Freight Operations / LTL
Freight Class in trucking
Plain-English explanation
Freight class is an NMFTA classification number — 50 to 500 — assigned to LTL freight based on density, stowability, handling difficulty, and liability. Lower numbers mean denser, easier-to-handle freight. Higher numbers mean lighter, bulkier, or more fragile cargo that costs more per pound to ship.
In a load file, this language usually matters because it changes a rate, appointment, dock instruction, delivery record, or invoice packet.
Why it matters in trucking
The freight class printed on the BOL directly determines the LTL rate. A misclassified shipment gets re-classed at delivery, and the corrected invoice can be substantially higher than the original quote — sometimes by hundreds of dollars on a single pallet.
The useful details are the ones a dispatcher or billing desk can verify later: who approved the change, when it happened, and which document shows it.
Example in real use
A shipper sends 400 pounds of bubble-wrapped glassware on a pallet. The original BOL lists Class 150, but the carrier's inspector re-weighs and re-measures at delivery and reclassifies it to Class 200 based on density. The shipper pays the higher rate.
Where it shows up
Freight class shows up in LTL rating, quoting, reclass disputes, and invoice review.
What to check first
- Weight, dimensions, density, packaging, and commodity.
- NMFC detail when available.
- Reclass risk before quoting a customer.
Common mistakes or confusion
- Using a class from memory or a past shipment without re-measuring density when the commodity, packaging, or pallet configuration changes.
- Confusing freight class with commodity code — they are not interchangeable on an LTL BOL.
- Assuming the shipper's declared class is final; carriers can re-class and re-bill after delivery.
Related terms
Related guides
Freight Terms is the best next place to keep learning this topic.
Sources and last updated
Last updated: 2026-05-10