Middle Atlantic Multibay BGR Series Rack Without Rear Door 45 Rack Units (78-3/4IN. ) - BGR-4527LRD

Middle Atlantic BGR-4527LRD Open-Frame Floor-Standing 45RU Rack

Overview

The Middle Atlantic BGR-4527LRD is a 45-rack-unit, open-frame floor-standing rack built for integrators who need a high-capacity, seismic-rated enclosure without the airflow penalty of a rear-door design. At 27 inches deep with 24.4 inches of usable depth and a UL-verified 3,000 lb static load rating, it handles dense AV and security head-end buildouts — NVR stacks, managed switches, UPS units, and video management servers — without the structural compromises found in lighter-gauge alternatives. The BGR-4527LRD (often searched as BGR 4527LRD) ships as a frame-only configuration, giving you full flexibility to populate it with the access panels, blanks, and cable management that your specific deployment requires.

Key Features

• 45 Rack Units / 78.88 in Usable Height: Nearly 79 inches of usable panel space in a single frame — enough to house a multi-channel NVR, dedicated storage expansion, network switching, and power distribution without a second rack. Useful height matters more than nominal rack count; the BGR-4527LRD delivers on both.
• 3,000 lb UL-Listed Load Capacity: The UL listing isn't a marketing claim — it's a tested, third-party-verified rating. Dense security head-ends with multiple 2U UPS units and fully populated NVR chassis can easily exceed 1,000 lbs. At 3,000 lbs, this rack has substantial headroom even for the heaviest enterprise builds.
• Seismic Rating — OSHPD OPM-0444-13 (1,175 lb Seismic Load): Certified under HCAI (formerly OSHPD) seismic standards, which are among the most stringent in the US. If your installation is in California or any jurisdiction that mandates OSHPD/HCAI compliance — hospitals, government facilities, critical infrastructure — this certification (OPM-0444-13) satisfies that requirement directly. Seismic load capacity is rated at 1,175 lbs.
• 27 in Total Depth / 24.4 in Usable Depth: The 2.6-inch difference between total and usable depth accounts for the forward rackrail mounting position. Plan cable management and rear power strips against 24.4 inches of actual equipment clearance — not the nominal 27. Standard 1U and 2U appliances with rear cable exits typically need 18–22 inches, so you have margin.
• Open Rear (No Rear Door): Passive convection cooling without restriction. In high-density security head-ends where recorders and switches run continuously, removing the rear door reduces hotspot risk and eliminates door-swing clearance from your room layout. If you need a lockable rear, Middle Atlantic offers door kits as add-ons.
• Forward Rackrail Configuration: Equipment mounts to front rails only, which simplifies cabling runs and makes servicing rear-mounted ports accessible without partial disassembly. Pair with a rear-mounted vertical cable manager for clean, serviceable wiring.
• Gangable Design: The BGR-4527LRD is designed to gang side-by-side with other BGR-series frames. Multi-bay head-end rooms can align racks flush and bolt them together for a unified, stable structure — relevant for operations centers or large control rooms where four or more racks stand adjacent.
• Black Wrinkle Powder Coat Finish / Steel Construction: The wrinkle powder coat hides minor surface wear better than smooth finishes over the life of an installation. Steel construction at this gauge supports the 3,000 lb UL rating — this isn't a thin-wall import.
• TAA Compliant / USA Country of Origin: Federal Ops country of origin is the USA, and the product is TAA compliant — required for GSA Schedule purchases and many government/DoD contracts. Verify with your contracting officer whether TAA compliance alone satisfies your specific solicitation.
• 25mm × 150mm Swing Handles: Integrated swing handles simplify positioning during installation. On a rack this size (82.88 inches tall, 132 lbs shipping weight), that's not a trivial ergonomic detail.

Integration and Compatibility

The BGR-4527LRD accepts standard 19-inch EIA-310 rackmount equipment — the panel width is 19 inches per spec. It is forward compatible within the BGR series, meaning accessories and upgrade components released for the BGR platform will fit this frame without modification. The open rear accepts standard Middle Atlantic rear-door accessory kits if your project requirements change post-installation. The 23-inch overall width is typical for a 19-inch rackrail frame and fits standard floor cutouts and overhead cable management trays sized for this form factor. For security head-end deployments, this rack integrates directly with Middle Atlantic's power distribution, cable management, and ventilation accessory lines — all of which are sized for the BGR footprint.

Frequently Asked Questions

Q: Is the BGR-4527LRD seismic rated, and what certification does it carry?

A: Yes. The BGR-4527LRD is seismic rated under HCAI (formerly OSHPD) standards, with certification number OPM-0444-13. Its seismic load capacity is 1,175 lbs (533 kg). This certification is required for installations in California healthcare facilities and other HCAI-regulated environments.

Q: Does the BGR-4527LRD come with a rear door?

A: No. The LRD suffix in the model number designates this as the no-rear-door configuration. If you need a rear door, Middle Atlantic offers compatible door accessories for the BGR series, but they are not included with this SKU.

Q: What is the actual usable depth inside the BGR-4527LRD?

A: Usable depth is 24.4 inches (62 cm), compared to the 27-inch (68.6 cm) total frame depth. The difference accounts for the forward rackrail mounting position. Plan equipment selection and cable management against the 24.4-inch usable figure.

Q: Is the BGR-4527LRD TAA compliant?

A: Yes. The BGR-4527LRD is TAA compliant and has a Federal Ops country of origin of USA, making it eligible for GSA Schedule and most US government contract purchases. Confirm specific solicitation requirements with your contracting officer.

Q: Can multiple BGR-4527LRD racks be ganged together?

A: Yes. The BGR series is designed to be gangable — frames can be bolted side by side for multi-bay head-end installations. The rack is also forward compatible with current BGR accessories and future platform additions.

Q: What is the UL-listed load capacity of the BGR-4527LRD?

A: The UL-listed static load capacity is 3,000 lbs (1,360.8 kg). This is a third-party tested and verified rating, not a self-reported figure.

James Everett

The BGR-4527LRD is the rack I specify when a project has two non-negotiable requirements at the same time: OSHPD/HCAI seismic certification and a dense, 45RU head-end build. That OSHPD number — OPM-0444-13 — has to be on the submittal for California healthcare, and not every open-frame rack in this size class carries it. The 3,000 lb UL load rating gives you the structural confidence to fully populate it without load calculations becoming a project risk.

Technical Highlights:

• 3,000 lb UL Load Capacity: Third-party verified at 3,000 lbs — not a manufacturer self-report. Dense NVR/UPS/switch builds in large security head-ends can exceed 1,200 lbs loaded; this rack has room to grow without approaching its rated limit.
• OSHPD OPM-0444-13 Seismic Certification: 1,175 lb seismic load capacity under HCAI standards. If your submittal requires OSHPD documentation, this number goes directly on the schedule — no variance needed.
• 24.4 in Usable Depth: The spec sheet says 27 inches total; the number you design to is 24.4 inches. Most 1U/2U security appliances need 18–22 inches rear clearance including cable egress, so you have workable margin, but don't assume the full 27 inches when planning rear cable management.

Deployment Considerations:

• Frame-only configuration means you're sourcing blanks, cable management, and power distribution separately — budget and spec those early. Middle Atlantic's BGR accessory line is dimensioned for this frame, so compatibility isn't a concern, but lead time on accessories should be confirmed before installation day.
• At 132 lbs shipping weight and 82.88 inches tall, this rack requires two-person installation and verified floor load capacity, particularly in raised-floor data rooms or older construction. Confirm seismic anchor point locations against the OPM-0444-13 documentation before committing to a floor position.

This rack is the right call for California hospital security head-ends, government facility buildouts under TAA procurement requirements, and any operations center where seismic compliance is a hard permit requirement rather than a preference. If your project is neither seismic-zone regulated nor government-contracted, evaluate whether the full BGR spec is necessary or if a lighter-duty frame meets your actual load and compliance needs.