Freight hauling in the U.S. isn't just "load it up and go." Every load requires a specific type of equipment, and choosing the wrong trailer can cost thousands of dollars. As a dispatcher, you're the link between the freight and the equipment.
The industry has a clear classification of trailers by purpose: enclosed (Dry Van, Reefer) for protected freight, open (Flatbed, Step Deck) for oversized and heavy loads, and specialized (RGN, Tanker, Auto Hauler) for unique jobs. Each type has its own limits on weight, dimensions, and loading method.
Federal law limits the total weight of a truck with freight to 80,000 lbs (36.3 tons) on Interstate highways. With the truck itself weighing ~35,000 lbs, that leaves ~45,000 lbs for the freight. Exceeding it = a fine of up to $10,000+ and the driver being put out of service.
Standard trailer dimensions are 53 feet (16.15 m) long, a maximum height of 13'6" (4.11 m), and a width of 8'6" (2.59 m). Dry Van capacity: 26 standard pallets. Knowing these numbers is a must for every dispatcher.
Freight is shielded from weather and theft, loaded through rear doors. Everything packaged rides here: electronics, apparel, furniture, groceries. The busiest class — and the most competitive.
No walls, no roof — it takes what will never fit inside a van: lumber, steel, pipe, machinery. In exchange the load must be secured and tarped, and the driver is the one doing it.
Built for one job: super-heavy, liquid, vehicles. Rates are clearly higher, but you need an endorsement, permits or a loading skill — you cannot put just any driver on this.
Empty tractor-trailer weight is not a constant. A sleeper, the fuel on board and the trailer type add or shave off hundreds of pounds. That is exactly why «45,000 for freight» is a ballpark, not a promise.
What is actually left for the load. A broker may post 45,000 lbs, but on a heavy tractor the scale shows overweight: a fine up to $10,000+ and the driver out of service. Weight gets confirmed before booking, not at the scale.
6 truck types that cover 95% of all freight hauling in the U.S. Each with a description, specs, and typical loads.
A standard 53-foot enclosed trailer. Protects freight from weather and theft. Used for packaged goods: electronics, clothing, food (that doesn't require temperature control), furniture, appliances. Loaded through the rear doors, sometimes through the sides.
A refrigerated trailer with a cooling/heating system. Holds temperatures from -20°F to +70°F. For perishable goods: fruits, vegetables, meat, dairy products, pharmaceuticals, flowers. Rates run 20-40% higher than Dry Van because of the cost of the equipment and the fuel to run the reefer unit.
An open platform with no walls or roof. For freight that won't fit in an enclosed trailer: building materials (lumber, steel), machinery, pipes, concrete blocks. Requires tarping (covering with a tarp) and strapping (securing with straps). Flatbed drivers earn more — the work is physically harder.
A platform with two levels: an upper deck (11') and a lower deck (37-41'). The lower section sits below a standard flatbed, which allows hauling taller freight without special permits. For construction equipment, generators, and industrial machinery.
The driver shows up with only a tractor and hooks up the customer's trailer on site. Used when the shipper has their own trailers (drop trailers). Popular with Amazon, Walmart, and large retailers. Less wear & tear on your own trailer, but a limited choice of loads.
A truck with a body on a single frame (it doesn't detach). Sizes: 16-26 feet. For local and regional deliveries, smaller loads, and last-mile delivery. Doesn't require a CDL for trucks up to 26,000 lbs GVWR. Popular for e-commerce and small carriers.
70% of all freight moves this way. The rate is the lowest here, but supply is the largest — it is easier to keep a driver loaded with no gaps between runs. 26 pallets, up to 45,000 lbs.
Pays 20–40% more than Dry Van, and costs more too: fuel for the reefer unit plus its maintenance. The range from −20 °F to +70 °F holds the whole trip — break the temperature and the load is condemned, with the carrier on the hook.
Same spread as Reefer, but the premium is for physical work: tarping and strapping are on the driver. Build that time into your delivery math, or you will run late having counted only the miles.
The highest range of the six. The lower deck sits below a standard flatbed, so freight up to 10 feet rides without permits — that saving is what you are paid for.
The least of all: the trailer belongs to the shipper, only the tractor is yours. In exchange there is no wear on your own trailer and drop and hook applies — the driver grabs a loaded trailer instead of waiting at the dock.
No CDL required up to 26,000 lbs GVWR — the lowest barrier to entry. Rate per mile looks decent, but the lanes are short: few miles per day, so daily revenue is lower than the RPM suggests.
Beyond the main 6 types, there's specialized equipment for unique freight. These types come up less often, but the rates are significantly higher — because there's less competition and specialization is required.
A flatbed with a sliding tarp (curtainside). Combines the advantages of a flatbed (side/top loading) and a dry van (weather protection). For freight that needs protection but can't be loaded through rear doors. Rates run 15-25% higher than a standard flatbed.
Removable Gooseneck — a trailer with a detachable front section. It lets machinery drive on under its own power. For construction equipment (excavators, bulldozers) and industrial machinery. Load capacity up to 150,000+ lbs with permits. Rates: $5-15/mi.
A tank for hauling liquids: fuel, chemicals, milk, water, edible oils. Requires a Tanker endorsement on the CDL and often a Hazmat endorsement. Strict cleaning rules between loads. Rates are high due to the specialization and the risks involved.
A special trailer for hauling 7-10 vehicles. Used by dealers, auctions (Copart, IAAI), and for relocations. Requires special loading skills. Rates: $1-2 per mile per vehicle × 8-10 cars = $8-20/mi total.
A pickup (Ford F-350, Ram 3500) with a 40' gooseneck trailer. For urgent and smaller loads: oil rig parts, building materials, equipment. Doesn't require a CDL if GVWR is up to 26,000 lbs. Low barrier to entry, popular among beginners.
For hauling grain, corn, soybeans, sand, gravel. Loaded from the top, unloaded through bottom hatches. Seasonal demand: during harvest season (September-November), rates spike. Off-season — few loads.
The baseline: that short bar on the left is ordinary freight. Everything below pays more, but demands equipment, a CDL endorsement or a skill your driver may not have.
This is flatbed plus 15–25% ($2.50–3.50), which is what the scale shows in dollars. A flatbed with a sliding tarp: loaded from the side and top like an open deck, yet weather-protected like a van.
The gooseneck detaches and machinery drives on under its own power — excavators, dozers, industrial equipment. Up to 150,000+ lbs with permits. The bar is long for a reason: the rate swings with dimensions, permits and a route that has to be cleared.
The longest bar is deceptive: it is $1–2 per mile per vehicle, times 8–10 cars on the deck. It cannot be compared with the rows above directly — those are rates for one load, this is a full deck.
Matching the right equipment = money. If you send a Dry Van to a load that requires a Flatbed — the driver shows up and can't load. Lost time, a TONU, and a damaged relationship with the broker. If you send a Reefer to a regular load — the driver earns less (a reefer costs more to operate, but the rate is the same as for a dry van).
Rates depend on the type of equipment. Flatbed and Reefer pay 20-50% more than Dry Van. The reason: fewer available trucks, harder work (tarping, temperature control), higher costs. If your driver runs a Flatbed — look for flatbed loads, not dry van. It's like using a Ferrari to deliver pizza.
Equipment seasonality. Reefer: peaks in spring-summer (produce season out of FL and CA). Flatbed: peaks in spring-fall (construction season). Hopper: peaks in fall (harvest). Dry Van: steady year-round, peaks in Q4 (holiday freight). Plan your drivers' loads around the season.
Weight limits by state. The federal limit is 80,000 lbs, but some states allow more with permits (Michigan — up to 164,000 lbs on certain roads). Other states have bridge formula restrictions. Always check weight limits for the specific route before booking.
Produce season: fruit and vegetables out of Florida and California. At the peak a reefer is taken off your hands; in winter rates slide almost to dry van level while the unit still costs money to run.
Construction season: until the freeze sets in it is lumber, steel and equipment. In winter a flatbed sits idle up north — it pays to move the driver south ahead of time.
Harvest, and that is it. Three months of rates spiking, nine months of almost nothing. You cannot live on a hopper year-round — it is seasonal money, not a base load.
The only one without a trough: there is always freight. Only Q4 is filled in — holiday freight, stores stocking up. That is why dry van is kept as insurance when the seasonal types go quiet.
The ceiling on Interstate highways, in force by default everywhere. This is gross weight: tractor, trailer, fuel and freight together — not just what was loaded.
Twice the federal figure — but only on certain roads and only with permits. Elsewhere the bridge formula rules: the limit depends on axle spacing, so a truck can be legal in one state and overweight in the next. The limit is checked per route, before booking.
8 questions on truck types, specs, and matching equipment.