Data Center Racks: How To Make The Best Decision For Your Facility

As data centers accommodate more powerful equipment and higher rack densities, the demands placed on server racks continue to grow. Rack selection affects how equipment is installed and supported, as well as how efficiently the facility uses its available space.  

Choosing the right data center rack means looking at current equipment requirements while anticipating how those needs may change. Rack dimensions, structural capacity, and configuration all influence how well a facility can accommodate future upgrades or expansion. 

Choosing a rack capable of meeting requirements starts with understanding the design features with the greatest impact on performance and long-term usability.

How to Choose a Server Rack for Your Data Center

With so many options on the market, finding the best rack solution for your operation comes down to evaluating five key points:

• Server rack strength
• Off-site integration capabilities
• Usable space within the rack
• Cooling and thermal management
• Standard or custom

Understanding how each factor affects rack performance can help data center operators make a more informed purchasing decision. Read on for a closer look at each component and what to consider.

1. How Much Weight Should a Server Rack Support? 

As AI workloads and high-density computing place greater demands on data center infrastructure, server racks must be designed to accommodate increasingly complex equipment configurations. Depending on the application, racks may need to support substantial weight loads, making structural strength an important consideration.

Many commercial server racks are rated for static loads of up to 3,000 pounds, although capacities vary by manufacturer and configuration.

When comparing server racks, consider the combined weight of the equipment being installed and the rack’s rated load capacity. Static and dynamic load ratings are especially important when racks will be transported or moved with equipment already installed. Planning for future equipment upgrades can also help ensure your rack infrastructure continues to meet operational requirements.

When comparing server rack options, consider your weight load requirements for today, as well as what weight load requirements you’ll need to plan for in the future.

2. Can the Server Rack Support Off-Site Integration? To minimize disruptions associated with installing, configuring and integrating equipment into a data center environment, many organizations are turning to an off-site integration process known as “rack and stack.” Rack and stack is when system integrators deliver fully configured server racks to your data center site.

With rack and stack, servers and other equipment are installed and configured off-site, then shipped to the data center as a complete assembly. The rack-and-stack process can simplify on-site installation, but the rack must be strong enough to withstand transportation with the equipment in place. 

 A successful delivery relies on the structural integrity of the data center rack. Transportation introduces stressors different from those experienced by stationary racks. Movement during shipping can affect the frame, mounting points, and connections, especially when the rack is loaded with heavy equipment.

If you are considering off-site integration, or currently utilize it, confirm with your suppliers that their racks are rated for shipment when populated.Iit is mission-critical to ensure your server racks are rated for deployment when populated. 

When vetting suppliers, ask about their welding techniques. Some manufacturers save on labor and material by using “stitch” welding instead of a continuous seam. Stitch welding limits weight loads to about 2,000 pounds, much less than modern server racks demand. Racks made with stitch weldsare more likely to lose structural integrity and buckle in the shipping process when fully populated, causing untold damage to equipment, timelines, and budgets.

3. What Server Rack Size Do You Need? 

Data center racks have become taller, wider and deeper to accommodate increasing equipment densities. 

Rack height is measured in rack units (U), with each unit representing 1.75 inches of vertical equipment space. However, rack height alone provides an incomplete picture of usable space. Internal depth and width must accommodate the installed equipment while leaving sufficient room for cable routing and power distribution (PDU) units.

Common rack heights include::

• 42U
• 45U
• 48U

Larger configurations, including 52U racks, may also be appropriate for your installation. 

Most conventional server rack cabinets accommodate 19-inch rack-mounted equipment, although newer designs, including those following Open Rack standards, use different dimensions and mounting arrangements. Confirm compatibility with the specific equipment before selecting a rack. 

Cable management also deserves attention when evaluating rack dimensions. Cables need sufficient room for routing without restricting access to equipment or interfering with other components. Planning for cabling during rack selection can help make better use of the available space, particularly in facilities where floor space is limited. 

When evaluating server rack dimensions, look beyond the external measurements to determine how much of the cabinet will be used effectively.

4. How Does Rack Design Affect Data Center Cooling?

Cooling is a large expense for any data center, which makes cooling efficiency one of the most important considerations when selecting a data center rack. Cooling concerns are a priority  inf high-density data centers.

When choosing racks for your high-density data centers, ask about how the rack’s design works with hot-aisle/cold-aisle arrangements. Servers generally draw chilled air through the front and exhaust hot air out the back. Rack design and airflow accessories can help limit unwanted mixing between hot and cold air streams.

Airflow requirements vary by equipment and cooling system, so rack dimensions need to allow enough clearance for air to circulate appropriately. Cable routing and the placement of other components must be considered to prevent obstructions that could reduce cooling efficiency. 

AI and high-performance computing applications are pushing rack power densities higher, prompting some data centers to adopt direct-to-chip cooling and other advanced cooling technologies. Rack designs must account for the space and connections these systems require while allowing technicians appropriate access for maintenance. 

Maysteel addresses some of these evolving requirements through custom rack engineering, including designs for Open Rack (ORv3) infrastructure.

When choosing data center racks, evaluate compatibility with the facility’s cooling strategy and consider how thermal management requirements could change with future upgrades. 

H3: 5. Should You Choose Standard or Custom Server Racks?

The last consideration is whether a standard rack can accommodate the facility’s requirements or whether a custom design would be more appropriate. 

Generally, custom products do cost more than generic products due to economies of scale. However, when it comes to data center infrastructure products, a significant cost difference isn’t always the case – particularly when you’re looking at rack-and-ship solutions. Custom racks may also enable greater efficiencies in:

• Equipment accessCabling management
• Airflow 
• Operational expenses and cooling costs

Standard racks may be suitable for applications with conventional equipment configurations and installation requirements. A custom design may reduce the need for additional components or modifications during installation, which can offset initial manufacturing costs.

The following comparison highlights several considerations when evaluating standard and custom server racks.

Read more about the factors influencing custom vs. standard installation rack choices in our blog post, “Should We Switch to a Custom Data Center Rack?”

Key Takeaways

The right rack will provide the structural integrity, flexibility, and cooling support needed in a high-performance, high-density data center environment. Appropriate rack selection also enables offsite integration processes, arriving in installation-ready condition when shipped fully loaded with pre-configured, pre-integrated equipment.

DAMAC’s standard and custom racks have the strength and flexibility to support growing equipment weight loads within the data center and in transit, along with superior ease of use and airflow optimization. Maysteel’s rack solutions provide the features needed in today’s dynamic multi-vendor data center environments, delivering reduced operational costs, increased efficiency, and investment protection.

Are you responsible for data center infrastructure? Talk with our team today to get a quote!