When Do You Need Stamped Drawings for a Pallet Rack? The Simple Guide

If you’re asking whether your pallet rack project needs stamped drawings, the short answer is: you probably do—and in truth, you probably always should.

A stamped drawing isn’t just a piece of paper to satisfy the building department. It’s proof that a licensed engineer has personally designed, checked, and approved your rack system.

That stamp means accountability, safety, and compliance.

While local codes dictate when they’re legally required, making stamped drawings and calculations part of every project is simply good practice.

When Stamped Drawings Are Required for Pallet Racks

Most authorities having jurisdiction (AHJs) require stamped drawings any time a rack installation goes through the permitting process.

This typically includes taller systems, higher load capacities, or complex configurations. But the legal threshold shouldn’t be your only guide.

A stamped drawing ensures that a licensed engineer has put their name and license behind the design—verifying it meets structural codes, seismic requirements, and the RMI/ANSI MH16.1 standard.

In other words, even when the city doesn’t explicitly ask for them, stamped drawings are the surest way to know your rack system is designed for safety and longevity.

The Main Factors That Dictate Whether You Need Stamped Drawings

Building Height and Load Thresholds

Racks that exceed local height or load thresholds almost always trigger the need for permits—and therefore stamped drawings. Common triggers include systems over 5–6 feet tall or those storing commodities above 12 feet.

But beyond meeting code, a stamp guarantees your load ratings, beam capacities, and slab anchorage have been calculated and verified by a professional. That’s peace of mind worth having on any rack project.

Modified or Custom Racking Systems

If you’re installing a unique configuration, mixing rack types, or modifying used racking, you’re no longer working within the safe assumptions of a manufacturer’s standard design tables.

In these cases, stamped drawings are essential—and not just for compliance. They prove an engineer has evaluated your specific setup, accounted for nonstandard conditions, and ensured the design is structurally sound.

Without that stamp, you’re taking on risk without professional accountability.

Seismic and High‑Risk Areas

In seismic regions—or areas with high winds, heavy snow, or challenging soil conditions—engineered designs with stamps are virtually always mandatory.

A licensed engineer will confirm details like anchorage, baseplate sizing, and frame bracing to meet both local building codes and national standards.

These aren’t the kinds of variables you want guessed at; you want the confidence that a professional has checked every bolt, weld, and brace.

Permit vs. Non‑Permit Situations

Even if your project isn’t going through permitting, stamped drawings add significant value. Internal layouts stamped “Not for Construction” don’t carry the same responsibility as those sealed by a licensed engineer.

When a rack drawing is stamped, the engineer is officially putting their license on the line. That accountability means your system has been designed, not just drawn—and that’s always good practice.

Conclusion

Stamped drawings aren’t just about satisfying your city’s building department. They’re about knowing that a qualified, licensed engineer has designed and approved the system you’re trusting with your products, equipment, and people.

TL;DR: When Do You Need Them?

• Permitted projects: Always.
  
• Tall or heavily loaded racks: Always.
  
• Modified or custom layouts: Always.
  
• Seismic or high‑risk zones: Always.
  
• Standard catalog systems under thresholds: Recommended—because stamped drawings confirm the rack has been engineered for your exact use, not just “close enough.”
  

The Bottom Line

Stamped drawings and calculations mean a licensed engineer has accepted professional responsibility for your pallet rack system. That’s not just a box checked—it’s the gold standard for safety and compliance. Whether required by your AHJ or not, it’s the smart move every time.

Ready to take the guesswork out of your rack project? OneRack makes it easy to get stamped drawings and calculations from licensed rack engineers, tailored to your layout and local code requirements. Don’t wait for an inspector to flag your system—do it right from the start.