Freight Class

Freight class is the NMFC-based shipping classification used to assign less-than-truckload freight to one of 18 classes from 50 to 500, based on how difficult the commodity is to transport. It is determined primarily by density, stowability, handling, and liability; lower-density, harder-to-handle, or higher-risk freight is assigned a higher class and usually a higher shipping cost.

In a manufacturing or warehouse environment, freight class is used when shipping finished goods, subassemblies, or raw materials by LTL so carriers can rate the shipment consistently. Operations teams calculate it from dimensions and weight, convert volume to cubic feet, and derive density before matching the commodity to the correct NMFC class. On the shop floor, correct classing affects pallet build design, carton selection, dunnage, and whether the load must be split into denser, smaller units to avoid inflated class from excessive cube. Freight class is often captured alongside SKU, carton count, pallet count, and NMFC code so receiving, transportation, and procurement can compare carrier quotes and avoid reclassification charges at the dock. For inbound components arriving as LTL, a wrong class can trigger accessorial fees, delayed receiving, or mismatches between purchase order freight assumptions and carrier invoice.

• ⚠️Misclassified density: If a shipment is measured with the pallet excluded or the weight is overstated, the computed density can push the load into the wrong class, causing re-billing or audit charges after pickup.
• ⚠️Poor palletization / bad stowability: Oversized, irregular, or non-stackable packaging makes freight harder to stow in the trailer, raising the class and increasing cost even when the item itself is not heavy.
• ⚠️Under-declared liability or handling risk: Fragile, high-value, or special-handling items can be assigned a higher class; coding them as ordinary freight invites carrier reclassification and terminal delays.