A swap body, exchangeable container or interchangeable unit,[1] 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 bodies normally have the same external dimensions for the bottom corner fittings as ISO shipping containers so that they can be placed on the same kinds of trucks, trailers and railroad cars designed for shipping containers. However, ISO containers inner dimensions (2.33 m wide) are just a few centimetres too short to accommodate European-pool pallets (0.8m ×1.2m or 31.5in ×47.2in) without leaving much empty space. To optimise the carriage of pallets, wide bodies are often scaled to the maximum width allowed for standard road trucks and railroad cars and to a different length without leaving empty space.
On the other hand, swap bodies do not have upper corner fittings, are not stackable and must be lifted by the bottom frame. Thus, they require special handling when transported by rail and are unsuitable for ship-based overseas transportation.[2]
Swap Body or Demountable Body; notice the four legs deployed to support the frame (see text)
Swap bodies take advantage of the large number of trailers used to carry standard ISO containers. The design of swap bodies and roller containers is optimized to minimize empty weight, saving on trucking fuel cost (less dead weight to be transported) and the cost of building reloading terminals[clarification needed].[3]
Due to security concerns,[clarification needed] an increasing number of swap bodies have a hard surface instead of curtains and tarpaulins.
Swap bodies are typically more expensive than equivalent payload ISO containers. This is because the ISO containers used in Europe are typically manufactured in China, whereas swap bodies are made in Europe (central Europe and the UK). This extra cost is offset by the lighter weight of the body and increased cargo capacity, resulting in fuel savings during transport.
Many swap bodies are fitted with four up-folding legs under their frame.[4] These legs make it possible to change, or swap, their body from one carriage to another, or to leave the swap body at a destination, without using extra equipment [4] such as a crane or hoist.
Special swap bodies may have more doors or sliding panels than ordinary hard boxes for trucks, railroad cars, or sea containers. This feature makes unloading and loading faster and easier.
Many swap bodies are fitted with keyhole tracks. These secure a range of extras such as shoring bars and cargo nets to extend its uses in various applications. Recently a second flooring using folding shelves has been used to aid postal companies.
All swap bodies are subject to extensive non-destructive (in most cases) testing, some in-house others not, regulated by certifying authorities.
Basic standardization is set with Euronorms EN 283, EN 284 and EN 452 for construction and design, as well as EN 13044 for marking and identification. The panel responsible for developing standards is CEN/TC 119. The outcome of this panel has not yet provided any contribution to automation, as handling the swap bodies is a traditional haulage business with truck drivers involved.
Swap bodies in Europe are all manufactured to a DIN standard of DIN EN 283. In the United States there are no standard sizes. Demountable Concepts, Inc., however maintains compliance will all applicable cargo securement standards for its swap bodies.
Containerization is a system of intermodal freight transport using intermodal containers. Containerization, also referred as container stuffing or container loading, is the process of unitization of cargoes in exports. Containerization is the predominant form of unitization of export cargoes, as opposed to other systems such as the barge system or palletization. The containers have standardized dimensions. They can be loaded and unloaded, stacked, transported efficiently over long distances, and transferred from one mode of transport to another—container ships, rail transport flatcars, and semi-trailer trucks—without being opened. The handling system is mechanized so that all handling is done with cranes and special forklift trucks. All containers are numbered and tracked using computerized systems.
An intermodal container, often called a shipping container or ISO Container, is a large standardized container designed and built for intermodal freight transport, meaning these containers can be used across different modes of transport – such as from ships to trains to trucks – without unloading and reloading their cargo. Intermodal containers are primarily used to store and transport materials and products efficiently and securely in the global containerized intermodal freight transport system, but smaller numbers are in regional use as well. These containers are known under a number of names. Based on size alone, up to 95% of intermodal containers comply with ISO standards, and can officially be called ISO containers. Many other names are simply: container, cargo or freight container, shipping, sea or ocean container, container van or sea van, sea can or C can, or MILVAN, SEAVAN, or RO/RO. The also used term CONEX (Box) is a technically incorrect carry-over usage of the name of an important predecessor of the international ISO containers, namely the much smaller prior steel CONEX boxes used by the U.S. Army.
Intermodal freight transport involves the transportation of freight in an intermodal container or vehicle, using multiple modes of transportation, without any handling of the freight itself when changing modes. The method reduces cargo handling, and so improves security, reduces damage and loss, and allows freight to be transported faster. Reduced costs over road trucking is the key benefit for inter-continental use. This may be offset by reduced timings for road transport over shorter distances.
The twenty-foot equivalent unit is a general unit of cargo capacity, often used for container ships and container ports. It is based on the volume of a 20-foot-long (6.1 m) intermodal container, a standard-sized metal box which can be easily transferred between different modes of transportation, such as ships, trains, and trucks.
In transportation, freight refers to goods conveyed by land, water or air, while cargo refers specifically to freight when conveyed via water or air. In economics, freight refers to goods transported at a freight rate for commercial gain. The term cargo is also used in case of goods in the cold-chain, because the perishable inventory is always in transit towards a final end-use, even when it is held in cold storage or other similar climate-controlled facilities, including warehouses.
A sidelifter is a specialised vehicle or semi-trailer used to hoist and transport ISO standard intermodal containers over longer distances.
A pallet is a flat transport structure, which supports goods in a stable fashion while being lifted by a forklift, a pallet jack, a front loader, a jacking device, or an erect crane. Many pallets can handle a load of 1,000 kg (2,200 lb). While most pallets are wooden, pallets can also be made of plastic, metal, paper, and recycled materials.
A dump truck, known also as a dumping truck, dump trailer, dumper trailer, dump lorry or dumper lorry or a dumper for short, is used for transporting materials for construction as well as coal. A typical dump truck is equipped with an open-box bed, which is hinged at the rear and equipped with hydraulic rams to lift the front, allowing the material in the bed to be deposited ("dumped") on the ground behind the truck at the site of delivery. In the UK, Australia, South Africa and India the term applies to off-road construction plants only and the road vehicle is known as a tip lorry, tipper lorry, tipper truck, tip truck, tip trailer or tipper trailer or simply a tipper.
Rail freight transport is the use of railroads and trains to transport cargo as opposed to human passengers.
Truckload shipping is the movement of large amounts of homogeneous cargo, generally the amount necessary to fill an entire semi-trailer or intermodal container. A truckload carrier is a trucking company that generally contracts an entire trailer-load to a single customer. This is as opposed to a less-than truckload (LTL) company that generally mixes freight from several customers in each trailer. One advantage Full Truckload (FTL) carriers have over Less than Truckload carriers is that the freight is never handled en route, whereas an LTL shipment will typically be transported on several different trailers. Truckload shipments are typically run on 48' or 53'dry van trailers which will hold 24 or 26 pallets respectively.
Less-than-truckload shipping or less than load (LTL) is the transportation of an amount of freight sized between individual parcels and full truckloads. Parcel carriers handle small packages and freight that can be broken down into units less than approximately 150 pounds (68 kg). Full truckload carriers move entire semi-trailers. Semi-trailers are typically between 26 and 53 feet and require a substantial amount of freight to make such transportation economical. The term LTL can refer to the freight itself, or to the carrier that transports the such freight.
The Palletized Load System (PLS) is a truck-based logistics system that entered service in the United States Army in 1993. It performs long and short distance freight transport, unit resupply, and other missions in the tactical environment to support modernized and highly mobile combat units. It provides rapid movement of combat configured loads of ammunition and all classes of supply, shelters and intermodal containers. It is similar to systems such as the British Demountable Rack Offload and Pickup System (DROPS).
A semi-trailer is a trailer without a front axle. The combination of a semi-trailer and a tractor truck is called a semi-trailer truck.
A flatbed truck is a type of truck the bodywork of which is just an entirely flat, level 'bed' with no sides or roof. This allows for quick and easy loading of goods, and consequently they are used to transport heavy loads that are not delicate or vulnerable to rain, and also for abnormal loads that require more space than is available on a closed body. Flatbed trucks can be either articulated or rigid.
Flat wagons, as classified by the International Union of Railways (UIC), are railway goods wagons that have a flat, usually full-length, deck and little or no superstructure. By contrast, open wagons have high side and end walls and covered goods wagons have a fixed roof and sides. Flat wagons are often designed for the transportation of goods that are not weather-sensitive. Some flat wagons are able to be covered completely by tarpaulins or hoods and are therefore suitable for the transport of weather-sensitive goods. Unlike a "goods wagon with opening roof", the loading area of a flat is entirely open and accessible once the cover is removed.
A shipping container is a container with strength suitable to withstand shipment, storage, and handling. Shipping containers range from large reusable steel boxes used for intermodal shipments to the ubiquitous corrugated boxes. In the context of international shipping trade, "container" or "shipping container" is virtually synonymous with "intermodal freight container", a container designed to be moved from one mode of transport to another without unloading and reloading.
Load securing, also known as cargo securing, is the securing of cargo for transportation. According to the European Commission Transportation Department “it has been estimated that up to 25% of accidents involving trucks can be attributable to inadequate cargo securing”. Cargo that is improperly secured can cause severe accidents and lead to the loss of cargo, lives, and vehicles, or cause environmental hazards.
The EUR-pallet, also known as Euro-pallet or EPAL-pallet, is the standard European pallet as specified by the UIC pallet working group and the UIC 435-2 leaflet. Pallets conforming to the standardization are eligible for the European Pallet Pool (EPP), the system which allows for an exchange as "pallet for pallet".
A roller container is a container type that can be carried by trucks to be pushed to ground level by help of a hook and level arm with the container possibly sliding on steel roller wheels.
A 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, and shipper facilities, and are thus a key part of the intermodal supply chain.
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