Middle Atlantic WMRK-4236 42U 36-Inch Deep Gangable Open Frame Server Rack
The Middle Atlantic WMRK-4236 is a 42-rack-unit, 36-inch deep open-frame floor-standing rack engineered for high-density server, AV, and security infrastructure deployments where structural integrity, seismic compliance, and long-term scalability matter. At 23.94 inches wide and 79.81 inches tall, this is a full-height, full-depth rack built for enterprise machine rooms, broadcast facilities, and secure operations centers — not a cut-rate closet cabinet. The frame-only configuration ships in black finish and is designed to gang side-by-side with additional WMRK units, making it the right foundation when you're planning a multi-rack row rather than a single-unit install.
Key Features
- 42 Rack Units / 73.5 in. Usable Height: 42U of usable space across 73.5 inches of interior height means you can fully populate a dense mix of 1U servers, 2U NVRs, patch panels, and power distribution units without worrying about running out of vertical real estate mid-project. Few deployments actually need more vertical space than this.
- 2,500 lb UL-Listed Load Capacity: The UL-listed static load rating of 2,500 lbs (1,134 kg) means you can load this rack with fully populated blade chassis, heavy UPS hardware, and dense storage arrays without engineering concern. The 2,500 lb figure is independently tested — not a marketing spec. That matters when your AHJ or insurance carrier asks for documentation.
- 10,000 lb Weight Capacity (Structural): The structural frame itself is rated to 10,000 lbs (4,535.9 kg), which reflects the rack's ability to serve as part of a ganged row that bears cumulative load. When multiple WMRK units are bolted together and anchored to the floor, the assembly load capacity scales accordingly — important for facilities engineers signing off on floor-loading calculations.
- Seismic Rating — ASCE 7-10 Compliant: The WMRK-4236 carries a UL seismic listing under ASCE 7-10 load standards. If your deployment is in a seismic zone — California data centers, Pacific Northwest facilities, or any site subject to seismic design requirements in the IBC — this is the compliance documentation your facilities team will need. Racks without seismic ratings are a permitting liability in those regions.
- 33.5 in. Usable Depth for Dense Equipment: With 36 inches of total depth and 33.5 inches of usable interior depth, you have enough room to mount front-to-back rails for deep 2-post equipment, cable managers, and rear PDUs simultaneously. If you're running servers with long-form factor (Dell PowerEdge, HP ProLiant), 33.5 inches of usable depth keeps you well clear of cable bind.
- Cage Nut Rail System: Standard cage nut rails on 19-inch EIA spacing ensure compatibility with virtually every rackmount device on the market — servers, switches, patch panels, security recorders, KVM drawers. No proprietary tooling, no adapter kits, no vendor lock-in. Swap components freely as infrastructure evolves.
- Gangable Frame Design: The WMRK-4236 (often searched as WMRK 4236) is engineered to bolt side-by-side with adjacent WMRK units into a continuous, structurally integrated row. For operations centers or data rooms requiring 4, 8, or 12 racks in line, gangable construction eliminates the gaps and alignment headaches of standalone cabinets and gives the row a unified structural profile.
- TAA Compliant, Made in USA: TAA compliance and US origin (Federal Ops Country of Origin: USA) satisfy federal procurement requirements under the Trade Agreements Act. If your project is government, defense, or federally funded infrastructure, these two attributes are non-negotiable checkboxes — and they're confirmed for this SKU.
- No Side Panels — Intended Configuration: This rack ships without side panels by design. In high-density multi-rack rows, side panels are typically omitted between ganged units and only installed on the outer ends of a row. Plan your side panel procurement accordingly — they're ordered separately for the end positions of your row.
Integration and Compatibility
The 19-inch panel width and cage nut rail system conform to EIA-310 standards, making the WMRK-4236 compatible with standard rackmount network switches, network video recorders, patch panels, and server chassis from any manufacturer. Middle Atlantic's Middle Atlantic rack and enclosure line includes complementary accessories — fan trays, PDUs, horizontal cable managers, and blanking panels — that integrate directly into the WMRK frame. For physical security and security server rack deployments, pair with a structured rack power distribution unit sized to your draw. The gangable design is specifically engineered to interlock with other WMRK units, so expansion planning is straightforward: add a unit, bolt the frames together, and extend your rail row.
Frequently Asked Questions
Q: Is the Middle Atlantic WMRK-4236 seismic rated, and what standard does it meet?
A: Yes. The WMRK-4236 carries a UL seismic listing based on ASCE 7-10 load standards. This is required documentation for installations in seismic design zones under the International Building Code.
Q: Is the WMRK-4236 TAA compliant?
A: Yes. The WMRK-4236 is TAA compliant and manufactured in the USA, satisfying Trade Agreements Act requirements for federal and government-funded procurement.
Q: What is the load capacity of the WMRK-4236?
A: The UL-listed static load capacity is 2,500 lbs (1,134 kg). The structural frame weight capacity is rated at 10,000 lbs (4,535.9 kg), which applies to the ganged assembly and floor-loading calculations.
Q: Does the WMRK-4236 include side panels?
A: No. The WMRK-4236 ships as a frame-only configuration without side panels. Side panels are ordered separately — this is standard practice for gangable rack rows where panels are only installed on the outer ends of the assembly.
Q: Can the WMRK-4236 be ganged with other racks in a row?
A: Yes. The WMRK is specifically designed to be gangable — multiple units bolt side-by-side into a structurally integrated row. This is the intended deployment model for multi-rack operations centers and data rooms.
Q: What rail type does the WMRK-4236 use, and is it compatible with standard rackmount equipment?
A: The WMRK-4236 uses standard cage nut rails on 19-inch EIA-310 spacing, compatible with virtually all standard 1U, 2U, and larger rackmount equipment from any manufacturer.
The spec that closes most conversations on the WMRK-4236 is the UL-listed 2,500 lb load rating combined with ASCE 7-10 seismic compliance — those two together are what facilities managers and structural engineers need to sign the permit in California, Oregon, Washington, and any other seismically active jurisdiction. Most integrators don't start thinking about seismic documentation until the AHJ asks for it on-site; the WMRK-4236 has that covered from day one.
Technical Highlights:
- 2,500 lb UL Load Capacity: Independently tested and listed — not a manufacturer estimate. Supports fully populated blade chassis, dense storage arrays, and heavy UPS hardware without a structural engineering waiver.
- 10,000 lb Frame Capacity: The 10,000 lb structural rating supports ganged-row floor-load calculations. For a six-rack row, your structural engineer works from this number, not the per-rack equipment weight.
- 33.5 in. Usable Depth: Deep enough to mount full-depth servers and rear-mounted PDUs simultaneously without cable bind — a real consideration when running Dell or HPE server chassis that push 28–30 inches on their own.
Deployment Considerations:
- This rack ships frame-only with no side panels — order end panels separately before the installation date or you'll be back-ordering on-site. For a four-rack row, you need exactly two end panels; the interior joins are left open.
- At 176 lbs shipping weight, plan for at least two-person delivery and a pallet jack rated for the floor surface. The WMRK-4236 is not a lift-gate-and-carry rack — coordinate dock access or freight elevator specs in advance.
The WMRK-4236 is the right rack for government-adjacent physical security control rooms, broadcast machine rooms, and enterprise data closets where the facility team will ask for UL listing paperwork and seismic compliance documentation before final sign-off. It's overspecified for a simple two-rack AV equipment room — but exactly right when TAA compliance, seismic certification, and long-term row expansion are all on the table simultaneously.
