series to complete a code-compliant floor penetration.

For projects requiring a complete AV and structured cabling infrastructure solution, confirm the full Evolution Series bill of materials with your floor box specification: surface trim ring, insert frames, and any required fire-rated collar accessories are separate line items. If you're sourcing cable management components for the same project, Middle Atlantic's broader catalog covers raceways and in-wall pathways that complement the poke-thru installation.

Verify local fire code requirements for poke-thru assemblies — UL-listed fire-stop collars are typically required at any conduit penetration through a rated floor assembly. The 1125CHA housing must be paired with appropriate fire-stop components; consult the Authority Having Jurisdiction (AHJ) for your specific slab rating.

Frequently Asked Questions

Q: Is the Middle Atlantic 1125CHA TAA compliant?

A: Yes. TAA compliance is confirmed for the 1125CHA, making it suitable for GSA schedule procurement and federal or government-funded projects where Trade Agreements Act conformance is required.

Q: What conduit size does the 1125CHA accommodate?

A: The 1125CHA is designed for 1-1/4 in. conduit bottom entry, which is a standard trade size for structured cabling and low-voltage wiring runs feeding through floor slabs.

Q: What are the dimensions of the 1125CHA housing assembly?

A: The 1125CHA measures 2.1 in. wide × 2.3 in. high × 3.6 in. deep (5.3 cm W × 5.8 cm H × 9.1 cm D).

Q: What finish does the 1125CHA come in?

A: The 1125CHA is finished in silver, consistent with the Middle Atlantic Evolution Series surface hardware palette.

Q: Does the 1125CHA include fire-stop components?

A: Fire-stop accessories are not confirmed as included with the 1125CHA housing assembly. Poke-thru penetrations through rated floor assemblies typically require separately specified UL-listed fire-stop collars — confirm requirements with your AHJ and the full Evolution Series component list.

Q: Is the 1125CHA compatible with all Middle Atlantic floor boxes?

A: The 1125CHA is purpose-built for the Middle Atlantic Evolution Series recessed poke-thru lineup. Compatibility with other Middle Atlantic floor box series is not confirmed in available evidence — specify components from within the same Evolution Series assembly for a matched, code-compliant installation.

Jerry Tildsen

The Middle Atlantic 1125CHA comes up on corporate build-outs and government fit-outs where the floor infrastructure spec is locked to TAA-compliant components — and that TAA confirmation on this housing assembly means it clears procurement without a separate country-of-origin review. At 3.6 in. deep with a 2.1 × 2.3 in. face, it's sized for real-world slab constraints, not a lab environment.

Technical Highlights:

• 1-1/4 In. Conduit Entry: Matches the most common trade size for structured cabling stub-ups — no reducing bushings, no field modifications needed when your electrician has run standard 1-1/4 in. EMT from the telecom room below.
• 3.6 In. Installed Depth: At 9.1 cm, this fits within typical 4 in. concrete slab poke-thru clearances, but confirm actual slab thickness on your drawings before ordering — tight-slab jobs (3.5 in. or under) need field verification.
• TAA Compliance: Confirmed on the 1125CHA — straightforward for GSA MAS, federal agency procurement, and DoD facility work where every component on the BOM needs a TAA check.

Deployment Considerations:

• The 1125CHA is the bottom housing only — budget for the matching Evolution Series surface trim, insert modules, and fire-stop collar as separate line items. Incomplete assemblies won't pass AHJ inspection at the penetration.
• Silver finish is fixed — if your project spec calls for a different surface color on the trim ring, verify the trim is available in your required finish separately; the housing assembly finish is not field-paintable in most install standards.

Best fit for corporate interiors, federal office fit-outs, and education facilities running structured cabling through rated floor assemblies where TAA compliance and a clean underfloor conduit transition are non-negotiable requirements.