Freight class is a standardized system that helps determine how goods are shipped and at what cost. For freight forwarders and businesses shipping Less Than Truckload (LTL), this classification ensures accurate pricing, proper handling, and minimized disputes. The system is regulated by the NMFC and includes 18 classes based on specific criteria. Knowing your freight class is essential for staying competitive and avoiding costly mistakes.

Every shipment is evaluated using four main factors: density, stowability, handling, and liability. Density is a major contributor and is calculated by dividing the weight by volume. Stowability refers to how easily cargo can be arranged with other shipments. Handling and liability account for fragility, risk, and any special care needed during transit.

Density

Density is one of the most important factors in determining freight class. It refers to how much space a shipment takes up in relation to its weight, usually measured in pounds per cubic foot. Items that are dense and compact take up less space on a trailer and are easier to stack, which typically results in lower freight classes and cheaper shipping rates. On the other hand, bulky but lightweight items use more space and are assigned higher, more expensive classes.

Stowability

Stowability measures how easily a shipment can be stored and transported alongside other cargo. Standard, stackable items with predictable shapes are easier to load and take up less room, which works in your favor when assigning a freight class. However, irregular shapes, hazardous materials, or freight that cannot be stacked increases complexity and may result in a higher class. The easier your freight is to stow, the more efficient and cost-effective your shipping becomes.

Handling

Handling refers to how much effort and equipment are needed to move and transport your freight. Shipments that can be easily lifted by a forklift or pallet jack are considered low-risk and often fall into lower freight classes. Items that require special attention, such as fragile goods, oversized equipment, or those needing unique packaging, increase the handling complexity. The more difficult the freight is to manage, the higher the class and cost.

Liability

Liability considers how likely your shipment is to be damaged, stolen, or cause harm during transit. High-value or fragile items, like electronics or glassware, carry greater risk and are usually assigned to higher freight classes. Products that are more durable and less likely to break or spoil are typically placed in lower-risk classes. Insuring high-liability goods is also more expensive, which further emphasizes the need for accurate classification.

There are 18 freight classes in total, ranging from Class 50 to Class 500, each representing a different type of product based on density, handling, stowability, and liability. Below are some of the most commonly used freight classes, with examples to guide your classification process.

Class 50–85: Dense and Durable Goods

These classes are reserved for items that are heavy, dense, and easy to transport. Examples include metal parts, bricks, tiles, and industrial equipment. These goods are compact, less prone to damage, and don’t require special handling, which makes them cheaper to ship.

Class 92.5–125: Medium-Density and Common Goods

This range covers most of what businesses ship day to day. Think furniture, boxed consumer electronics, plastic goods, and machinery. These products are manageable in size and weight but may require some handling care or specialized packing.

Class 150–250: Bulky or Fragile Items

Larger, lighter, or more delicate items typically fall in this range. Examples include assembled furniture, refrigerators, and large electronics. These goods often occupy more trailer space relative to their weight and require more careful handling during transit.

Class 300–500: Light, High-Risk, or Irregular Freight

Items in these classes are either very lightweight, unusually shaped, or highly valuable. This includes products like ping pong balls, artwork, or fragile glassware. These goods are more difficult to stow and handle, and pose higher liability to carriers, which means higher shipping rates.

Prevents Unexpected Charges

Misclassified freight is one of the top reasons for shipment disputes and additional charges. Carriers often re-measure and re-weigh freight if they suspect an incorrect class has been used. This can result in reclassification fees, delayed shipments, and additional billing. Accurate classing upfront avoids surprises and ensures smooth delivery.

Ensures Proper Handling and Safety

Each freight class informs the carrier how the shipment should be handled. If fragile goods are under-classified, they might be stored under heavier items, increasing the risk of damage. Conversely, over-classification may lead to overpaying for unnecessary care. Using the right class ensures the shipment is handled as it should be, from warehouse to delivery.

Impacts Insurance and Liability Coverage

Freight class can influence the level of liability coverage provided by the carrier. If a shipment is misclassified and an incident occurs, you might not receive full compensation for damages. Accurate classification ensures your cargo is insured for its correct value and risk profile. This is especially important when shipping high-value or sensitive goods.

Freight classes can be confusing, but you don’t have to figure it all out on your own. Whether you’re shipping standard products or something out of the ordinary, we’re here to help you make sense of the system. Our team can review your shipment details, advise on best practices, and help you avoid costly missteps. Reach out today to learn how we can support your shipping needs.