A is an unpowered vehicle pulled by a powered vehicle.
Some non-American dialects distinguish a (generally uncovered, used for goods and materials) from a Caravan ( Travel Trailer ) (generally weather-resistant, used for human habitation).
There are five main types of trailer, defined by their axle arrangement and method of combination.
A semitrailer is supported at its forward end by a fifth wheel (or gooseneck ball) mounted on a truck or Dolly and at the rear end by its own wheels.
A full trailer is supported by axles front and rear and pulled by the way of a Drawbar . In Europe this is also know as A-Frame drawbar trailer.
A simple trailer is pulled by a drawbar, but has a single set of axles
A trailer meant for housing people while Camping , towed by a motorized vehicle.
An A-train is a semi-trailer attached to an A-dolly . The A-dolly is connected to the tractor or another trailer in front of it with a single draw-bar, thus giving it two articulation points and little roll stiffness.
(See Road Train )
A B-train is a semi-trailer attached to a fifth-wheel mounted on the rear of another semi-trailer.
A C-train is a semi-trailer attached to a C-dolly. The C-dolly is connected to the tractor or another trailer in front of it with two draw-bars, thus eliminating the drawbar connection as an articulation point. The axle on a C-dolly is self-steerable to prevent tire scrubbing.
A one or two wheeled trailer pulled by a bicycle.
Trailers built for hauling cargo come in different shapes depending on their use.
- Agriculture
- --- Corn (double bottom hopper)
- --- Grain (hopper / no-hopper, open-tarp top)
- --- Livestock (belly or straight)
- Auto carriers (5-car, 9-car, 6-car enclosed)
- Beverage
- Chip/wood product
- Container chassis, designed to carry standard 20 feet and 40 feet containers
- Curtainside / tauntliner - half-flatbed/half van, vans whose sides are made of fabric and can be easily removed enclosed cargo trailers
- Doubles / triples - or ''"pups"''
- Dropdeck – steel and composite
- Dump - aluminum and steel; rear dump (frame or frameless) and bottom dumb
- Extendable - flatbed and drop style
- Flatbed - steel and composite; (can have bulkhead, spread axles)
- Lowboy - (gooseneck) hydraulic detachable and mechanical detachable; flip-up
- Platform
- Pole/logging - a single I-beam frame running the length of the trailer, with two "U" shaped holding arms at each end
- Sliding axle and hydraulic tail (lift) or dove-tail (heavy loads)
- Specialized multi-axle (gooseneck; for extreamly heavy loads)
- Tag
- Tank
- --- Tank - asphalt
- --- Tank - compressed Industrial Gas (helium, argon, etc.)
- --- Tank - dry bulk (hopper)
- --- Tank – petroleum (oil and gasoline; can be chassis tank with pup)
- --- Tank – stainless steel (milk; can be sanitary)
- Transfer
- Utility
- Van - (enclosed van, the most common type of trailer-approximately: U.S.-41.7%, essentially a box on wheels)
- --- Van - dry freight
- --- Van – refrigerated (reefer), insulated vans for the transport of perishable goods
- --- Van - single and double drop; moving / furniture van
: NOTE: There are many types of vans, vans made of wood, metal and/or fiberglass, smooth or ribbed, generally used for dry goods or equipment transport
- Benson International
- Cargo Mate
- Circle C
- Clark Trailer Service
- Clement Industries
- Danco Trailers
- Double Hitch Company
- East Manufacturing
- Forest River
- Fontaine Trailer
- Fruehauf
- Globe Trailers
- Great Dane Trailers
- Haultec Trailers
- Hyundai Translead
- Innovative Trailers
- Kenworth
- Landoll
- MAC Trailer Manufacturing
- Manac
- Martin Marietta Composites
- Max-Atlas Equip International
- Merritt Equipment
- Ranch Manufacturing
- Reinke Manufacturing
- Reitnouer
- Rogers Brothers
- S and H Trailers
- SmithCo Manufacturing
- Steco
- Stoughton Trailers
- Summit Trailer Sales
- Texas Bragg
- Thru-Way Trailers
- Trail King Industries
- Transcraft
- Travis Body & Trailer
- Trinity Trailer Manufacturing
- Utility Trailer Manufacturing
- Vanguard National Trailer
- W-W Trailers
- Warren Equipment
- Wilkens Manufacturing
- Wilson Trailer
- X-L Specialized Trailers
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