Palletised Freight

The standard pallet size used in North America is 48 inches × 40 inches, which is commonly referred to as the GMA (Grocery Manufacturers Association) pallet. This size has become the dominant standard because it maximizes space efficiency in North American trailers, which are typically 48 or 53 feet long. When two rows of 48" × 40" pallets are loaded side by side, they fit precisely within the standard 96-inch interior width of most trailers.

However, North America also uses several other pallet sizes for specific applications. Half pallets measuring 48" × 20" are popular for retail displays and smaller shipments. Block pallets of 48" × 48" are used for heavy industrial goods, while drum pallets of 42" × 42" accommodate cylindrical containers and chemical drums. The size you need depends on your specific cargo, carrier requirements, and end-destination handling capabilities.

International shipments may require Euro pallets, which measure 47.2" × 31.5" (1200mm × 800mm), to comply with European handling standards. If your supply chain crosses international borders, confirm with your freight carrier or logistics provider which pallet sizes are accepted at each point in the journey to avoid costly repacking charges.

When selecting a pallet size, also consider the weight capacity you need. Standard GMA pallets support up to 4,600 lbs static and 2,800 lbs dynamic loads, while heavy-duty wooden pallets can handle 7,500 lbs static. For very heavy industrial cargo, metal or steel pallets rated at 10,000+ lbs static may be more appropriate, though they cost significantly more.

Freight class is determined primarily by density, which is calculated by dividing the shipment weight in pounds by its volume in cubic feet. To calculate cubic feet, multiply the length, width, and height of the shipment in inches and divide by 1,728 (the number of cubic inches in a cubic foot). Then divide the total weight by this cubic footage to get the density in pounds per cubic foot.

The National Motor Freight Classification (NMFC) system assigns freight classes from 50 to 500 based on this density calculation, combined with considerations for stowability, handling requirements, and liability. Class 50 (density over 50 lbs/cu ft) is the lowest and least expensive class, while Class 500 (density under 1 lb/cu ft) is the highest and most expensive.

For example, if your pallet is 48" × 40" × 48" and weighs 800 pounds, your cubic footage is (48 × 40 × 48) ÷ 1,728 = 53.33 cubic feet. Your density is 800 ÷ 53.33 = 15 lbs/cu ft, which falls into approximately Class 100. This density-based calculation is the starting point, but some commodities have specific NMFC class assignments regardless of density.

Misclassifying your freight, even unintentionally, can result in reclassification fees from the carrier plus the difference in shipping costs. Many carriers offer free freight classification assistance, and working with a licensed freight broker or logistics provider can help ensure accurate classification from the start. Some carriers now use dimensioners at their terminals to verify that stated dimensions and resulting freight class are accurate.

Less-than-truckload (LTL) shipping involves combining shipments from multiple different customers into the same truck, with each shipper paying only for the space their pallets occupy. This shared-cost model makes LTL ideal for shipments of 1-6 pallets or loads under 10,000-15,000 pounds. LTL freight moves through a network of carrier terminals, where pallets are transferred between trucks at intermediate stops, which typically adds 2-7 days to transit time compared to direct routing.

Full truckload (FTL) shipping dedicates an entire truck exclusively to your cargo, typically at a flat rate rather than per pallet or per pound. FTL becomes cost-effective when you have 7 or more pallets, shipments exceeding 10,000-15,000 pounds, or cargo that fills at least half of a 53-foot trailer. A standard trailer holds 26 standard pallets in a single layer with a maximum weight of 45,000 pounds.

The key trade-offs between LTL and FTL are cost versus speed and handling. LTL is generally more economical for smaller loads but involves multiple handling events at transfer terminals, increasing the risk of product damage and extending transit times. FTL offers faster transit (typically 1-3 days) and reduces handling since the freight travels directly from origin to destination without transfers.

For fragile, high-value, or time-sensitive shipments, FTL is often worth the additional cost even for smaller loads. Conversely, for routine business-to-business shipments of durable goods where 3-7 day transit times are acceptable, LTL offers excellent value. Many businesses use both methods strategically depending on the specific shipment characteristics.

Proper securing and wrapping of palletised freight is critical to preventing damage during transit and ensuring your cargo arrives at its destination in the same condition it left your facility. The most common method is stretch wrapping, which involves applying multiple overlapping layers of stretch film around the entire load including the pallet base. Begin wrapping at the bottom, anchoring the film to the pallet base, then work upward with at least 50% overlap between each pass. Apply 4-6 layers minimum, with additional layers on edges and corners where stress concentrates.

For heavier loads exceeding 2,000 pounds or shipments traveling long distances, supplement stretch wrap with plastic or polypropylene strapping applied both horizontally and vertically across the pallet. Use edge protectors at corners where straps cross to prevent cutting into the cargo and damaging box edges. Strapping provides the tensile strength needed to prevent tall stacks from tipping during sudden braking or sharp turns.

The stacking pattern you use also significantly affects load stability. The brick or interlocking pattern—where each layer rotates 90 degrees relative to the layer below—creates a self-supporting structure that is much more resistant to toppling than a column stack where boxes align vertically throughout. Always place the heaviest items on the bottom and distribute weight evenly across the pallet surface, ensuring no more than 3-4 inches of overhang beyond the pallet edge.

After wrapping, verify that the load meets carrier height restrictions (typically 72 inches maximum for truck shipments, including the pallet) and that the total weight is within the pallet's rated capacity. Label the load with shipping information on at least two adjacent sides, and attach any required handling instructions such as "Fragile," "This Side Up," or "Keep Dry." Document the final weight and dimensions before tendering the shipment to the carrier.

Every palletised freight shipment requires a Bill of Lading (BOL), which serves as the legal contract between the shipper and the carrier and as the receipt for the cargo. The BOL must include the shipper and consignee contact information and addresses, a description of the freight, the freight class, the number of units or pallets, the total weight, and any special instructions such as liftgate required or residential delivery. The carrier signs the BOL upon pickup, creating a legally binding record of the condition and quantity of cargo accepted.

In addition to the BOL, each pallet must display labels on at least two adjacent sides showing the destination address, origin address, purchase order or reference number, number of units on the pallet, and any handling requirement icons. For LTL shipments, the carrier will also apply their own bar-code tracking label at pickup or at the first terminal. Keep a copy of all documentation including photographs of the packed pallets before they leave your facility—this evidence is invaluable if you need to file a damage claim.

For international shipments, additional documentation is required including a commercial invoice with detailed product descriptions, HS tariff codes, unit values, and country of origin; a packing list itemizing all contents; and a certificate of origin if claiming preferential tariff treatment under a trade agreement such as the USMCA. Hazardous materials require DOT-compliant shipping papers, proper placard labels on the pallet, and in many cases advance notification to the carrier.

Missing or incomplete documentation is the leading cause of shipment delays and customs holds. Creating standardized documentation templates for your common shipments and using a carrier's electronic BOL system when available can significantly reduce errors. For complex or high-value international shipments, using a licensed customs broker to prepare and review documentation is strongly recommended.

The most common causes of palletised freight damage are inadequate packaging that fails to protect cargo against normal shipping forces, improper weight distribution that creates instability during transit, insufficient securing that allows the load to shift when the truck brakes or turns, and overstacking that exceeds pallet weight ratings or carrier height limits. Understanding these causes helps you design packaging and loading procedures that minimize damage risk.

Preventing packaging-related damage starts with selecting the right corrugated box strength for your product weight and using appropriate void fill to prevent items from shifting inside boxes. Test your packaging by loading pallets and shaking them vigorously before shipping—if you can hear or feel movement inside boxes, add more void fill. Apply reinforcing tape to box seams and edges, and consider double-boxing fragile or high-value items.

Proper weight distribution is equally important. Load the heaviest and most stable items on the bottom layer directly over the pallet stringers (the solid boards that the forklift enters). Build up with progressively lighter items, keeping the center of gravity as low as possible. The load should not lean or tilt in any direction when the pallet is lifted. For mixed-product pallets, separate heavier from lighter items and ensure all layers are complete before starting the next level.

Even with perfect packaging and stacking, damage can occur at carrier terminals during unloading and transfer. Choosing carriers with lower claims rates (ask potential carriers for their claims frequency statistics), using direct FTL service instead of LTL for fragile cargo, and filing a thorough damage claim immediately upon delivery are all important strategies for managing freight damage risk. Always inspect palletised deliveries in the presence of the delivery driver and note any visible damage on the BOL before signing.