Middle Atlantic 40SP/27D Multibay WRK - WRK-40-27

Middle Atlantic WRK-40-27 40RU Seismic-Rated Floor Standing Rack Enclosure

Overview

The Middle Atlantic WRK-40-27 is a 40-rack-unit, 27-inch-deep floor-standing enclosure built for demanding commercial and government AV/IT deployments where structural integrity, load tolerance, and seismic certification are non-negotiable. At 76.13 inches tall with a 25.75-inch usable depth and 10,000 lb static weight capacity, this is the rack you specify when the equipment list is long, the environment is harsh, or the facility requires seismic compliance under ASCE 7-10. Manufactured in the USA and TAA compliant, the WRK-40-27 (often searched as WRK 40 27) fits federal, state, and institutional procurement requirements straight out of the box.

For integrators building out surveillance systems or structured AV infrastructure in schools, courthouses, data centers, or broadcast facilities, this rack handles the physical demands of fully loaded equipment bays without the structural compromises common in lower-cost alternatives.

Key Features

• 40 Rack Units / 70-Inch Usable Height: 40RU of mounting space gives you room for a full NVR stack, patch panels, UPS units, and switching gear in a single enclosure — eliminating the need for a second rack in most mid-to-large deployments. The 70-inch usable height (177.8 cm) maximizes every unit of that vertical space.
• 10,000 lb Static Weight Capacity: The WRK-40-27 is rated for 10,000 lbs (4,535.9 kg) static load — a figure most integrators will never approach. What this means practically is zero concern about racking dense servers, battery backup systems, or stacked NVRs at full capacity. UL-listed load capacity is 2,500 lbs (1,134 kg), which covers any realistic fully loaded AV or security rack.
• Seismic Certification (ASCE 7-10 / UL Listed): The rack carries UL Listed seismic load capacity certification and meets ASCE 7-10 standards. For deployments in seismic zones — California, Pacific Northwest, parts of the Southeast — or facilities requiring IBC compliance, this certification is the difference between a spec that passes review and one that doesn't. Many projects that go through a structural engineer's sign-off require exactly this.
• 27.63-Inch Overall Depth / 25.75-Inch Usable Depth: At 25.75 inches of usable depth (65.4 cm), this rack accommodates deep server-class equipment, large NVR chassis, and full-depth UPS units without modification. Shallow racks force cable management compromises; this depth eliminates that constraint.
• 19-Inch EIA Panel Width / 10-32 Rail Threading: Standard 19-inch (48.3 cm) mounting rails with 10-32 threaded holes accept the full range of commercial rack-mount equipment — no cage nuts, no adapters for standard gear. This is the threading used across enterprise networking, AV, and security hardware.
• Rear Door Included: The integrated rear door provides physical access control and cable protection without requiring a separate purchase. For environments with multiple racks in close proximity, a rear door simplifies cable routing and protects rear-panel connections from incidental contact.
• Gangable Design: The WRK-40-27 is gangable, meaning multiple units can be joined side-by-side into a unified rack row. For large equipment rooms or NOC buildouts, this eliminates gaps between enclosures and allows for a clean, unified cable management run across the entire row.
• TAA Compliant / Made in USA: Federal Ops Country of Origin is the USA, and the unit carries TAA compliance — required for GSA Schedule purchases, federal integrations, and many state and municipal contracts. Specifying this rack on a government bid doesn't require a country-of-origin variance.
• 24.25-Inch Overall Width: At 24.25 inches (61.6 cm) wide, the footprint fits standard raised-floor tiles and typical equipment room column spacing. Plan floor penetrations and under-floor cable runs accordingly — this is not a compact form factor, and it shouldn't be.

Integration & Compatibility

The WRK-40-27 accepts any standard 19-inch rack-mount equipment using 10-32 threaded rails — servers, network video recorders, managed PoE switches, KVM units, patch panels, and power distribution units all install without modification. The gangable design integrates with other Middle Atlantic WRK-series enclosures for multi-bay room buildouts. For integrators planning large surveillance or AV infrastructure, pairing this rack with a structured rack accessory kit — blanks, cable managers, and power strips — is the standard approach to a clean, serviceable installation. Review your rack selection guide if you're evaluating depth and RU count against your equipment list before committing.

Frequently Asked Questions

Q: Is the Middle Atlantic WRK-40-27 TAA compliant?

A: Yes. The WRK-40-27 is TAA compliant and manufactured in the USA, making it eligible for GSA Schedule and federal procurement contracts.

Q: What is the seismic certification standard for the WRK-40-27?

A: The WRK-40-27 is UL Listed for seismic load capacity and certified to ASCE 7-10 standards, which is the standard referenced in the International Building Code for seismic design requirements.

Q: What is the maximum load capacity of the WRK-40-27?

A: The WRK-40-27 has a static weight capacity of 10,000 lbs (4,535.9 kg) and a UL-listed load capacity of 2,500 lbs (1,134 kg). In practice, the UL figure governs for certified installations.

Q: Can the WRK-40-27 be joined to other racks in a row configuration?

A: Yes. The WRK-40-27 is gangable, allowing multiple units to be bolted together side-by-side for unified multi-bay equipment room buildouts.

Q: What rail type does the WRK-40-27 use?

A: The WRK-40-27 uses standard 10-32 threaded rack rails at 19-inch panel width, compatible with the full range of enterprise AV, networking, and security rack-mount hardware.

Q: Does the WRK-40-27 come with a rear door?

A: Yes. A rear door is included with the WRK-40-27.

Jerry Tildsen

The spec that gets the WRK-40-27 onto government and institutional bids is the ASCE 7-10 seismic certification backed by UL Listed load capacity — and the TAA / USA-made status that clears federal procurement in one step. I've seen projects in California and the Pacific Northwest where the structural review required documented seismic compliance on every enclosure in the equipment room. This rack passes that review; a lot of alternatives don't.

Technical Highlights:

• 10,000 lb Static / 2,500 lb UL-Listed Capacity: The 2,500 lb UL figure is what gets stamped on the permit; the 10,000 lb static number tells you there's no practical load scenario in AV or security that approaches the structural limit of this enclosure.
• 40RU / 70-Inch Usable Height: For a fully loaded surveillance or AV head-end — NVR, UPS, managed switches, patch panels, and KVM — 40RU in a single enclosure is the right size. Splitting across two 20RU racks adds cost, cable runs, and a second footprint.
• 25.75-Inch Usable Depth: Deep enough for full-depth servers and enterprise-class UPS units. If your equipment list includes anything over 24 inches deep, check usable depth first — most budget enclosures cap at 24 inches and force you to leave the rear door off permanently.

Deployment Considerations:

• The overall width is 24.25 inches (61.6 cm) — plan floor tile cutouts and under-floor cable runs before delivery. This is a two-person installation; shipping weight is 157 lbs before any equipment is installed.
• Gangable means the rack can be bolted to adjacent WRK-series units, but confirm your room's floor loading rating before committing to a fully populated multi-bay row — a 10-rack row at full UL capacity adds up fast.

The WRK-40-27 belongs in equipment rooms where the specification sheet goes through an engineer's review — government facilities, university data centers, broadcast infrastructure, and any seismic-zone installation where the AHJ will ask for documentation. If your project doesn't require seismic cert or TAA, there are lighter and less expensive enclosures in the same family worth evaluating first.