Middle Atlantic RL Series Relay Rack (84IN. Height) Black Finish - RL12-45

Middle Atlantic RL12-45 45U Open Frame Steel Relay Rack

Overview

The Middle Atlantic RL12-45 is a 45U, 84-inch open-frame steel relay rack designed for structured AV and security equipment installations where airflow, cable access, and fast deployment matter more than enclosed cabinet aesthetics. At 45 rack units of usable space on a 12-24 threaded rail pattern, this is a workhorse format common in server rooms, IDF closets, surveillance head-end builds, and AV equipment rooms. TAA-compliant and manufactured in the USA, the RL12-45 is procurement-safe for government and public-sector projects where domestic origin is a contract requirement. Explore the full Middle Atlantic rack and enclosure lineup if you need enclosed cabinet alternatives or modular wall-mount solutions.

Key Features

• 45 Rack Units (78.75 in usable height): With 78.75 inches of usable vertical space inside an 84.62-inch overall frame, you have room to fill an entire head-end's worth of NVRs, patch panels, UPS units, and distribution amplifiers in a single rack — no splitting across multiple frames to handle a mid-size surveillance deployment.
• 400 lb UL-Listed Load Capacity: The UL-certified 400 lb load rating means you can confidently specify this rack for dense NVR/server builds without worrying about structural compliance. UL listing on the load spec matters when the installation has to satisfy a facilities inspection or data center floor load sign-off.
• 1,600 lb Weight Capacity: The frame itself is rated to 1,600 lbs — four times the UL dynamic load figure. That headroom exists because relay racks take static loads too: bundled cabling, bolt-down hardware, and structural forces from seismic anchoring. If your installation requires seismic bracing, the structural margin is there.
• 12-24 Threaded Rail Pattern: The industry-standard 12-24 thread accepts virtually any rack-mount hardware — equipment ears, cage nuts are not required. If you're populating this rack from multiple vendors (NVR, network switch, KVM, power strip), 12-24 threaded rails mean you won't hit compatibility dead ends mid-install. Check your network switches and NVR rack ears — most commercial gear ships with 12-24 as the default fastener spec.
• 15.25-inch Depth, 3-inch Usable Depth at Rail: The 3-inch usable depth behind the rail face is tight by modern 1U server standards, but this is an open-frame relay rack — equipment overhangs the rail freely. The 15.25-inch overall footprint is intentionally shallow for installations where floor space is constrained, such as IT closets or wall-adjacent head-end rooms. Deeper equipment simply extends behind the frame without a door or side panel to obstruct it.
• 19.62-inch Width (Standard 19-inch EIA Form Factor): The 19.62-inch overall width accommodates standard 19-inch rack-mount equipment with room for the frame uprights. No special adapters needed for industry-standard 1U through 4U gear.
• TAA Compliant, USA Manufactured: Federal Ops country of origin is the USA, and the RL12-45 carries TAA compliance — a hard requirement for GSA schedule purchases, DOD projects, and most state/local government bids. If your procurement team needs a TAA rack that won't flag a compliance review, this meets it without requiring a waiver. See how it fits into broader rack and enclosure infrastructure planning.
• Open-Frame Design for Thermal and Cable Management: Unlike enclosed cabinets, the open frame provides unrestricted airflow on all sides — an advantage in head-end rooms without precision cooling. Cable runs reach equipment from any angle without routing through a rear door, which speeds up initial builds and simplifies moves/adds/changes later. For guidance on how to structure a rack deployment, the PoE switch and network infrastructure selection guides address cabling density planning.

Integration & Compatibility

The RL12-45 integrates directly into any standard 19-inch rack ecosystem. The 12-24 threaded rail accepts rack-mount ears from NVRs, managed switches, patch panels, KVM drawers, and 1U power distribution units without additional hardware conversion. The open-frame format pairs well with top-mount or side-mount cable management accessories from the same Middle Atlantic product family. For surveillance-specific builds, pair this rack with a purpose-matched network video recorder and a structured cabling plan sized to the channel count — a 45U frame can realistically house a full enterprise-scale NVR stack, redundant network infrastructure, and a UPS in a single floor-standing unit.

The RL12-45 (often searched as RL12 45) is also well suited to IDF and MDF buildouts in commercial construction where the general contractor specifies an open-frame pathway rack and the low-voltage team fills it with AV and security gear post-occupancy.

Frequently Asked Questions

Q: Is the Middle Atlantic RL12-45 TAA compliant?

A: Yes. The RL12-45 is TAA compliant and manufactured in the USA, making it eligible for GSA schedule purchases and most federal, state, and local government procurement contracts requiring domestic-origin equipment.

Q: What is the load rating on the RL12-45?

A: The RL12-45 carries a UL-listed dynamic load rating of 400 lbs (181.4 kg). The frame's total weight capacity is 1,600 lbs (725.7 kg), which accounts for static loading from cabling, anchors, and structural forces.

Q: What thread type does the RL12-45 use — cage nuts or threaded rails?

A: The RL12-45 uses 12-24 threaded rails. Cage nuts are not required; standard 12-24 rack screws seat directly into the rail. This is the most common thread pattern in commercial rack hardware, so compatibility with third-party equipment is essentially universal.

Q: How many rack units does the RL12-45 hold?

A: The RL12-45 provides 45 rack units of mounting space, with 78.75 inches (200 cm) of usable height inside an 84.62-inch overall frame height.

Q: What is the overall depth and footprint of the RL12-45?

A: The RL12-45 is 15.25 inches deep and 19.62 inches wide. The usable rail depth is 3 inches — this is an open-frame design, so equipment overhangs freely and is not constrained by the frame depth.

Q: Can the RL12-45 be used in government or public-sector installations?

A: Yes. The RL12-45 is both TAA compliant and UL Listed, with country of origin documented as the USA. It satisfies the compliance requirements common to federal, DOD, and public-sector low-voltage infrastructure bids.

Karl Wilson

The RL12-45 is the rack I spec when a surveillance or AV head-end needs maximum population density in a minimal floor footprint — 45U on a 15.25-inch-deep open frame is about as efficient as a floor-standing rack gets before you start compromising on load capacity or structural compliance. The UL-listed 400 lb dynamic load rating on this unit is what actually matters for inspection sign-off, not the 1,600 lb frame capacity figure that looks impressive on paper.

Technical Highlights:

• UL-Listed 400 lb Load Capacity: The UL listing on the dynamic load rating is the spec that matters for AHJ inspections and facilities sign-off — not a self-reported number. For dense NVR or server builds, confirm your populated weight stays under 400 lbs loaded.
• 12-24 Threaded Rails: No cage nuts, no rail adapters. Every major NVR, switch, and 1U PDU ships with 12-24 rack ears as the default. This eliminates a common field headache when populating racks from mixed vendors in a single head-end build.
• TAA Compliance + USA Origin: Federal Ops country of origin is documented as the USA, and TAA compliance is verified. For government project bids requiring Buy American Act or TAA language in the rack spec, the RL12-45 satisfies it without a waiver request.

Deployment Considerations:

• The 3-inch usable depth at the rail is intentional for this format — equipment overhangs freely on an open frame, so deep 2U NVRs and 1U switches mount without issue. But if your spec calls for contained cable management with a rear door, this is not the right product class; move to an enclosed four-post cabinet instead.
• At 84.62 inches tall, confirm ceiling clearance and door width before delivery. Standard commercial IDF door openings can be tight for a fully assembled 45U frame — some integrators stage assembly in-room after moving the frame through the door disassembled or on its side.

For a commercial surveillance head-end — say, a 64-channel enterprise NVR stack with redundant PoE switch infrastructure and a rack-mount UPS — the RL12-45 is the correct call: 45U of open-frame, UL-certified, TAA-compliant space that satisfies both the integrator's build-speed requirements and the facility's compliance documentation needs.