Metals & hardware/Density-rated
Steel plate and bar freight class and NMFC guide
Steel plate and bar are among the densest common freight commodities. Density is not the uncertainty; the form, dimensions, and securement are.
Reviewed November 11, 2026 · Reference 2026.11 · Estimate, not a classification
At a glance
DensityClassification basis
Density-rated
Typical packed density
100–300 lb/ft³
Tight estimate
Density-rated span
Class 50
Reclass risk
Low
Density and packaging are stable, and the handling unit is easy to measure the same way twice.
Handling flags
Density-based estimate. Confirm the NMFC item, the packaging form, and any density subprovision before booking.
What drives the class
The density story behind steel plate & bar.
Steel density is so high that the class is usually the most favorable one on the scale. The practical issues are weight concentration, lift points, and securement. A bundle of bars includes air gaps, but it is still dense enough that the class does not move much. The form matters for the item description: plate, bar, coil, and structural shapes are not interchangeable. A carrier may also limit the weight per handling unit or require a flatbed.
Density-rated. Solid steel is density-rated and lands in the densest tier. The item still controls the description and any handling provisions.
Density thresholds
Where the estimate sits on the 2025 scale.
The highlighted rows are the classes touched by the endpoints of the typical density estimate. A single measured density returns one class; the span is a planning range. The scale is effective July 19, 2025.
| Density band | Class | Estimate |
|---|---|---|
| 50 or more lb/ft³ | 50 | Typical span |
| 35 to under 50 lb/ft³ | 55 | Reference |
| 30 to under 35 lb/ft³ | 60 | Reference |
| 22.5 to under 30 lb/ft³ | 65 | Reference |
| 15 to under 22.5 lb/ft³ | 70 | Reference |
| 12 to under 15 lb/ft³ | 85 | Reference |
| 10 to under 12 lb/ft³ | 92.5 | Reference |
| 8 to under 10 lb/ft³ | 100 | Reference |
| 6 to under 8 lb/ft³ | 125 | Reference |
| 4 to under 6 lb/ft³ | 175 | Reference |
| 2 to under 4 lb/ft³ | 250 | Reference |
| 1 to under 2 lb/ft³ | 300 | Reference |
| 0 to under 1 lb/ft³ | 400 | Reference |
Measure it right
The handling unit is the shipment.
Carriers measure what is tendered, not the product inside the box. Use the pallet, crate, or bundle as the handling unit and include everything that travels with it.
- Measure the bundle at its widest and tallest points, including banding and dunnage.
- Use gross weight; a small steel bundle can exceed a standard pallet rating.
- Confirm the weight per handling unit against the carrier limit before booking.
The formula
cube = L × W × H ÷ 1,728
density = gross lb ÷ cubeRound for display only. Compare the unrounded density to the scale boundary.
Heavy / concentrated load
Weight distribution, axle limits, and lift equipment need a pre-booking check.
Pack it for the rating
Packaging changes the cube before it changes the class.
- Banding and dunnage are part of the handling unit. Keep the bundle square and stable.
- Protect machined or coated surfaces from rubbing; steel claims are often about finish damage.
Don't confuse it with
Adjacent items, different answers.
The most expensive classification mistake is usually a description that sounds close but is not the item. Check these before you copy a description from another shipment.
Aluminum extrusions
Cast iron
Steel pipe and tube
Before you book
Make the rating defensible.
- Confirm the item for the specific steel form and dimensions.
- Ask whether the carrier requires a flatbed or a crane at origin or destination.
- Photograph the bundle, banding, and lift points before pickup.
BOL description template
Starting pointSteel [plate/bar], [dimensions], bundled, [quantity] bundles, [gross weight] lb gross, [length x width x height] in per bundle.
Add the confirmed NMFC item number before you tender the shipment. The template describes the freight; it is not a classification.
Common questions
Steel plate & bar and the 2025 scale.
How are steel plate & bar classified for LTL freight?
At an estimated packed density of 100–300 lb/ft³, the 2025 density scale spans Class 50. That is a planning span derived from the endpoints of the density estimate, not a promise that every shipment lands in every class. The NMFC item and the shipment as tendered control the final class.
What is the classification basis for steel plate & bar?
Density-rated. Solid steel is density-rated and lands in the densest tier. The item still controls the description and any handling provisions.
How do I confirm the NMFC item for steel plate & bar?
Confirm the item for the specific steel form and dimensions. Ask whether the carrier requires a flatbed or a crane at origin or destination. Photograph the bundle, banding, and lift points before pickup. Confirm the current item in ClassIT+ or with the carrier before booking.
Related commodities
Keep the comparison close.
Metals & hardware
Aluminum extrusions
Aluminum extrusions are lighter than steel but still dense enough to rate well. Long lengths, protective wrap, and the difference between mill finish and finished profiles drive the handling.
Class 55–70Metals & hardware
Fasteners
Fasteners are small, dense, and usually packed in cartons or pails on a pallet. Density is high and stable; the main risk is losing the specific item description in a generic hardware shipment.
Class 50Automotive
Auto parts
Auto parts range from dense brake rotors to bulky body panels. The class depends on the part, the packaging, and whether the shipment is new, used, or remanufactured.
Class 70–92.5Furniture & fixtures
Mattresses
Mattresses are bulky and light for their cube, so packed density usually lands in the low single digits. Compression, pallet height, and overhang move the result more than the mattress type.
Class 175–250Sources & limits
What this page is, and what it is not.
This is an independent planning reference, not the NMFC and not a carrier classification. The typical density is an estimate. The class span is derived from the 2025 density scale. The NMFC item, the carrier tariff, and the shipment as tendered control the final rating.
Reviewed November 11, 2026 · Reference 2026.11
- NMFTA — National Motor Freight Classification
The official classification system, its 18 classes, and the role of the NMFC item.
- NMFTA — 2025 NMFC changes
The July 19, 2025 effective date and the density-scale restructuring.
- NMFTA — ClassIT+
The licensed lookup for current NMFC item numbers and classification text.
- Estes — freight class and density calculator
Carrier measurement and density conventions used to sanity-check the ranges.
Next step
Measure the load, then check the class.
Use the freight class calculator for a measured density, the pallet calculator for the finished handling unit, and the chart for the full 2025 reference.