Pallet Rack Design: How to Create the Lightest, Most Efficient System That Meets Code

Good pallet rack design saves you money. Bad pallet rack design costs you steel, time, and failed inspections.

Whether you’re a rack manufacturer, integrator, or structural engineer, the goal is the same: build a system that’s safe, meets code, and doesn’t use more material than it needs to.

When it comes to pallet racking, lighter isn’t just better—it’s smarter. But “lighter” only works if the design still passes ANSI MH16.1, handles seismic loads, and clears your local building codes.

Whether you’re a rack manufacturer, integrator, or structural engineer, designing the lightest possible rack for your client’s capacity requirements means saving on material, freight, and installation costs.

But hitting that sweet spot—safe, code-compliant, and efficient—isn’t easy.

Historically, engineers had to rely on personal judgment and limited iteration to create racking systems.

But with modern tools like OneRack and its SmartSolve feature, the process of optimizing for the lightest possible design has changed completely.

The Problem: Most Pallet Rack Designs Are Heavier Than They Need to Be

Designing a pallet rack to meet capacity is one thing. Designing the lightest possible rack that still meets capacity, safety, and code requirements? That’s another level.

Engineers don’t always have the time or bandwidth to evaluate all of the possible configurations, which can be hundreds of thousands or even millions. That means most designs are over-engineered, leading to excess steel, unnecessary cost, and wasted freight.

Even small improvements can compound dramatically across thousands of bays.

Here’s why this is getting harder. ANSI MH16.1-2021 introduced an updated methodology that incorporates nine site-specific design factors into load capacity and stability-related calculations. The old method? It used one variable. That added complexity makes optimization more important than ever—and nearly impossible to do well by hand.

How to Create the Most Efficient Pallet Rack Design: Key Principles

1. Optimize the Material: Steel Grade, Shape, and Size

The first and most obvious lever is the material itself. This includes:

• Steel Grade: Higher-strength steel (e.g., 55 ksi vs 50 ksi) can handle more load with less material. Common grades you’ll see in the industry are A36, A572 Gr50, and A1011 HSLAS Gr55. Design calculations generally follow ANSI/AISI S100 (cold-formed steel) and ANSI/AISC 360 (hot-rolled steel), as applicable—except as modified or supplemented by ANSI MH16.1. So the grade you pick directly shapes your engineering math. For more on how material grade affects capacity, see our pallet racking weight capacity guide.
• Column & Beam Shape: Roll-formed shapes can vary significantly in performance based on flange width, lip depth, and corner radius. Structural (hot-rolled) steel is the go-to for heavy-duty or high-abuse environments like freezers and drive-in systems. Roll-formed sections cost less and work great for a standard selective rack.
• Member Sizing: Selecting the smallest member that meets capacity (with deflection limits) is the key to trimming unnecessary weight. The RMI standard caps beam deflection at L/180. That means a 96″ beam can bow no more than about half an inch (0.53″) under full load. Beams get checked for both strength and deflection. Whichever limit gets hit first controls the beam’s rating.

With SmartSolve in OneRack, every possible configuration is automatically evaluated to find the lightest section that satisfies structural requirements. Human engineers simply can’t match that volume of iteration in a real-world design timeline.

2. Column Reinforcement When Needed

Frame columns can be reinforced with backers—additional steel that increases axial and bending strength.

Considerations when adding backers:

• Add labor and weight
• Drastically adds capacity, which may be overkill. The frame is only a little bit overstressed
• Using a larger column or condensing panel spacing may be a more efficient option

A backer is basically another column welded onto the existing one. It works, but it adds manufacturing cost and freight weight. A smarter approach? Check whether tightening your panel spacing or stepping up one column gauge gets you the same result for less money. Finite Element Analysis (FEA) can show you exactly where reinforcement is needed—and where it’s not—so you don’t overbuild.

3. Optimize Panel (Brace) Spacing for Maximum Frame Efficiency

One of the most overlooked elements of frame design is panel spacing—the vertical distance between horizontal and diagonal braces in the frame.

Tighter panel spacing adds stability and increases effective column capacity. But it also adds steel and complexity. The trick is finding the optimal balance.

SmartSolve evaluates every possible spacing option in tandem with member size and reinforcement to determine the lightest, most structurally efficient frame geometry. Again, something that would take a human engineer like 10 years, OneRack solves in seconds.

But braces aren’t just about column stability. They also transfer seismic forces through the frame. In higher seismic zones, you may need to upsize your brace sections. And spacing becomes even more critical. Getting panel spacing right is one of the highest-leverage moves in pallet rack design. It can eliminate the need for expensive backers or column upgrades entirely.

4. Beam-to-Column Connections and Connector Stiffness

The connection between your beam and your upright column matters more than most people think. Connector stiffness affects both beam capacity and overall frame stability.

A simple example: a 4-pin teardrop connector is generally stiffer than a 3-pin. That extra stiffness can increase your beam’s capacity without adding any steel weight to the beam itself.

With MH16.1-2021’s move toward more direct analysis methods, connection properties (often modeled as semi-rigid where supported by test data/manufacturer properties) can meaningfully affect stability results compared to older simplified approaches. This means picking the right connector—not just the right beam and column—can meaningfully reduce the total steel in your system.

5. Base Plates, Anchors, and Slab Considerations

You can pick the biggest frames and beams on the market. But if your base plates and anchors can’t keep up, they’ll bottleneck the whole design.

Base plate capacity depends on the plate’s size, thickness, material grade, column dimensions, and anchor spacing. Your concrete slab matters too—its thickness and compressive strength factor in, especially in seismic zones where anchors have to resist uplift forces.

Per RMI guidance, rack columns are typically anchored, and the anchorage should be engineered as a system. Anchor quantity, layout, type, and orientation depend on overturning/uplift, shear, slab capacity, and seismic demands.. These parts have to be designed together—undersized anchors create a bottleneck just as fast as undersized columns.

Your pallet rack permit package will need full anchorage calculations. Getting this right early saves a lot of back-and-forth later.

Documenting Your Pallet Rack Design: LARC Drawings and Load Plaques

A finished pallet rack design isn’t just a set of calculations. It needs to be documented.

That’s where LARC drawings come in. LARC stands for Load Application and Rack Configuration. These drawings show your exact layout, beam elevations, load specs, and configuration details. You’ll need them for permit submissions, load plaque creation, and ongoing safety.

ANSI MH16.1 requires that rack systems display clear load capacity signage in conspicuous locations (often at aisle ends). The data on those signs comes straight from your LARC drawings. Any change to the rack—new beam heights, added levels, swapped parts—should trigger a LARC review. If the system is outside its rated capacity, it’s a safety risk.

Why Human Engineers Can’t Do This Alone

It’s not about skill—it’s about scale.

Given time, any good structural engineer could analyze 100,000 rack frame options and land on a solid, code-compliant solution. But engineers have the ability to:

• Analyze millions of configurations
• Compare total steel weight across frame types, steel grades, and backer choices
• Re-check results with updated loading, bracing, or anchorage scenarios

SmartSolve does this instantly, letting engineers focus on higher-level decisions, customer value, and project coordination.

Bringing Your Pallet Rack Design Together

If you want the lightest pallet rack design that still checks every box—capacity, stability, code compliance—there’s no better way than letting software do the heavy lifting.

SmartSolve, built into OneRack, considers all the critical variables:

• Member size and shape
• Steel grade
• Column backers
• Panel spacing

It instantly compares thousands of valid configurations to deliver the lightest, most efficient rack possible for your load.

Want to stop overbuilding your racks?

Register for a free trial of OneRack and see how SmartSolve transforms the way you design for efficiency.