Middle Atlantic Swinging Wallrack 40 Space Accommodates 26IN. Deep Equip ***Drop Ship - SR-40-28

Middle Atlantic SR-40-28 40U Large Pivoting Wall Rack

Overview

The Middle Atlantic SR-40-28 is a 40-rack-unit swinging wall rack engineered for installations where floor space is off the table but equipment depth and structural load are not. At 26 inches of usable depth and a UL-rated 500 lb load capacity, this is not a light-duty bracket shelf — it's a full-scale rack enclosure that happens to hinge away from the wall for rear access. If you're deploying NVRs, patch panels, UPS units, and managed switches in a telecom room, server closet, or equipment alcove where a freestanding rack won't fit, the SR-40-28 (often searched as SR 40 28) is the configuration to evaluate first.

Manufactured in the USA and TAA-compliant, the SR-40-28 qualifies for federal, state, and municipal projects with domestic-content or trade-agreement requirements — a procurement checkbox that eliminates a lot of alternatives at bid time.

Key Features

• 40 Rack Units / 70 in Usable Height: 40 RU of mounting space accommodates dense equipment stacks — think a 16- or 32-channel NVR, a PoE switch, patch panels, and a UPS in a single enclosure without overflow. The 70-inch usable height (177.8 cm) means you're not fighting for space at the top and bottom rails.
• 500 lb UL-Rated Load Capacity: The 500 lb UL load rating (226.8 kg) is a verified structural figure, not a marketing estimate — meaning it's been independently tested to that threshold. For mixed AV and security infrastructure with heavy UPS gear, this rating matters at the engineering-approval stage of a commercial project.
• 26 in Usable Depth: The 26-inch usable depth (66 cm) accommodates most 1U and 2U rack-mount equipment in the security and AV space, including deep UPS units and rackmount network video recorders. The overall enclosure depth is 28 inches (71.1 cm), so factor the extra 2 inches when measuring your wall-to-obstruction clearance.
• Pivoting / Swinging Design: The rack swings away from the wall, giving technicians clear rear access to cable management, power distribution, and card slots without dismounting equipment. For installations in tight mechanical rooms or behind doors, this is the feature that makes ongoing maintenance practical rather than painful.
• Seismic Rating — 335 lb Capacity: The SR-40-28 carries a seismic load rating of 335 lbs (152 kg) to CSA Standard — relevant for installations in seismic zones (California, Pacific Northwest, parts of the Southeast) where local code may require rated enclosures. If your AHJ requires seismic certification, confirm the applicable zone category against CSA test parameters before specifying.
• Forward Rackrail / Forward Compatible Design: The forward rackrail configuration and forward-compatible designation mean this rack is compatible with Middle Atlantic's modular accessory ecosystem — cable managers, shelves, power strips, and future rail upgrades without replacing the enclosure. That's a real budget consideration on multi-phase deployments where equipment evolves.
• TAA Compliant + UL Listed: Both TAA compliance and UL listing are confirmed for the SR-40-28. TAA opens the door to GSA schedule and government contract procurement. UL listing satisfies the structural and safety review requirements most commercial GCs and AHJs expect to see in permit packages.
• USA Manufactured: The SR-40-28 is manufactured in the United States (Federal Ops Country of Origin: USA). For projects with Buy American provisions or domestic-preference bid requirements, this is a verifiable, documentable fact — not a marketing claim.
• 23.5 in Width: At 23.5 inches wide (59.7 cm), the enclosure fits standard 19-inch rack equipment with proper rail spacing while staying within the dimensional envelope of most equipment room rough-ins. Verify rough opening width before rough-in framing on new construction.

Integration & Compatibility

The SR-40-28 is designed to integrate with Middle Atlantic's broader rack accessory line — including power distribution units, vertical and horizontal cable managers, and equipment shelves — thanks to the forward rackrail and forward-compatible architecture. Standard 19-inch rack-mount equipment from any manufacturer installs directly on the EIA-standard rails.

For security integrators deploying NVR-based surveillance systems, this rack accommodates the full infrastructure stack: NVR, PoE switch, UPS, and patch panel in a single wall-mounted enclosure. Pair it with a managed PoE switch and structured cabling to keep the installation clean and serviceable. The 26-inch usable depth handles virtually all standard 1U rack-mount security appliances without modification.

The shipping weight is 227 lbs (103 kg) — plan for a two-person installation minimum, and verify that the wall structure (stud spacing, blocking, substrate) is rated for the combined weight of the enclosure plus maximum equipment load before anchoring. For installations near the 500 lb UL limit, a structural engineer sign-off is advisable on commercial projects.

Frequently Asked Questions

Q: Is the Middle Atlantic SR-40-28 TAA compliant for government procurement?

A: Yes. The SR-40-28 is confirmed TAA compliant and manufactured in the USA, making it eligible for GSA schedule and government contract procurement requiring domestic or trade-agreement content.

Q: What is the maximum load capacity of the SR-40-28?

A: The SR-40-28 has a UL-rated load capacity of 500 lbs (226.8 kg). The seismic load capacity is rated separately at 335 lbs (152 kg) to CSA Standard.

Q: How much usable rack depth does the SR-40-28 provide?

A: The usable depth is 26 inches (66 cm). The overall enclosure depth is 28 inches (71.1 cm), so account for the additional 2 inches when planning wall clearance.

Q: Is the SR-40-28 seismic rated?

A: Yes. The SR-40-28 is seismic rated with a seismic load capacity of 335 lbs (152 kg) to CSA Standard. Verify the applicable seismic zone category against CSA test parameters with your AHJ before specifying for code-required seismic installations.

Q: Can the SR-40-28 accommodate standard 19-inch rack equipment?

A: Yes. The SR-40-28 uses a standard forward rackrail configuration compatible with EIA-standard 19-inch rack-mount equipment. It provides 40 rack units (70 inches) of usable mounting height.

Q: What are the installation weight considerations for the SR-40-28?

A: The enclosure ships at 227 lbs (103 kg) before equipment is loaded. Plan for a two-person installation minimum and verify that the wall structure is rated to support the combined weight of enclosure plus equipment load — up to 500 lbs UL-rated — before anchoring.

Eden Phillips

The SR-40-28 earns its place on my specification list specifically because of the 500 lb UL-rated load capacity paired with the pivoting design — that combination is harder to find than you'd expect at this rack unit count. When I'm planning a 40U wall-mount deployment with a full UPS, multi-channel NVR, and managed switching stack, I need to know the structural rating is independently verified, not estimated by the manufacturer. The SR-40-28 delivers that.

Technical Highlights:

• 500 lb UL Load / 335 lb Seismic: Two independently rated load figures matter on commercial bids — the 500 lb UL figure for standard structural review and the 335 lb CSA seismic figure for zone-compliant installations. Don't conflate them; they're tested under different conditions.
• 26 in Usable Depth: At 26 inches of usable depth, this rack handles deep 2U UPS units and full-depth NVRs without shimming or shelf extensions. The 2-inch delta between usable (26 in) and overall depth (28 in) is the wall bracket clearance — account for it in your rough-in measurements.
• Forward Rackrail Architecture: The forward-compatible rail system means you're not locked into a static accessory ecosystem. Cable managers, blanks, shelves, and PDUs from the Middle Atlantic line drop in without re-engineering the enclosure.

Deployment Considerations:

• At 227 lbs shipping weight, this enclosure requires a minimum two-person lift and a wall substrate — blocking, masonry, or structural steel — rated for combined enclosure-plus-equipment loads approaching 700+ lbs worst case. Get the structural sign-off before the rack goes up on a finished wall.
• The seismic rating of 335 lbs is lower than the standard UL load rating of 500 lbs — if you're in a seismic zone and loading this rack near capacity, you may exceed the seismic-rated threshold even while staying within the standard UL limit. Design to the more restrictive figure if seismic code applies.

This rack is the right call for equipment room buildouts in K-12, municipal, and healthcare facilities where TAA compliance is a bid requirement, wall space is constrained, and the equipment load includes heavy infrastructure like rackmount UPS and multi-drive NVR chassis — scenarios where a light-duty swing-arm bracket would fail structurally and a freestanding rack won't fit the floor plan.