Compression Strength Loss Over Time in Warehouse Storage
Corrugated boxes lose a significant portion of their original compression strength during prolonged storage, especially under load. Understanding the mechanics of compression creep and the environmental factors at play allows packaging engineers to design boxes that maintain structural integrity throughout their intended shelf life.
Why Compression Strength Declines
- Material Creep: Fibers gradually deform under constant load, reducing box stiffness.
- Humidity Impact: Elevated RH accelerates creep, with potential strength losses of 40–60% in humid conditions.
- Stacking Configuration: Poor pallet patterns or uneven weight distribution compound stress points.
Testing and Standards
- ASTM D4577: Measures compressive creep over time in shipping containers.
- ASTM D642: Evaluates initial compression strength, serving as a baseline before long-term storage.
Design Strategies to Reduce Loss
- Select Higher ECT Boards: Provides a stronger starting point, delaying the drop below critical load thresholds.
- Moisture Control: Use desiccants, ventilation, or moisture-barrier coatings in high-humidity warehouses.
- Pallet Pattern Optimization: Uniform stacking prevents concentrated stress on corner posts.
Application Considerations
- Long-term storage in non-climate-controlled facilities should factor in 30–50% compression loss for safety margins.
- Double-wall or reinforced designs are advised for seasonal inventory stored for extended periods.
References
ASTM International. (2015). ASTM D4577-15: Standard test method for compressive creep of shipping containers. ASTM International. https://www.astm.org/d4577-15.html
ASTM International. (2015). ASTM D642-15: Standard test method for determining compressive resistance of shipping containers. ASTM International. https://www.astm.org/d0642-15.html
Rising tariffs and trade restrictions on Chinese manufacturing are accelerating the need for U.S. companies to reevaluate their packaging supply chains. Many packaging buyers who once relied on Chinese corrugated,
POP display design must serve two masters — maximizing visual impact in-store while minimizing logistics costs. Engineering the right balance between display footprint, assembly complexity, and shipping volume is critical
Functional features like tear strips, windows, and hang tabs can enhance consumer experience and retail appeal—but they also introduce engineering challenges. Each modification affects structural strength, converting efficiency, and cost.
Phat Snax is redefining the snack aisle with a mission to make America’s snacks better for you — without killing the flavor. Their products, like the Devil’s Cake, are high
By submitting your information, you agree to our terms and conditions and privacy policy.
In the ever-evolving world of packaging, finding the perfect combination of features that ensures both security and ease of use can be a challenging endeavor.
Tampering and theft are significant concerns for manufacturers and consumers alike. Tampered products can pose health and safety risks, while theft results in financial losses.
When it comes to packaging solutions, corrugated boxes offer versatility and protection. Among the common corrugated box styles are the Regular Slotted Container (RSC) box