Middle Atlantic
Middle Atlantic ERK-4420 44U Server Rack Cabinet
A fully welded, seismically certified 44U rack that holds 2500 lbs of mission-critical equipment with adjustable rails and a keylocked rear door.
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Overview
Reliable Equipment Housing with the Middle Atlantic ERK-4420 Rack
The Middle Atlantic ERK-4420 is a robust standalone rack designed to securely house your valuable equipment. With 44 rack spaces and a fully welded construction, this rack offers exceptional durability and stability. Its versatile design includes adjustable front rackrail, large cable entry, and a keylocked rear door for added security.
Specifications:
- Rack Spaces: 44U
- Construction: Fully Welded
- Rackrail: 1 Pair Fully-Adjustable Front Rackrail
- Cable Entry: Large Cable Entry in Bottom
- Top: Configurable Open Top
- Rear Door: Keylocked Solid Rear Door
- Grounding: Grounding and Bonding Stud Installed in Base
- Weight Capacity: 2500 Pounds
- Mounting Type: 10-32 Threaded
Key Features
Fully welded construction, solid sides
Fully welded construction, solid sides
UL Listed in the US and Canada
Seismic certified
1/2", 3/4", 1" and 1-1/2" electrical knockouts found on removable split rear plates, top knockout plate additionally includes UHF/VHF antenna knockouts
Pros & Cons
👍 Pros
- Fully welded steel construction eliminates racking flex under the full 2500 lb rated load, giving high-density server deployments a stable, vibration-resistant foundation.
- Seismic certification makes this rack compliant for data center and broadcast facility installations where structural codes require certified enclosures.
- Removable split rear plates with multiple knockout sizes (1/2" through 1-1/2") allow clean, code-compliant cable routing without field cutting.
- Keylocked solid rear door provides physical security for sensitive hardware without requiring a separate locking mechanism or accessory.
- UL Listed in both the US and Canada, reducing procurement friction for enterprise and government installations that require listed equipment.
👎 Cons
- Ships with only one pair of front rackrails — rear rail support for deep or heavy servers requires purchasing additional rail kits separately, adding cost and lead time.
- Solid rear door eliminates passive rear exhaust airflow, requiring deliberate active cooling design; in high-density configurations this becomes a thermal management challenge.
- The open top configuration is configurable but not sealed by default, meaning cable management above the enclosure requires a separately sourced top panel or brush strip.
- At 44U, the cabinet's physical footprint and weight make repositioning after initial placement a two-person job — site planning must be finalized before installation.
- No integrated cable management arm or vertical cable managers are included; power distribution and cable routing accessories are all additional purchases.
Frequently Asked Questions
What is the actual usable rack space in the ERK-4420?
The ERK-4420 provides 44U of rack space. Each rack unit equals 1.75 inches of vertical mounting height, giving you roughly 77 inches of total usable rail space — enough to house a full server stack alongside patch panels, KVM switches, and PDUs without running out of room.
Are the rack rails adjustable to accommodate different equipment depths?
Yes. The ERK-4420 ships with a single pair of fully adjustable front rackrails, which means you can position them fore-and-aft to accommodate shallow networking gear and deep 1U servers within the same enclosure. Rear-mounting support depends on your specific equipment and any optional rail kits.
What cable management options does the ERK-4420 provide?
The cabinet features a large cable entry in the bottom, and the removable split rear plates include 1/2", 3/4", 1", and 1-1/2" electrical knockouts. The top knockout plate adds UHF/VHF antenna knockouts — useful in AV and broadcast environments where RF cabling needs to exit the enclosure cleanly.
Is the ERK-4420 rated for environments where seismic activity is a concern?
Yes. The ERK-4420 carries seismic certification, which matters for facilities in earthquake-prone regions or for installations that must meet building code or insurance requirements. The fully welded construction — rather than bolted assembly — is what enables this rating and contributes to the overall rigidity.
How is the rear door secured, and does it allow ventilation?
The rear door is a solid, keylocked design — meaning physical security is built in without requiring an add-on lock. The trade-off is that a solid rear door provides no passive airflow path, so thermal planning (active cooling, blanking panels, airflow direction) is essential for dense deployments.
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