Why Are My Pallet Loads Shifting During Transit? Article

Understanding What Happens During Transit

A pallet load may appear stable while sitting motionless in a warehouse, but transportation introduces forces that challenge load integrity.

During transit, loads are subjected to:

• Sudden braking
• Rapid acceleration
• Cornering forces
• Road vibration
• Uneven road surfaces
• Repeated loading and unloading

Every movement creates stress on the load. If products are not adequately secured, cartons can begin moving independently, causing the entire load to become unstable.

The goal of load containment is not simply to keep products on a pallet. The goal is to create a single, stable unit that moves as one throughout the shipping process.

Insufficient Stretch Wrap

One of the most common causes of load shifting is inadequate stretch wrap application.

Problems often include:

• Too few wrap revolutions
• Inconsistent film tension
• Insufficient containment force
• Film not extending high enough on the load
• Failure to secure the load to the pallet

When stretch film is applied improperly, cartons are free to move independently during transportation.

Even small amounts of movement can compound throughout a trip and eventually lead to significant load instability.

Poor Load-to-Pallet Attachment

A surprisingly common issue occurs when the load is wrapped but not properly attached to the pallet itself.

The stretch film may secure the cartons together while allowing the entire load to slide on the pallet deck.

This creates a situation where:

• The product shifts
• The pallet remains stationary
• Load stability deteriorates rapidly

Proper wrap patterns should anchor the load to the pallet whenever product characteristics allow.

Weak Pallet Patterns

Load stability begins before stretch film is ever applied.

Improper stacking patterns often contribute to shifting loads.

Common issues include:

• Uneven carton placement
• Excessive overhang
• Unsupported edges
• Poor weight distribution
• Inconsistent pallet patterns

A strong pallet pattern creates a stable foundation that allows the stretch film to perform effectively.

Even the best stretch wrapping equipment cannot fully compensate for a poorly built load.

Insufficient Containment Force

Many operations focus on the amount of film being applied rather than the containment force being generated.

These are not the same thing.

Applying more film does not automatically improve load stability.

In many cases, excessive film usage simply increases packaging costs without significantly improving performance.

Properly applied stretch film should create consistent containment force throughout the load while minimizing unnecessary film consumption.

Modern stretch wrappers help achieve this by applying controlled tension and repeatable wrap patterns.

Product Characteristics Matter

Some products are naturally more difficult to stabilize than others.

Examples include:

• Lightweight cartons
• Slippery packaging materials
• Irregular product shapes
• Tall narrow loads
• Flexible products
• Mixed SKU pallets

These loads often require additional containment strategies such as:

• Corner boards
• Top caps
• Additional reinforcement wraps
• Specialized wrap patterns

Understanding product characteristics is essential when designing an effective packaging solution.

Damaged or Poor-Quality Pallets

Sometimes the pallet itself is the problem.

Broken boards, damaged deck surfaces, and weak pallet construction can compromise load stability before the shipment even begins.

Inspect pallets for:

• Broken deck boards
• Missing boards
• Loose fasteners
• Structural damage
• Excessive wear

A stable load requires a stable foundation.

The Role of Stretch Wrapping Equipment

Manual wrapping often produces inconsistent results because every employee wraps differently.

Variations in:

• Film tension
• Wrap patterns
• Number of revolutions
• Containment force

can lead to significant differences in load stability.

Semi-automatic and automatic stretch wrappers help eliminate this inconsistency by applying repeatable wrap patterns and controlled film tension to every load.

The result is improved load containment, better shipping performance, and fewer transportation-related issues.

Reducing Freight Claims

Load shifting is one of the leading contributors to freight damage claims.

When products move during transit, the consequences often include:

• Crushed cartons
• Product damage
• Customer complaints
• Shipment rejections
• Increased freight costs
• Lost customer confidence

Improving load stability reduces the likelihood of these issues while helping ensure products arrive in the same condition they left the facility.

Best Practices for Improving Load Stability

To minimize load shifting during transit:

• Build consistent pallet patterns
• Eliminate product overhang
• Use quality pallets
• Apply sufficient containment force
• Secure loads to the pallet
• Utilize corner boards when appropriate
• Standardize wrapping procedures
• Consider semi-automatic or automatic stretch wrapping equipment
• Regularly evaluate load performance during shipment

Small improvements in packaging practices can often produce significant improvements in shipping performance.

Conclusion

Pallet loads rarely shift during transit because of a single issue. More often, load movement is the result of inadequate containment, poor pallet patterns, inconsistent wrapping practices, or weak load construction. By understanding the forces loads experience during transportation and implementing proven load containment strategies, businesses can dramatically reduce product damage, improve shipment reliability, and minimize costly freight claims.

At Ameripak, we help manufacturers, warehouses, and distribution operations improve load stability through stretch wrapping equipment, packaging solutions, and proven load containment strategies. Whether you’re experiencing recurring freight claims or simply looking to improve shipping performance, we’re standing by to advise or assist.