Building materials/Density-rated
Drywall freight class and NMFC guide
Drywall is heavy, brittle, and usually shipped in large flat units. Density is high and stable, so the class is rarely a surprise — but damage and handling are.
Reviewed November 11, 2026 · Reference 2026.11 · Estimate, not a classification
At a glance
DensityClassification basis
Density-rated
Typical packed density
40–55 lb/ft³
Tight estimate
Density-rated span
Class 50–55
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 drywall.
Drywall density is high because the core is solid gypsum. The class is usually stable, and the bigger risk is damage: cracked corners, broken edges, and moisture stains can turn a clean delivery into a claim. The shipping unit matters. A full bundle is dense and stackable; a partial bundle with loose sheets is harder to secure and easier to measure differently. Keep the stack flat and supported along its length.
Density-rated. Gypsum board is generally density-rated. The shipping unit is the bundle or stack, not the individual sheet.
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 | Typical span |
| 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 or stack, including any protective edges.
- Use gross weight; a full unit is heavy enough to require lift equipment.
- Measure each thickness or board type separately.
The formula
cube = L × W × H ÷ 1,728
density = gross lb ÷ cubeRound for display only. Compare the unrounded density to the scale boundary.
Fragile
Needs securement, cushioning, or a damage-resistant loading position.
Heavy / concentrated load
Weight distribution, axle limits, and lift equipment need a pre-booking check.
Moisture-sensitive
Needs wrap, desiccant, or a dry loading position to avoid a damage claim.
Pack it for the rating
Packaging changes the cube before it changes the class.
- Keep the stack flat and fully supported. Overhang at the ends invites breakage.
- Protect the board from rain and standing water; moisture damage is not a freight-class issue, but it is a claim.
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.
Plaster and joint compound
Cement board
Plywood
Before you book
Make the rating defensible.
- Confirm the item for the specific board type and thickness.
- Ask whether the carrier can lift and secure a full unit at the dock.
- Photograph the stack and any edge damage before pickup.
BOL description template
Starting pointDrywall, [thickness] in, [quantity] sheets per bundle, [number] 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
Drywall and the 2025 scale.
How are drywall classified for LTL freight?
At an estimated packed density of 40–55 lb/ft³, the 2025 density scale spans Class 50–55. 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 drywall?
Density-rated. Gypsum board is generally density-rated. The shipping unit is the bundle or stack, not the individual sheet.
How do I confirm the NMFC item for drywall?
Confirm the item for the specific board type and thickness. Ask whether the carrier can lift and secure a full unit at the dock. Photograph the stack and any edge damage before pickup. Confirm the current item in ClassIT+ or with the carrier before booking.
Related commodities
Keep the comparison close.
Building materials
Lumber
Lumber is dense and stable, so density is rarely the hard part. The classification question is usually the species, grade, treatment, and whether the load ships as loose boards, a bundle, or a unit.
Class 55–65Building materials
Plywood
Plywood is dense and ships in flat, stackable units. Density is stable, but the number of sheets per unit and the way the unit is banded can change the measured cube.
Class 55–60Building materials
Insulation
Insulation is extremely light for its cube, so it usually lands in the most expensive density tiers. Compression and packaging are the difference between a full load and a costly one.
Class 250–400Furniture & 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.