4-Post 42U Mobile Open Frame Server Rack - Rolling 19in Network Rack

Our review of the 4-Post 42U Mobile Open Frame Server Rack finds it best for IT teams and small data centers that need a sturdy, ventilated, and configurable mounting solution. The single biggest reason to buy is its combination of heavy-duty construction and flexible mounting options: cold-rolled steel rails rated for a 1320lb stationary load, with adjustable depth and three installation modes that fit diverse equipment needs. Assembly is straightforward and the package includes the small hardware often missing from budget racks.

Key Features

• Adjustable depth: The four vertical rails slide between 22in and 40in, letting you fit deep servers, switches or AV gear without forcing compromises.
• 42U open frame design: The full 42U height provides ample mounting space while the open sides and rear support natural airflow for cooling.
• Heavy load capacity: Cold-rolled steel construction supports up to 1320lb stationary load, making it suitable for dense equipment stacks.
• Three install options: You can roll it on casters, stabilize it with leveling feet, or secure it to the floor with the included base plate for permanent installations.
• Hardware and markings included: Cage nuts, screws, clear unit markings and cable management hooks are provided to speed installation and organization.
• Compact shipping and instructions: The rack ships flat-packed and comes with easy-to-follow instructions plus an online assembly video to simplify setup.

Who It's For

This rack suits IT professionals, AV integrators and small to medium data centers that need a reliable 42U open frame solution with flexible depth to accept a variety of servers and network gear. It is particularly useful where cooling and accessibility matter because the open frame and sturdy rails allow easy cable access and airflow.

Those who need a fully enclosed, lockable cabinet or integrated power distribution should look elsewhere; this product is an open frame 4-post rack meant for accessibility and ventilation rather than physical security or dust sealing.

Pros & Cons

Pros

• Solid build quality from cold-rolled steel provides confidence when loading heavy equipment.
• Adjustable mounting depth accommodates a wide range of server and AV depths without guesswork.
• Multiple mounting options (casters, leveling feet, base plate) make it versatile for temporary or permanent installs.
• Includes cage nuts, screws and cable hooks so you can start mounting gear right away.

Cons

• Being an open frame rack, it does not offer physical enclosure or dust protection for sensitive environments.
• Assembly requires time and two people for heavier configurations despite clear instructions.

Specifications

Mounting Height	42U
Rail Width	19in
Adjustable Depth	22in to 40in (56cm to 101cm)
Height (with casters)	80.3in (204 cm)
Height (without casters)	78in (198 cm)
Weight Capacity (stationary)	1320lb (600kg)
Construction	Cold-rolled steel open frame

Our Verdict

The 4-Post 42U Mobile Open Frame Server Rack is a practical, value-oriented choice for professionals who need a robust, well-equipped open frame rack that supports a wide range of equipment depths. Its heavy-duty construction, included hardware and flexible mounting options make it a strong option for data rooms and AV racks where cooling and accessibility outweigh enclosure needs.

Frequently Asked Questions

Can the rack be moved after equipment is installed?
The rack can be fitted with casters for mobility, but heavy configurations should be moved cautiously and ideally with two people; for permanent installs, use leveling feet or the base plate.

Does it include mounting hardware?
Yes, the rack ships with cage nuts, screws, washers, cable management hooks and the basic tools required to assemble and mount equipment.

Will it fit deep servers?
Yes, the mounting depth adjusts from 22in to 40in (56cm to 101cm), accommodating most standard and deep rack-mount servers and AV units.