![Scania (4-series) with EU-trailer](https://upload.wikimedia.org/wikipedia/commons/2/2a/Scania_%284-series%29_with_EU-trailer._25.25_meters.jpg)
A semi-trailer is a
trailer without a front axle. In the
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
, the term is also used to refer to the combination of a truck and a semi-trailer; a
tractor-trailer
A semi-trailer truck, also known as a semitruck, (or semi, eighteen-wheeler, big rig, tractor-trailer or, by synecdoche, a semitrailer) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer a ...
.
A large proportion of a semi-trailer's weight is supported by a
tractor unit
A tractor unit (also known as a truck unit, power unit, prime mover, ten-wheeler, semi-tractor, tractor truck, semi-truck, tractor cab, truck cab, tractor rig, truck rig or big rig or simply a tractor, truck, semi or rig) is a characteristical ...
, or a detachable front-axle assembly known as a
dolly, or the
tail of another trailer. The other portion of the semi-trailer's weight is semi-supported (half-supported) by its own wheels, which only support the rear of the semi-trailer. A semi-trailer is normally equipped with landing gear (legs which can be lowered) to support it when it is uncoupled. Many semi-trailers have wheels that are capable of being totally dismounted and are also relocatable (repositionable) to better distribute load to bearing wheel weight factors. Semi-trailers are more popular for transport than
full trailers, which have both front and rear axles. Ease of backing is cited as one of the semi's chief advantages. A road tractor coupled to a semi-trailer is often called a
semi-trailer truck
A semi-trailer truck, also known as a semitruck, (or semi, eighteen-wheeler, big rig, tractor-trailer or, by synecdoche, a semitrailer) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer ...
or "semi" in North America and Australia, and an
articulated lorry or "artic" in the UK.
Semi-trailers with two trailer units are called B-doubles (Australian English) or tandem tractor-trailers, tandem rigs, or doubles (American English). Other terms used are "
B-train
A road train, land train or long combination vehicle (LCV) is a trucking vehicle used to move road freight more efficiently than semi-trailer trucks. It consists of two or more trailers or semi-trailers hauled by a prime mover.
History
Early ...
" or (when there are three or more trailers) "
road train
A road train, land train or long combination vehicle (LCV) is a trucking vehicle used to move road freight more efficiently than semi-trailer trucks. It consists of two or more trailers or semi-trailers hauled by a prime mover.
History
Early ...
". A double-trailer combination is possible with the use of a
dolly, or "converter dolly" (Australian and American English), essentially one to three additional axles placed under the front of a second semi-trailer. The first semi-trailer is connected to the power unit using the tractor's fifth wheel coupling while the converter dolly, already attached to the second semi-trailer, is connected to the first semi-trailer with a drawbar. In Australian English, the tractor unit is called a "prime-mover", and the combination of a prime-mover and trailer is known as a "semi-trailer", "semi" or single. Some popular manufacturers are
Kenworth
Kenworth Truck Company is an American truck manufacturer. Founded in 1923 as the successor to Gersix Motor Company, Kenworth specializes in production of heavy-duty ( Class 8) and medium-duty (Class 5–7) commercial vehicles. Headquartered in ...
,
Freightliner,
Peterbilt
Peterbilt Motors Company is an List of American truck manufacturers, American truck manufacturer. Established in 1939 from the acquisition of Fageol, Fageol Truck and Motor Company, Peterbilt specializes in the production of heavy-duty (Truck c ...
, and
Mack
Properties
![Martin Rocking Fifth Wheel advertisement - You Must Use Semi-trailers](https://upload.wikimedia.org/wikipedia/commons/5/5d/Martin_Rocking_Fifth_Wheel_advertisement_-_You_Must_Use_Semi-trailers.jpg)
Semi-trailers were invented by
August Fruehauf in 1914.
Road tractors and semi-trailers are responsible for carrying a large proportion of cargo. With 1,170,117 million tonne-kilometers transported this way in the European Union, including the UK, road tractors and semi-trailers are 77.6% of the total tonne-kilometers transported in 2015, according to Eurostat.
In
road haulage Haulage is the business of transporting goods by road or rail between suppliers and large consumer outlets, factories, warehouses, or depots. This includes everything humans might wish to move in bulk - from vegetables and other foodstuffs, to cloth ...
, semi-trailers predominate over
full trailers because of their flexibility. The trailers can be coupled and uncoupled quickly, allowing them to be shunted for loading and to be trucked between depots. If a power unit fails, another tractor can replace it without disturbing the cargo.
Compared with a full trailer, a semi-trailer attached to a tractor unit is easier to reverse, since it has only one turning point (the coupling), whereas a full trailer has two turning points (the coupling and the
drawbar attachment). Special tractors are known as
shunt truck
A terminal tractor, known in the United States as a shunt truck, spotter truck, spotting tractor, yard truck, yard shifter, yard dog, yard goat, yard horse, yard jockey, hostler, or mule, is a kind of semi-tractor intended to move semi-trailers ...
s or shuttle trucks can easily maneuver semi-trailers at a depot or loading and unloading ferries. These tractors may lift the coupling so the trailer legs clear the ground.
A rigid truck and full trailer are articulated inside the cargo area length, so a semi-trailer can have a longer continuous cargo area. Because of this, a semi-trailer can haul longer objects, (
logs,
pipe
Pipe(s), PIPE(S) or piping may refer to:
Objects
* Pipe (fluid conveyance), a hollow cylinder following certain dimension rules
** Piping, the use of pipes in industry
* Smoking pipe
** Tobacco pipe
* Half-pipe and quarter pipe, semi-circula ...
,
beams,
railway track
A railway track (British English and UIC terminology) or railroad track (American English), also known as permanent way or simply track, is the structure on a railway or railroad consisting of the rails, fasteners, railroad ties (sleepers, ...
). This depends on the legislation; in some European countries, a full trailer can be as long as a semi-trailer. However, since a rigid truck is longer than a semi-tractor, this increases the overall length of the combination, making it less maneuverable.
For heavy haulage or for increased manoeuvrability, some semi-trailers are fitted with rear-wheel steering, controlled electro-hydraulically.
The wheels on all or some of the rear axles may be turned through different angles to enable tighter cornering, or through the same angle (so-called 'crab' steering) to move the rear of the trailer laterally.
Couplings
The two types of couplings are
fifth-wheel coupling
The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin, a vertical steel pin protruding from the bottom of the front of the semi-tr ...
and automatic. In some applications, no separable coupling is fitted, and the trailer is bolted to the tractor unit, using a bearing, and rocker feet as are used under a fifth wheel skid plate.
Fifth-wheel coupling
The towing vehicle has a wide coupling plate known as a
fifth-wheel coupling
The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin, a vertical steel pin protruding from the bottom of the front of the semi-tr ...
bolted onto its chassis, on which the semi-trailer rests and pivots. As the tractor reverses under the trailer, a kingpin under the front of the trailer slides into a slot in the skid plate, and the jaws of the fifth wheel close onto it. The driver has to raise the trailer legs manually and couple the
airbrake lines and electrical cables. Some low-set trailers such as lowboys/low-loaders and car transporters have electrically powered landing gear due to the necessarily low clearance prohibiting conventional landing gear.
Automatic couplings
Many years ago, automatic couplings predominated, but have not been used now for around 50 years. Automatic couplings were generally used for payloads of or less, e.g. on the
Scammell Mechanical Horse
The concept of the Mechanical Horse tractor unit with an easily detached articulated trailer was conceived in the early 1930s by Napier & Son. It has one front wheel in the midline. The London and North Eastern Railway had approached Napier fo ...
. The Scammell coupler was initially very popular and fitted to many other makes of trucks.
No coupling plate is used on the tractor; a turntable is permanently fixed to the underside of the trailer. This locks to the chassis of the tractor. When the tractor reverses under the trailer, its legs rise, and the brake and electrical connections are made automatically. Almost the entire coupling and uncoupling procedure is operated by the driver from inside the cab, except that he or she has to descend to release (or apply) the trailer parking brake.
Types
Different types of semi-trailers are designed to haul different cargoes.
Common widths are , and .
Generally speaking, most North American type trailers use two axles with dual-tire hubs totaling 8 wheels, while most European type trailers use three axles with single-tire hubs totaling 6 wheels, with one of the axles being able to be lifted for lighter loads and saving on tire, brake, and axle wear. Nearly all sufficiently tall modern trailers are equipped with a rear underride guard to prevent cars from passing beyond the rear edge of the trailer, and most also have side underride guards for the same reason. There are also other smaller differences with regards to kingpin depth, lighting, door locks, et cetera, though most purpose-built tractor trucks can carry most types of trailer regardless of which continent it was built on and the differences therein.
*Box or van trailers are the most common type. They are quite simply a metal box on wheels with some doors on the back, though some offer additional access doors on the sides. Standard lengths in North America are , , , , , , , and .
[ Due to maximum length regulations and the need to maximize cargo within said regulations, almost all European semi-trailers are in length.
* Bus-bodied trailers are hitched to a tractor unit to form a trailer bus, a simple alternative to building a rigid bus.
*]Car carrier trailer
A car carrier trailer, also known as a car-carrying trailer, car hauler, or auto transport trailer, is a type of trailer or semi-trailer designed to efficiently transport passenger vehicles via truck.
Modern car carrier trailers can be open or e ...
s carry multiple cars, usually new cars from the manufacturer. In the US and elsewhere, car carriers often carry used vehicles as well. Similar variants can carry forklift trucks, light commercial vehicles, and agricultural tractors. Single-deck versions are used for larger vehicles.
*Conestoga trailers are a special form of a flatbed trailer with a flexible retractable roof and siding used to carry large pieces of equipment that can only be lifted by an overhead crane, but which also need protection from the weather during transit.
* Curtain siders or tautliners are similar to box trailers except the sides are movable curtains made of reinforced fabric coated with a waterproof coating. To put it another way, it is basically a flatbed trailer with additional aerodynamic and weather protection as well as greater load security. They generally have a restraining system of straps and buckles every foot (30 cm) or so to keep the curtain tight and adverse to the elements. Also, some have removable gates mounted into the trailer, to help reinforce the load and prevent bulges. The purpose of a curtain sider is to combine the security and weather resistance of a box trailer with the ease of loading of a flatbed. Curtain siders are one of the most common trailer types in Europe.
*Drop-deck trailers (or step-frame trailer) have a floor that drops down a level once clear of the tractor unit; the most common types of drop-deck trailers are flatbeds and curtain siders.
*Double deckers or deckers have either a fixed, hinged, or moveable second floor to enable them to carry more palletized goods. In general, a double-decker can carry 40 pallets, as opposed to 26 for a standard trailer. Double-deck trailers are generally a step-frame construction with the majority being either box or curtain siders, with box trailers having either a fixed or movable (floating) deck, and curtain sides having either a fixed or hinged second deck; this hinged second deck generally swings into a position down the length of the trailer and can be divided into two or three sections to allow greater load flexibility. In Australia and New Zealand, they are known as mezzanine trailers or mezz-decks for short.
*Dry bulk ("British" powder tankers) trailers resemble big tankers but are used for cement, sand, barite
Baryte, barite or barytes ( or ) is a mineral consisting of barium sulfate ( Ba S O4). Baryte is generally white or colorless, and is the main source of the element barium. The ''baryte group'' consists of baryte, celestine (strontium sulfate), ...
, flour, and other dry powder materials.
*Dump trailers ("British" Tippers) are trailers in which one end can be raised to allow the cargo (often building materials or Agricultural produce) to slide out the other end. Commonly, they are hinged at the rear and raised at the front, but side-unloading dump trailers also are used.
*Flatbeds, or flat decks, consist of just a load floor and removable side rails and a bulkhead in front to protect the tractor in the event of a load shift. They can haul almost anything that can be stacked on and strapped down.
*Hopper bottoms are usually used to haul grain, but can be used to haul other materials.
*Inloaders are used to transport glass panes on stillages. They feature an open bottom to maximize loading height and the entire trailer can be lifted and lowered during loading, to allow safe loading of fragile glass panels.
*Intermodal trailers are similar in frame design to box trailers, but without any sort of integral cargo-carrying ability as they are designed to carry a variety of standard Intermodal container
An intermodal container, often called a shipping container, is a large standardized shipping container, designed and built for intermodal freight transport, meaning these containers can be used across different Mode of transport, modes of trans ...
s
*Live bottom trailer
A live bottom trailer is a semi-trailer used for hauling loose material such as asphalt, grain, potatoes, sand and gravel. A live bottom trailer is the alternative to a dump truck or an end dump trailer. The typical live bottom trailer has a con ...
s have a conveyor belt on the bottom of the trailer tub that pushes the load material out of the back of the trailer. The tub does not have to be raised to deposit the materials.
* Livestock trailers are used to haul livestock such as cattle, horses, pigs, sheep, etc. Commonly, they have two levels (or three for hogs) to maximize capacity.
*Lowboy
A lowboy is an American collectors term for one type of dressing table, vanity, or duchess (Australian English).Lowboy is a "collectors term for a dressing table made in 18th century America often with a matching highboy ". It is a small table ...
("British/Australian" low-loader) trailers are a type of flatbed in which the load floor is as close to the ground as possible, most commonly used to haul heavy equipment, cranes, bulldozers, etc.
*Refrigerator trailer
A refrigerator truck or chiller lorry (also called a Reefer), is a van or truck designed to carry perishable freight at low temperatures. Most long-distance refrigerated transport by truck is done in articulated trucks pulling refrigerated semi ...
s are box trailers with a heating/cooling unit (''reefer'') attached and insulated walls, used for hauling produce, frozen foods, meat, flowers, etc. Not quite as common but they are also produced in tautliner models with thicker curtains to sustain temperature.
*Refrigerator tank trailer
Container chassis, also called intermodal chassis or skeletal trailer, is a type of semi-trailer designed to securely carry an intermodal container. Chassis are used by truckers to deliver containers between ports, railyards, container depots, a ...
s are well insulated or refrigerated to haul bulk liquid foods, such as liquid sugar, water, wine, milk or juices.
*Semi-trailers with sidelifter
A sidelifter is a specialised vehicle or semi-trailer used to hoist and transport ISO standard intermodal containers over longer distances.
Overview
The sidelifter loads and unloads containers via a pair of hydraulic powered cranes mounted at ea ...
s have a hydraulic crane
A hydraulic jigger is a hydraulically-powered mechanical winch.
From the mid-19th century, hydraulic power network, hydraulic power became available throughout the increasingly modern dockyards and warehouses. This was generated centrally and dist ...
mounted at each end of the chassis allowing for the loading and unloading of shipping containers without the need of a forklift or other container-handling equipment. Also known as a Sideloader.
* Side bay trailers have a series of roll-up or panel doors down each side. Each door opens into individual compartments. These trailers are most commonly used in the beverage distribution industry.
*Tank chassis
Container chassis, also called intermodal chassis or skeletal trailer, is a type of semi-trailer designed to securely carry an intermodal container. Chassis are used by truckers to deliver containers between ports, railyards, container depots, an ...
or tank trailer
A semi-trailer is a trailer without a front axle. In the United States, the term is also used to refer to the combination of a truck and a semi-trailer; a tractor-trailer.
A large proportion of a semi-trailer's weight is supported by a tracto ...
s are used for hauling liquids such as gasoline
Gasoline (; ) or petrol (; ) (see ) is a transparent, petroleum-derived flammable liquid that is used primarily as a fuel in most spark-ignited internal combustion engines (also known as petrol engines). It consists mostly of organic co ...
and alcohol
Alcohol most commonly refers to:
* Alcohol (chemistry), an organic compound in which a hydroxyl group is bound to a carbon atom
* Alcohol (drug), an intoxicant found in alcoholic drinks
Alcohol may also refer to:
Chemicals
* Ethanol, one of sev ...
, or various types of gases. They are similar in principle to intermodal trailers but with a very different frame intended to be attached to a liquid or gas tank, hence the name. Some are designed with a lowered centre of gravity to ensure greater stability. Generally bottom loaded with the ability to recover any waste vapor for safety reasons.
* A "frac" tank trailer has a single and fixed axle, and is typically used during hydraulic fracturing
Fracking (also known as hydraulic fracturing, hydrofracturing, or hydrofracking) is a well stimulation technique involving the fracturing of bedrock formations by a pressurized liquid. The process involves the high-pressure injection of "frack ...
at oil well
An oil well is a drillhole boring in Earth that is designed to bring petroleum oil hydrocarbons to the surface. Usually some natural gas is released as associated petroleum gas along with the oil. A well that is designed to produce only gas may ...
s or for petrochemical industries. It is shaped like a wedge, and when it is unhitched, its bottom side lies flat on the ground.
* "Wing" trailers are mostly found in Japan and are something of a hybrid between a curtain sider and a box trailer, with rigid, motorized Gull-wing door
In the automotive industry, a gull-wing door, also known as a falcon-wing door or an up-door, is a car door that is hinged at the roof rather than the side, as pioneered by Mercedes-Benz 300 SL, first as a race car in 1952 ( W194), and then a ...
s in place of the fabric curtains. Also found as part of a rigid box truck.
Tank trailer
A tank trailer is a semi-trailer specifically designed to carry liquid
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, a ...
s, fluid
In physics, a fluid is a liquid, gas, or other material that continuously deforms (''flows'') under an applied shear stress, or external force. They have zero shear modulus, or, in simpler terms, are substances which cannot resist any shear ...
s and gas
Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma).
A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or ...
es.Tank trailer
/ref>
Gallery
File:2008-08-02 UPS long trailer 1.jpg, Box trailer (US)
File:KühneNagelAuflieger.jpg, Curtain sider trailer (EU)
File:WieltonMuldenkipper.jpg, Semi dump trailer (EU)
File:Caminhaocegonha.jpg, Auto transporter (Brazil)
File:SinoTruk HOWO Iran.jpg, Flatbed trailer (Iran)
File:Live bottom pic 1.jpg, Live bottom trailer (US)
File:Glas-Innenlader für Flachglas.jpg, Glass inloader trailer (Germany)
File:Globe Trailers Lowboy with Volvo A300.jpg, Lowboy
A lowboy is an American collectors term for one type of dressing table, vanity, or duchess (Australian English).Lowboy is a "collectors term for a dressing table made in 18th century America often with a matching highboy ". It is a small table ...
(US)
File:Sainsburys lorry refrigerated trailer.jpg, Refrigerated trailer
A refrigerator truck or chiller lorry (also called a Reefer), is a van or truck designed to carry perishable freight at low temperatures. Most long-distance refrigerated transport by truck is done in articulated trucks pulling refrigerated semi ...
(UK)
File:Sidelifter in forest.jpg, Sidelifter
A sidelifter is a specialised vehicle or semi-trailer used to hoist and transport ISO standard intermodal containers over longer distances.
Overview
The sidelifter loads and unloads containers via a pair of hydraulic powered cranes mounted at ea ...
(New Zealand)
File:Tank truckタンクローリー9274341.jpg, Tank trailer (Japan)
File:Gullwing Trailer.jpg, Gullwing trailer
File:STAA double pup.jpeg, STAA double pup 28.5 foot trailers
File:Loves Freightliner tanker truck, southern Oklahoma.jpg, Tank trailer
See also
*Air brake (road vehicle)
An air brake or, more formally, a compressed-air-brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to apply the pressure to the brake pad or brake shoe needed to stop the vehicle. Air bra ...
* Articulated lorries
*Articulated vehicle
An articulated vehicle is a vehicle which has a permanent or semi-permanent pivot joint
In animal anatomy, a pivot joint (trochoid joint, rotary joint or lateral ginglymus) is a type of synovial joint whose movement axis is parallel to the lo ...
*Brake
A brake is a mechanical device that inhibits motion by absorbing energy from a moving system. It is used for slowing or stopping a moving vehicle, wheel, axle, or to prevent its motion, most often accomplished by means of friction.
Background ...
*Cargo
Cargo consists of bulk goods conveyed by water, air, or land. In economics, freight is cargo that is transported at a freight rate for commercial gain. ''Cargo'' was originally a shipload but now covers all types of freight, including trans ...
*Fifth-wheel coupling
The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin, a vertical steel pin protruding from the bottom of the front of the semi-tr ...
*Fruehauf Corporation
Fruehauf Trailer Corporation, previously Fruehauf Trailer Company (1918–1963) and Fruehauf Corporation (1963–1989), was an American company engaged in the manufacture and sale of truck trailers, and other machinery and equipment, with headquar ...
*Gladhand connector
A gladhand connector or gladhand coupler is an interlocking hose coupling fitted to hoses supplying pressurized air from a tractor unit to air brakes on a semi-trailer, or from a locomotive to railway air brakes on railroad cars. Gladhand conn ...
*Globe Trailers
Globe Trailers is a privately held corporation headquartered in Bradenton, Florida, midway between Tampa and Naples. It is a semi-trailer manufacturer.
History
This heavy equipment-manufacturing company was founded in 1982 and was bought by ...
* Trailer jack
*Jackknifing
Jackknifing is the folding of an articulated vehicle so that it resembles the acute angle of a folding pocket knife. If a vehicle towing a trailer skids, the trailer can push the towing vehicle from behind until it spins the vehicle around and ...
* Live bottom trailer
A live bottom trailer is a semi-trailer used for hauling loose material such as asphalt, grain, potatoes, sand and gravel. A live bottom trailer is the alternative to a dump truck or an end dump trailer. The typical live bottom trailer has a con ...
*Long combination vehicle
A road train, land train or long combination vehicle (LCV) is a trucking vehicle used to move road freight more efficiently than semi-trailer trucks. It consists of two or more trailers or semi-trailers hauled by a prime mover.
History
Early ...
*Refrigerated container
A refrigerated container or reefer is an intermodal container (shipping container) used in intermodal freight transport that is capable of refrigeration for the transportation of temperature-sensitive, perishable cargo such as fruits, vegetabl ...
*Refrigerator truck
A refrigerator truck or chiller lorry (also called a Reefer), is a van or truck designed to carry perishable freight at low temperatures. Most long-distance refrigerated transport by truck is done in articulated trucks pulling refrigerated sem ...
*Roll trailer
A roll trailer is a trailer platform that requires towing by a powered vehicle. It is commonly used for the transport of heavy static goods and materials in the maritime shipping industry. Roll trailers are similar to shipping flat racks contai ...
* Self unloading trailer
*Semi-trailer truck
A semi-trailer truck, also known as a semitruck, (or semi, eighteen-wheeler, big rig, tractor-trailer or, by synecdoche, a semitrailer) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer ...
*Shunt truck
A terminal tractor, known in the United States as a shunt truck, spotter truck, spotting tractor, yard truck, yard shifter, yard dog, yard goat, yard horse, yard jockey, hostler, or mule, is a kind of semi-tractor intended to move semi-trailers ...
* Side stake
A stanchion () is a sturdy upright fixture that provides support for some other object. It can be a permanent fixture.
Types
In architecture stanchions are the upright iron bars in windows that pass through the eyes of the saddle bars or horizo ...
*Swap body
A swap body, swop body, exchangeable container or interchangeable unit, is one of the types of standard freight containers for road and rail transport.
Based on and very similar to the more widespread shipping containers (ISO containers), swap b ...
* Tank chassis
Container chassis, also called intermodal chassis or skeletal trailer, is a type of semi-trailer designed to securely carry an intermodal container. Chassis are used by truckers to deliver containers between ports, railyards, container depots, an ...
*Teardrop trailer (truck) A teardrop trailer is an aerodynamically shaped semi-trailer with a curved-roof that differs in shape from the traditional rectangularly shaped trailer. The trailer is meant to be paired with a compatibly designed tractor unit leading to greater f ...
* Trailer
*Trailer skirt
Trailer may refer to: a
Transportation
* Trailer (vehicle), an unpowered vehicle pulled by a powered vehicle
** Bicycle trailer, a wheeled frame for hitching to a bicycle to tow cargo or passengers
** Full-trailer
** Semi-trailer
**Horse trail ...
*Trailer tail
Trailer may refer to: a
Transportation
* Trailer (vehicle), an unpowered vehicle pulled by a powered vehicle
** Bicycle trailer, a wheeled frame for hitching to a bicycle to tow cargo or passengers
** Full-trailer
** Semi-trailer
**Horse traile ...
*Vehicle category
A vehicle category classifies a land vehicle or trailer for regulatory purposes.
UNECE categories
United Nations Economic Commission for Europe Information from Consolidated Resolution on the Construction of Vehicles (R.E.3), Revision 6.
Some ...
References
External links
*
* {{curlie, Business/Transportation_and_Logistics/Trucking/Trailers/, Semi trailers' manufacturers and sellers
ISO Standards
Specific aspects for light and heavy commercial vehicles, busses and trailers
Semitrailer dimensions
Articulated vehicles
Trailers