How the figures are checked
Every figure on this site comes from a data row that names its sources and the date each source was read. A row counts as checked only when its sources were read and agree with it; equipment dimensions need two independent spec sources. Until every row on a page is checked, the page stays out of search.
Which sources count
- The body that sets the figure: NMFTA for freight class, EPAL and ISO for pallet standards, the federal regulation for truck size and weight.
- The maker or operator of the equipment: trailer manufacturers’ spec sheets, ocean carriers’ container specifications.
- Carriers and logistics providers, for practice such as how freight is measured or how many pallets a trailer is loaded with.
- Vendors and trade press only where nothing above publishes the figure. These rows are labelled in the sources list.
Check dates
The check date beside a table is the latest date one of its sources was read. It moves only when someone has read the source again, not when the page is edited. A monthly check compares each row with its source and logs any change.
Spreads, not averages
Trailer and container makers build to slightly different inside dimensions, and guides quote different pallet counts for the same trailer. Where sources disagree, the table shows the range and each source’s own figure, and the page says what causes the difference.
Units and rounding
Each figure is stored in the unit its source used. The other unit is converted exactly (1 in = 25.4 mm, 1 lb = 0.45359237 kg) and rounded to the nearest millimetre, tenth of an inch, kilogram or pound. Calculators work in inches and pounds. The freight class calculator can round each dimension up to the next whole inch, as some carriers and brokers do, but leaves it off by default because NMFTA’s own guidance gives no rounding rule.
What is published
A page is published to search engines only when every row on it is checked against its sources. A page with a row still being checked carries a note at the top and is marked noindex.
Source log
- Surcharge quicksheet, effective January 6, 2025, FedEx Freight.
- LTL freight, FedEx Freight (Canada).
- What your accessorial charges mean, Old Dominion Freight Line.
- LTL pricing guide, Old Dominion Freight Line.
- LTL guide, Old Dominion Freight Line.
- What is less-than-truckload?, XPO.
- Mastering LTL freight pricing, ABF Freight.
- LTL freight shipping: a beginner’s guide, ABF Freight.
- Transportation glossary (PDF), Estes Express Lines.
- LTL freight shipping explained (PDF), Estes Express Lines.
- What is LTL freight shipping?, Estes Express Lines.
- Estimating multifactor productivity in truck transportation, section 2, Bureau of Transportation Statistics.
- Freight glossary, FHWA.
- Classification, NMFTA.
- Reefer equipment specifications, Maersk.
- High cube dry container dimensions, DSV.
- Guide to dry cargo container types, MSC.
- Dry equipment specifications, Maersk.
- Reefer technical specifications, CMA CGM.
- Containers brochure, CMA CGM.
- Container information, Ocean Network Express (ONE).
- Dry containers, Ocean Network Express (ONE).
- 40 ft reefer high cube container, Hapag-Lloyd.
- 20 ft reefer container, Hapag-Lloyd.
- 45 ft high cube container, Hapag-Lloyd.
- 40 ft high cube container, Hapag-Lloyd.
- 40 ft standard container, Hapag-Lloyd.
- 20 ft standard container, Hapag-Lloyd.
- Container specification brochure (03/2016), Hapag-Lloyd.
- ISO 668:2020 Series 1 freight containers: classification, dimensions and ratings, ISO.
- Pallet types, Hillebrand Gori.
- How many pallets fit in a container, Ship4wd.
- How many pallets fit in a container, iContainers.
- How many pallets fit in a truck, Mercer Transportation.
- Standard pallet size, NTG.
- How many pallets fit in a trailer, Anderson Trucking Service.
- Single drop dimensions, Ryan Transportation.
- Pinwheel pallet loading, Hale Trailer.
- Dry van dimensions and capacities, Hale Trailer.
- 53 ft refrigerated trailer, Penske Truck Rental.
- 48 and 53 ft dry van trailers, Penske Truck Rental.
- Trailer guide, Freight Sidekick.
- Flatbed equipment guide, C.H. Robinson.
- Truckload equipment guide, C.H. Robinson.
- 4000AE drop deck, Utility Trailer.
- Step deck build sheet FLD-0026-00053, Great Dane (sheet hosted by Maxim).
- Velocity drop deck 53 ft spec sheet, Fontaine (sheet hosted by Hale Trailer).
- Infinity drop deck 53 ft spec sheet, Fontaine (sheet hosted by Hale Trailer).
- Infinity drop deck 53 ft, Fontaine.
- Infinity flatbed 48 ft, Fontaine.
- Flatbed specifications, Utility Trailer.
- Everest reefer brochure, Great Dane.
- Reefer specifications (3000R), Utility Trailer.
- Refrigerated van brochure, Hyundai Translead (hosted by CT Power).
- HT ThermoTech refrigerated van, Hyundai Translead.
- 48 ft dry van build sheet, Hyundai Translead (sheet hosted by Hale Trailer).
- 53 ft HyCube dry van build sheet, Hyundai Translead (sheet hosted by Hale Trailer).
- Dry van brochure, Hyundai Translead.
- Composite dry van, Hyundai Translead.
- 4000D-X Composite 100 features, Utility Trailer.
- Dry van brochure, Utility Trailer.
- Dry van specifications, Utility Trailer.
- DuraPlate HD dry van product sheet, Wabash.
- DuraPlate dry van product sheet, Wabash.
- 23 CFR 658.15 Width (text of the regulation), FindLaw.
- 23 CFR 658.17 Weight (text of the regulation), Cornell Law School LII.
- Size and weight: questions and answers on federal size limits, FHWA Office of Freight Management and Operations.
- Size and weight: questions and answers on federal weight limits, FHWA Office of Freight Management and Operations.
- Recycled pressed wood pallet 40 × 48 in (PWP-4840), Zoro.
- Vestil SPL-4048 galvanized steel pallet, WebstaurantStore.
- Galvanized steel open-deck pallet 40 × 48 in (Vestil SPL-4048), Global Industrial.
- Aluminum pallet 40 × 48 × 5¼ in, four-way (New Age), Global Industrial.
- Aluminum pallet, 48 × 40 in (H-4062), Uline.
- Pressed wood pallet, 48 × 40 in (H-1032), Uline.
- How much does a wood pallet weigh?, ParcelPath.
- Euro pallet vs US pallet, Mecalux.
- GMA pallet, Interlake Mecalux.
- Standard pallet size and dimensions, CSA Transportation.
- Standard pallet size guide, 48forty Solutions.
- Beyond the standard pallet size, Millwood.
- Standard pallet sizes, Eastern Lift Truck Co..
- Pallet, Wikipedia.
- Industry standard pallet sizes: a complete list, Nelson Company.
- Understanding pallet weight, Kamps Pallets.
- Standard pallet sizes with chart, Kamps Pallets.
- Pallet sizes take-away chart, Kamps Pallets.
- GMA pallet guidelines, Kamps Pallets.
- 40 × 48 RCKO LD pallet, ORBIS.
- 40 × 48 P3 pallet, ORBIS.
- PWN-4840-PRESS-N presswood pallet specification, Nelson Company.
- NPP-4840-N-RackNest plastic pallet specification, Nelson Company.
- GL-4840-N-ExNest plastic pallet specification, Nelson Company.
- CP-4840-N-100 plastic pallet specification, Nelson Company.
- PWN-4840-GMA-S wood pallet specification, Nelson Company.
- 40 × 48 GMA rackable 2800 pallet, Rehrig Pacific.
- What are ISO standard pallet dimensions?, iGPS.
- Pallet spec sheet, iGPS.
- CHEP North America 48 × 40 in pallet specification, CHEP (sheet hosted by Qimarox).
- Pallet spec sheet (Spanish edition), PECO Pallet.
- Pallet specifications, PECO Pallet.
- The science behind pallet load capacity, Pallet Enterprise.
- Pallet standards and specifications: the evolution to today, Pallet Enterprise.
- Pallet Design System specification, drawings and analysis (example printout), Pallet Foundation / NWPCA.
- GPAL product magazine (older edition), EPAL Germany (GPAL).
- EPAL load carriers overview, EPAL.
- EPAL 7 half pallet, EPAL.
- EPAL 6 half pallet product data sheet, EPAL.
- EPAL 6 half pallet, EPAL.
- EPAL 3 pallet, EPAL.
- EPAL 2 pallet product data sheet, EPAL.
- EPAL 2 pallet, EPAL.
- EPAL Euro pallet data sheet (05/2025), EPAL.
- EPAL Euro pallet product data sheet, EPAL.
- EPAL Euro pallet (EPAL 1), EPAL.
- ISO 6780:2003 Flat pallets for intercontinental materials handling: principal dimensions and tolerances, ISO.
- Vital freight measurements, FreightCenter (broker).
- Density calculator, TForce Freight.
- Measuring your shipment, Yellow.
- Zone-based rates, effective January 5, 2026, FedEx Freight.
- Rules tariff item 1014, Pitt Ohio.
- NMFC changes, Averitt Express.
- NMFC changes (flyer, May 2025), FedEx Freight.
- NMFTA implements historic NMFC changes, NMFTA.
- LTL freight density calculator, NMFTA.
- How is the density of a handling unit calculated?, NMFTA Help Center.
- The National Motor Freight Classification (NMFC), NMFTA Help Center.
- NMFC classification FAQs, NMFTA Help Center.
- NMFC changes FAQ: density and class breaks for the new 13-sub structure, NMFTA Help Center.
- Decoding density: the freight factor you can’t afford to overlook, NMFTA.
- Disposition Bulletin 1371, Docket 2025-1, NMFTA.