Tripp Lite
Eaton Tripp Lite Series 42U Standard-Depth 4-Post Premium Open Frame Rack
Best open-frame rack for IT professionals needing accessible, high-capacity equipment storage.
The Eaton Tripp Lite Series 42U Premium Open Frame Rack (SR42UBEXPNDNR3) is an expansion model built to support up to 3000 lbs of standard 19-inch rack equipment across 42U of vertical space. Designed without doors or side panels, it offers easy access. The vertical rails feature square mounting holes adjustable from 4 to 37 inches deep in quarter-inch increments for precise placement. This SmartRack unit includes preinstalled 3-inch casters for easy positioning and levelers for final securing. It also supports tool-less 0U mounting for compatible PDUs and cable managers, making deployment efficient.
$1237.18
Owner Satisfaction
4.6
/ 5
Category Rank
145
/ 1638
#145 in Computer Racks & Mounts
Price vs Category Average
+118%
Above average
Rack Height
42
/ U
Who it's for
- Data center managers prioritizing passive cooling for high-density equipment
- System administrators housing heavy enterprise servers and power units
- IT technicians needing quick access for frequent hardware maintenance
Who should skip it
- Office designers requiring a clean, quiet, and aesthetically polished workspace
- Security-conscious teams operating in public or shared office spaces
- Facility managers overseeing environments prone to dust or contaminants
Performance breakdown
Structural Load Capacity
Handles heavy enterprise-grade hardware with a robust 3000-pound weight limit.
Mounting Versatility
Quarter-inch rail adjustments ensure a perfect fit for diverse equipment depths.
Deployment Efficiency
Tool-less 0U mounting streamlines the installation of PDUs and cable managers.
Accessibility
Open-frame design provides unrestricted access for rapid maintenance and cabling tasks.
Mobility
Preinstalled casters allow for easy positioning despite the heavy-duty steel frame.
Ecosystem Compatibility
Seamless integration with the extensive SmartRack accessory line simplifies custom configurations.
Key Specs
Rack Height
42U
Weight Capacity
3000 lb Dynamic/Rolling
Overall Depth
41.5 inches
Overall Height
78.5 inches
Overall Width
23.6 inches
Rack Width
19 inches
Product Color
Black
Warranty
5 Year
Features
- Ships as an open frame without doors or side panels
- Rails adjust in quarter-inch increments for depth
- Numbered rack spaces simplify equipment installation
- Supports tool-less 0U mounting for PDUs/managers
- Preinstalled casters allow minor positioning adjustments
- Grounding points connect to facility earth ground
- Part of the SmartRack family for accessory compatibility
What customers say
Customers overwhelmingly praise the Eaton Tripp Lite 42U Open Frame Rack for its robust construction and professional stability. IT professionals value the heavy-duty steel frame, which inspires confidence when mounting critical equipment. Assembly is generally straightforward, with reviewers appreciating the perfect alignment and clear U-marking system. The ample depth easily supports standard servers and advanced cable management. The open design is a major benefit, significantly improving airflow and accessibility for maintenance tasks. While the price is premium, users agree that the superior quality, reliability, and peace of mind provided by the Tripp Lite brand fully justify the investment, making it an excellent long-term asset for demanding environments.
Know before you buy
Yes, the vertical rails are adjustable from 4 to 37 inches deep. They feature quarter-inch increments, allowing you to precisely align the rails to fit your specific server or networking hardware.
No, this is an open-frame model designed specifically for environments where maximum airflow and easy access to equipment are prioritized. It does not include side panels or doors.
Yes, the rack is designed to support tool-less 0U mounting for compatible PDUs and cable management accessories, helping you keep your cabling organized without taking up valuable rack space.
This rack is rated for a dynamic, or rolling, weight capacity of 3,000 lbs. This makes it suitable for heavy-duty server deployments while still being mobile enough to position during installation.
Yes, the vertical rack spaces are numbered. This feature simplifies the installation process by helping you quickly identify and align your equipment at the correct height.
The rack comes with preinstalled 3-inch casters for easy movement and built-in levelers. Once you have positioned the rack, you can use the levelers to secure it firmly to the floor.
Still have a question?
Ask Hayley anything about this product before you decide.