Middle Atlantic 12SP(21)RACK 18DEEP Maple - MBRK12

Middle Atlantic MBRK12 12U Maple Laminate Knockdown Open Rack

Overview

The Middle Atlantic MBRK12 is a 12-rack-unit open wood rack built for AV control rooms, boardrooms, and security operations centers where a finished furniture aesthetic matters as much as equipment access. The knockdown construction ships flat and assembles on-site — useful when the equipment room is on the 14th floor and elevator clearance is tight. At 200 lbs rated weight capacity across 21 inches of usable height, it handles a full complement of NVRs, managed switches, and patch panels without flex or racking issues.

The maple laminate finish makes the MBRK12 a natural fit for installations where the rack stays visible — reception desks, executive boardrooms, courtroom AV setups, or open-office technology hubs where a metal relay rack would look out of place. This is a purpose-built enclosure for integrators who need rackmount functionality with furniture-grade presentation.

Key Features

• 12 RU / 21 in usable height: Fits a typical small-system stack — a 4K NVR, a managed PoE switch, a patch panel, and a power conditioner — without crowding. The 21 in usable rack height is the working space after accounting for rail hardware, giving you accurate U-count for equipment planning.
• 200 lb weight capacity: Handles a fully loaded security or AV stack. A 1U managed switch, 2U NVR with drives, 1U UPS, and cable management still leave headroom at this rating — no need to triage what goes in.
• 17 in / 17.41 in usable depth: The 17.41 in usable depth accommodates most 1U and 2U rack equipment with room to route cabling behind. Deeper 2-post gear or short-depth switches fit cleanly. Note: deep 4-post equipment exceeding roughly 16 in of chassis depth will be tight — verify equipment depth before specifying.
• 10-32 threaded rack rails: Standard 10-32 tapped rails mean you can source rack screws and cage nuts from any AV supply chain. No proprietary hardware, no specialty fasteners. Every rackmount NVR, switch, and panel in your kit will mount without adapters.
• Knockdown construction: Ships flat, assembles at the install site. This is the right call when freight access is limited, the rack is going into a finished space, or you're shipping multiple units to a job site and want to minimize crate volume.
• Maple laminate finish, wood construction: The wood frame with maple laminate face delivers a furniture-grade appearance that blends into corporate interiors, hospitality environments, and courtroom installations. This is not a metal equipment cabinet — it is designed to be seen, not hidden.
• Overall dimensions 20.7 W × 22.63 H × 17 D in: Compact enough to fit in a closet-converted equipment alcove or under a reception desk extension, while still providing full 12U rack space. Width of 20.7 in is wider than a standard 19-in rack opening to accommodate the wood side panels.

Integration & Compatibility

The MBRK12 uses industry-standard 10-32 threaded rails on a standard 19-inch EIA rack pattern, so any network video recorder, managed PoE switch, patch panel, or 1U power conditioner that mounts to a standard rack will install without modification. The 17.41 in usable depth covers the vast majority of 1U–2U commercial security and AV equipment. For deeper chassis — some UPS units and high-density patch systems exceed 18 in — confirm equipment depth against the usable depth spec before specifying this rack.

This rack is part of the broader Middle Atlantic rack and enclosure line, which includes matching wood rack accessories, side panels, and furniture-style enclosures. If you are building a multi-rack installation, Middle Atlantic offers coordinated enclosure families that maintain the maple aesthetic across larger deployments.

For integrators specifying the full system: pair this rack with short-depth managed switches and compact 1U NVRs for the cleanest result. If your NVR requires deeper mounting or you are running dense cable management, review the rack enclosure category for enclosed alternatives with rear cable access panels.

Frequently Asked Questions

Q: What is the usable rack height of the MBRK12?

A: The MBRK12 provides 21 inches (53.3 cm) of usable rack height, which equals 12 rack units (12 RU) of mounting space.

Q: What is the maximum weight the MBRK12 can support?

A: The MBRK12 is rated for a 200 lb (90.7 kg) weight capacity, sufficient for a fully loaded small-to-mid-size security or AV equipment stack.

Q: What rail thread type does the MBRK12 use?

A: The MBRK12 uses standard 10-32 threaded rack rails, compatible with industry-standard rack screws available from any AV or network supply source.

Q: Does the MBRK12 ship fully assembled or as a flat-pack?

A: The MBRK12 is a knockdown rack — it ships disassembled and is assembled on-site. This is useful for freight-restricted access or installations in finished interior spaces.

Q: What is the usable depth of the MBRK12?

A: The usable depth is 17.41 inches (44.2 cm). Equipment with chassis depth up to approximately 16 inches will fit with room for rear cable routing. Verify deep-chassis equipment (large UPS units, some servers) against this spec before ordering.

Q: Is the MBRK12 suitable for outdoor or industrial environments?

A: No. The MBRK12 is a wood-construction open rack intended for finished interior environments — boardrooms, offices, control rooms, and hospitality installations. It is not rated for outdoor, high-humidity, or industrial use.

Eden Phillips

The MBRK12 comes up most often in proposals where the rack lives in a visible space — reception areas, boardroom AV closets, courtroom technology alcoves — and a standard steel relay rack would be flagged by the interior designer before installation day. The 200 lb capacity and 12 RU of usable space are real working numbers: I've seen this unit hold a 2U NVR, a 24-port managed PoE switch, a 1U patch panel, and a power conditioner without issue. The knockdown format is a genuine logistics benefit on jobs where freight elevator dimensions or doorway clearances make pre-built rack shipping impractical.

Technical Highlights:

• 17.41 in usable depth: Covers most 1U–2U commercial NVRs and managed switches. Short-depth switches (10–12 in) have plenty of room for rear cable dressing; anything over 16 in chassis depth needs a depth check before the PO goes out.
• 10-32 threaded rails: Standard thread means you're not hunting for proprietary hardware mid-install. Every integrator's truck stock of rack screws works here, which matters on a job with 40 units to mount in a day.
• 200 lb / 12 RU ratio: At roughly 16.7 lbs per RU of rated capacity, the wood frame handles a realistically dense equipment stack. The weight ceiling is not the constraint on a typical 12U security rack build — equipment selection is.

Deployment Considerations:

• Wood construction means this rack is strictly for climate-controlled interiors. Do not specify it for server rooms with condensation risk, basements with humidity variation, or any space without consistent HVAC.
• The overall width of 20.7 in is about 1.7 in wider than a standard 19-in rack footprint — account for this in alcove or closet installations where side clearance is tight.

The MBRK12 is the right call for corporate boardroom or hospitality AV deployments where the integrator needs a rackmount solution that passes a facility manager's aesthetics review without sacrificing standard equipment compatibility.