NMFC Class 400 covers freight with a density between 1 and 2 pounds per cubic foot. At this level, a full pallet of freight may weigh as little as 40 to 80 pounds while consuming the full cubic volume of a standard pallet position. Carriers moving Class 400 freight are, in practical terms, hauling air — the trailer fills on cube long before reaching its weight limit. Deer antlers are a historically recognized Class 400 commodity and one of the odder entries in freight classification. Antlers — shed or harvested — are large, irregular, lightweight, and essentially impossible to pack efficiently. Whether bound for taxidermists, decorators, or antler-craft markets, they present the cube challenge that defines this class. Kayaks are a more commercially significant Class 400 commodity. Rotomolded recreational kayaks are 10 to 16 feet long and weigh 35 to 65 pounds — an enormous length-to-weight ratio. In manufacturer packaging, they occupy several times their weight equivalent in trailer space. Specialty kayak carriers and outdoor retail distributors typically negotiate volume arrangements rather than using standard class-based LTL rates. For shippers, Class 400 rates are among the highest in the LTL system. The only practical cost management strategies are: moving to partial truckload or full truckload pricing, consolidating Class 400 goods with other shippers through freight brokers, or redesigning product packaging to reduce cube.
Kayaks require full-length support — cradles or purpose-built packaging spanning the entire hull length — to prevent flex damage to the hull. Deer antlers in packaging may have sharp protrusions that can pierce cartons and damage adjacent freight; double-boxing with rigid spacers is advisable. Inflatable bounce houses are extremely bulky even deflated; mechanical handling and extra lateral clearance are needed. Foam insulation bundles are fragile at compression points and should not be over-strapped.
Stowability: Class 400 freight is at the practical limit of standard LTL trailer efficiency. Kayaks may be longer than pallet positions allow. Bounce houses and gazebo kits in boxes can be irregular shapes spanning multiple trailer bays. Foam and inflatable products shift easily and may require extensive bracing. Most Class 400 shipments should be quoted and moved as volume LTL or partial truckload rather than standard LTL, as the cube cost makes per-hundredweight pricing impractical.
Kayaks carry significant consumer replacement values — even entry-level models retail for $400–$1,200+. Hull damage from improper support or adjacent freight contact is a common claim. Bounce houses and large inflatable structures have high replacement costs and may be impossible to repair if punctured or seam-damaged during transit. Car covers in bulk packaging are prone to soiling and contact damage.
Class 400 covers freight with a density between 1 and 2 pounds per cubic foot. Above 2 lbs/cu ft falls into Class 300; below 1 lb/cu ft is Class 500, the highest class in the NMFC system.
Recreational kayaks are among the longest consumer goods shipped via LTL. A 14-foot kayak may weigh only 45 pounds. The packaged dimensions create a cubic volume of 30–40 cubic feet, producing a density of 1–1.5 lbs/cu ft — placing the shipment firmly in Class 400.
Standard LTL pricing at Class 400 rates can be prohibitively expensive for many shippers. Partial truckload (PTL) or volume LTL arrangements are usually more economical for consistent Class 400 freight. Freight brokers with relationships in outdoor sporting goods and seasonal goods markets can source PTL capacity at competitive rates.
Kayaks should be in their original manufacturer packaging or a full-length custom carton, clearly marked with "Long Freight" flags if over 8 feet. The carrier must be notified of the length before booking to confirm equipment compatibility. Many standard LTL carriers have length restrictions of 8–12 feet; carriers with drop-deck or long-freight capability are preferable for over-length kayaks.