Can You Move a Loaded Shipping Container?

The Short Answer — Yes, But There Are Real Conditions

Although it is possible to safely move a loaded shipping container, it is not always the practical choice due to equipment requirements, transport regulations, and route limitations. These complexities can be cumbersome without experience.

The two main factors to consider before settling on a decision are:

  • Total Weight: The sum of the empty container’s weight and the cargo. It must fall within the legal limits or be accompanied by the necessary permits if it exceeds them.
  • Cargo type: The contents of the container matter, as certain items may need additional regulatory compliance, securement and specialized handling.

Below is an in-depth guide on why these two factors are the key considerations  when deciding on whether to employ a container hauling company or to (DIY) do it yourself.

How Much Can a Loaded Container Legally Weigh in Transit?

In addition to the container type, a container’s legal weight depends on federal weight limits. The Federal bridge law and axle weight laws can, at times, mean legal loads become illegal, depending on weight distribution. The legal bounds are:

  • Gross Vehicle Weight to showcase no more than 80,000 lbs. on the interstate system, that is, the chassis, tractor, cargo, container, driver, and fuel.
  • Axle Limits on a single axle should not exceed 20,000 lbs., and 34,000 lbs. on a tandem axle group.
  • The Bridging Formula ensures the weight is safely spread across all axles.
40 Foot Loaded Container on a Step Deck trailer.

However, approved weight permits and other legal exemptions allow the shipping container to be moved without any repercussions.

How Does Container Weight Plus Truck Weight Add Up Fast?

The gross vehicle weight can feel exaggerated, as even a 40ft container can sometimes accommodate only a limited amount of cargo within the legal weight limits. In detail;

  • Tractors weigh between 18,000 and 22,000 lbs.
  • Container chassis weigh between 7,000 and 10,000 lbs. while 
  • An empty 40-foot container weighs between 8,000 and 9,000 lbs.

The equipment alone can weigh between 33,000 and 41,000 lbs., which means less cargo capacity before reaching the 80,000-lb limit. In case the weight limit is exceeded, overweight permits become mandatory.

Crane loading container

When are Overweight Permits Required and What Does the Process Look Like?

Overweight permits are required when the gross vehicle weight exceeds the legal limit of 80,000 lbs., as stipulated by federal law. Obtaining them involves;

  1. Confirming the load is non-divisible, meaning it cannot be separated into smaller pieces
  2. Calculating the axle and gross vehicle weights and gathering other relevant information
  3. Evaluating whether you can make a legal trip on the planned route
  4. Applying for permits needed across the states involved and providing the supporting documents
  5. Receiving the route-specific approval and following all permit conditions, including restricted travel hours, escort vehicle requirements, and approved travel routes
  6. Paying the fees

Note that permit requirements and specifications vary by state, and approval is not automatic. Additionally, some bridges and route restrict even permitted loads to ensure safety and protect infrastructure. The load rating is therefore determined by age, design, condition, and capacity of these structures. Restrictions may result from;

  • Roadway load restrictions.
  • Local roads that prohibit overweight commercial vehicles.
  • Bridge weight limits.
  • Low-clearance.
  • Seasonal weight limitations.
  • Limitations on the number of heavy trucks on the bridge at a time

Understanding such variations helps avoid fines, delays, and non-compliance. At Container Transport, we ensure full adherence to state and federal regulations. Additionally, we source alternative routes prior to the move to ensure safe and legal pick-ups and drop-offs.

How Does Cargo Type Affect a Loaded Container Move?

The type of cargo in transit determines the preparation, handling, and transportation of a shipping container. Different goods pose different challenges, with some requiring additional regulatory compliance and precautions.

For instance:

Loading oversized container

1. Fragile or High-Value Goods 

Such goods include glass, artwork, medical equipment, or electronics, among other valuables. They require proper securement before transportation, as shifting can easily cause damage. Proper securement can involve;

  • Load bars, airbags, or dunnage
  • Blocking or internal bracing
  • Protective padding between goods
  • Tie-downs and strapping

The most suitable method is dependent on the type of cargo. Properly securing the commodities minimizes movement upon acceleration, cornering, and braking, reducing the risk of damage.

2. Hazmat Cargo

Containers moving hazardous materials are subject to additional state and federal regulations. That can be:

  • Compliance with USDOT hazardous materials regulations
  • Appropriate hazardous materials endorsement for drivers
  • Placards and labeling
  • Required shipping papers
  • An authorized carrier with training in transporting hazardous materials

Note that not all carriers can transport hazmat. Ensure you disclose your cargo type when sourcing for quotes.

3. Liquids, Machinery, Stacked Pallets, and Mixed Freight

Such cargo presents distinct challenges that require specific considerations and attention. 

  • Liquids that are not properly secured or filled can slosh during braking and cornering, compromising vehicle stability.
  • Heavy Machinery demands specialized bracing, blocking, and securement. Concentrated weight points necessitate reinforced floors.
  • Stacked Pallets require even loading and securing to avoid collapse, tipping, or shifting.
  • Mixed Freight requires proper weight distribution to prevent heavier items from damaging the lighter ones and causing an imbalance.

Load Distribution

In addition to properly securing and arranging your cargo in a container, even weight distribution ties the safety and legality of the move together. Poor distribution can:

  • Shift the center of gravity, causing the container to tilt.
  • Result in vehicle instability during emergency maneuvers and turns.
  • Cause excessive weight on a single trailer axle.
  • Increase the risk of cargo shifting or moving.

Proper weight distribution helps avoid the above. Always ensure you provide your carrier with comprehensive data on your cargo to support proper planning for compliance and safety.

How is a Loaded Container Secured Differently from an Empty One?

Transporting a loaded shipping container starts with properly securing it to the trailer, as it can weigh tens of thousands of pounds. It requires specialized securing systems to keep the container firmly tied to the trailers throughout the journey due to the cargo's added weight and shifting forces. They require;

Shipping a container on a trailer.

Twist Locks, Chains, and Binders

Twist locks are typically mounted on a container chassis, as the containers have corner castings to fit over them. The locks rotate 90 degrees, engaging the corner castings to keep the container in place. Standard containers need only four twist locks distributed across the four corners. They help prevent;

  • Lifting the container off the chassis on uneven roads and during bumps
  • Sliding in either direction
  • Shifting during braking, acceleration, and cornering

Chains and Binders provide supplemental securement when a shipping container is transported on other trailer types, such as flatbeds, rather than on a standard chassis. While the chains are attached at specific securement points on the container and trailer, the load binders tighten them, creating tension to keep the container firm. The number of chains used depends on the container weight, trailer configuration, and cargo securement regulations.

Center of Gravity and How it Changes with Cargo Inside

An empty container has a predictable center of gravity because its weight is evenly distributed, whereas a loaded container's center of gravity depends on the cargo's arrangement. For instance, if heavy items are loaded too far forward, too high, or too far to one side, the container's stability is reduced during transport. The center of gravity matters as a poorly balanced container is likely to;

  • Result in excessive weight on one axle
  • Risk of the trailer swaying.
  • Affect vehicle handling
  • Cause instability during turns.
  • Result in a rollover during an emergency maneuver.

What Happens if Cargo Shifts During Transit?

The container’s firm placement on the trailer does not prevent improperly secured cargo from shifting inside the container. Such an event can:

  • Result in unexpected stress on the floor and walls of the container
  • Result in equipment or pallets toppling.
  • Change in the container’s center of gravity. 
  • Damage the cargo and surrounding freight.
  • Make unloading challenging

Proper load securement, blocking, and bracing are mandatory to avoid such difficulties.

Shipping a Container on a RGN trailer.

The Carrier’s Responsibility Before Departure

Upon selecting a carrier for your shipping container, you should expect them to conduct a thorough pre-trip inspection, that is;

  • Ensure all twist locks are engaged and locked.
  • Confirm the container is properly seated on the trailer or chassis.
  • Check brakes, tires, lights, and other safety equipment.
  • Verify the load's stability and ensure there are no visible issues. 
  • Inspect securement devices, including chains and binders if used.

Note: The shipper is responsible for properly securing the cargo inside the container, while the carrier is responsible for properly securing the container to the vehicle.

When Does It Make More Sense to Unload First?

Despite the convenience of moving loaded shipping containers, it's not always the most practical option, and partial or full unloading may be necessary. This is mainly due to the distance of the move, cargo protection, legal weight limits, and transportation costs. The most common reasons for unloading a container are:

When the Loaded Weight Exceeds Legal Limits

That is when permits are denied for the planned route or significant permitting is needed. When the chassis, truck, cargo, and container exceed the legal limit, the carrier may need

  • Longer approved route to avoid restricted roads and bridges.
  • Overweight permits, which vary by state.
  • Axle configurations or additional equipment
  • Pilot or escort vehicles for exceedingly heavy loads
When the Cargo Is Especially Fragile

A shipping container can also be unloaded due to cargo that is highly sensitive to movement or vibration. Such items include;

  • Precision machinery
  • Glass products
  • Artwork and antiques
  • Delicate electronics
  • Laboratory or medical equipment

This may require specialized packaging or separate transport.

Transporting a container

Cost Comparison: Permit Fees VS Unloading and Reloading Labor

Before deciding whether to unload or obtain permits to move a loaded shipping container, it's advisable to first compare prices.

Moving a loaded container involves:

  • Overweight permit fees
  • Escort or pilot car expenses
  • Additional routing costs
  • Increased transit duration as per permit restrictions

Unloading the container involves:

  • Added handling times
  • Crane and forklift services
  • Temporary storage when necessary
  • Labor to unload and reload

Unloading the container first, especially where specialized routing or multiple permits are required, can sometimes be more cost-effective.

Short Moves vs. Long-Haul Shipping Container Cost Variation

Moving loaded containers is most cost-effective over shorter moves that comply with weight regulations and route restrictions. 

Interstate shipments or long-haul moves often require multiple permits across different states and entail logistical complexity and travel restrictions, making it less cost-effective to move loaded containers.

Note that the best approach depends on the cargo type, routing, container weight, and distance traveled.

Why Choose Container Transport?

A specialized container hauler like Container Transport helps you choose the most suitable and economical options for moving loaded and empty containers. We have more than a decade of experience across the nation in sourcing permits, cargo-aware planning, and properly securing equipment. Reach out to us for a non-obligatory quote.

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