Classification Details
| NMFC | Description | Class |
|---|---|---|
| 24400.00 | Boards, Blocks or Panels, NOI, honeycomb cellular construction, expanded, see Note, item 24402, in packages, subject to Item 170 and having a density in pounds per cubic foot of: | |
| 24400.01 | Less than 1 | 400 |
| 24400.02 | 1 but less than 2 | 300 |
| 24400.03 | 2 but less than 4 | 250 |
| 24400.04 | 4 but less than 6 | 175 |
| 24400.05 | 6 but less than 8 | 125 |
| 24400.06 | 8 but less than 10 | 100 |
| 24400.07 | 10 but less than 12 | 92.5 |
| 24400.08 | 12 but less than 15 | 85 |
| 24400.09 | 15 but less than 22.5 | 70 |
| 24400.10 | 22.5 but less than 30 | 65 |
| 24400.11 | 30 but less than 35 | 60 |
| 24400.12 | 35 but less than 50 | 55 |
| 24400.13 | 50 or greater | 50 |
Notes
Note 24402: NOTE-Applies only on fabric, fiberboard, paper or metal of honeycomb cellular construction, expanded, not faced with other materials, or faced with materials other than wallboard.
How to Determine Your Class
To find the correct freight class for your shipment:
- Calculate density from the packaged unit: measure length × width × height (in inches) to get cubic feet, weigh the shipment, then divide weight by cubic feet to find pcf for class selection.
- Package per Item 170: bundle boards or panels tightly, band to a sturdy pallet, and add rigid top/bottom sheets and corner guards to resist edge crush and puncture.
- Describe clearly on the BOL: “NMFC 24400, expanded honeycomb boards/panels, density __ pcf, in packages.” Include pallet dimensions and piece count to avoid reclass delays.
- Protect geometry-sensitive product: support long spans to prevent sag, use do-not-stack cones for low-density packs, and orient cells to maximize compressive strength during transit.
Note: All classifications are subject to Item 170. Verify with official NMFC publications for the most current requirements.
Business Value
- Density-based rating unlocks savings: improving pack-out to raise pcf can move freight to a lower class and reduce LTL costs.
- Accurate paperwork and Item 170-compliant packaging minimize inspections, reclass charges, and unexpected accessorial fees.
- Non-hazardous commodity streamlines routing and carrier acceptance, enabling faster quotes and simpler tendering.
- Damage reduction on fragile honeycomb edges lowers claim rates and keeps customer fill rates and OTIF performance high.