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Middle Atlantic

Middle Atlantic RIB-5-MRK-31 Riser Base for VMRK Racks

Five-bay welded steel riser base that doubles as a cable chase for Middle Atlantic VMRK 31" D rack systems.

$1,641.59*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Middle Atlantic RIB-5-MRK-31 is a purpose-built riser base designed to sit beneath five-bay VMRK Series rack configurations with a 31-inch depth. Constructed from 1/8-inch thick fully welded steel, it delivers a rock-solid foundation that keeps your rack system stable and level. The durable black powder coat finish provides corrosion and scratch resistance while maintaining a professional appearance that blends seamlessly with standard rack hardware.

Beyond structural support, the RIB-5-MRK-31 serves a practical secondary role as a lower cable chase. The open design beneath the rack allows installers to route power and data cables cleanly underneath the system, reducing visible cable clutter and improving airflow. Standing just 2.5 inches tall and weighing 16 pounds, it adds minimal bulk while providing meaningful clearance for cable management in server rooms, AV installations, and broadcast environments.

Specifications

Model
RIB-5-MRK-31
Compatibility
VMRK Series 31" D Racks
Number of Bays
5
Construction
1/8" Thick Fully Welded Steel
Finish
Black Powder Coat
Height
2.5 Inches
Weight
16 Pounds
Additional Function
Lower Cable Chase

Pros & Cons

👍 Pros

  • Fully welded 1/8-inch steel construction provides a rigid, stable foundation for multi-bay setups.
  • Doubles as a lower cable chase, reducing clutter and simplifying cable management.
  • Black powder coat finish resists scratches and matches standard rack aesthetics.
  • Five-bay width accommodates larger installations without needing multiple separate bases.
  • Low 2.5-inch profile adds minimal height while still providing clearance for cable routing.

👎 Cons

  • Only compatible with VMRK Series 31-inch depth racks, limiting use with other Middle Atlantic lines.
  • At 16 pounds, it adds noticeable weight to the overall installation footprint.
  • Does not include any integrated cable management hardware such as rings or clips.
  • The fixed five-bay width cannot be reduced for smaller installations.

Frequently Asked Questions

It is designed specifically for Middle Atlantic VMRK Series racks with a 31-inch depth.
Yes, the open riser design allows it to function as a lower cable chase, keeping cables organized beneath your rack system.
It supports a five-bay configuration, making it suitable for multi-bay rack installations.
It is built from 1/8-inch thick fully welded steel with a durable black powder coat finish.
It adds 2.5 inches of height beneath your rack system.

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