Semi-trailer
Semi-trailer (also semi-trailer or short trailer) are followers who outsource some of their weight between the axles of a tractor unit with which they are connected via a fifth wheel plate and the kingpin.
Applications
Trailer trucks are used in particular in the transport of goods. Standard semi-trailers with German approval inside have a length of 13.62 meters and a width of 2.48 meters. The maximum outside dimensions are thus 13.68 m × 2.55 m. They thus offer less loading length as articulated trains, the load space length can exceed 15 meters. In North America ( outer) measure up to 2.60 meters ( 8.5 feet ) × 16.15 meters ( 53 feet ) are possible. The advantages of a tractor-trailer versus a Gliederzug are ( not limited to two vehicles divided ) cargo area and the ease of driving and maneuvering, which you should not forget that the cornering is much more difficult than with a articulated in the through. Even during tight maneuvering driveways with the articulated is more advantageous verglichem with the tractor, since the kink point is at about articulated in the center of the vehicle. In addition, the cost of a standard tractor-trailer are usually lower than that of a comparable articulated train. However, there are also special semi-trailer, about Inloader and low bed trailer ( for higher and / also special transports ), whose cost may be much higher than the average price. Due to lower own weight also, the payload of a tractor-trailer is usually above that of the articulated train.
There are several semi-trailer assemblies, so
- Container chassis
- Plateau ( Flatbed )
- Box body
- Semitrailer
- Tautliners
- Sliding floor structure
- Tanker
- Muldenkippauflieger
- Mega trailer
- Edscha construction
- Kühlgutauflieger
Partial semi-trailer with two or three axles are called tandem and accordingly Tridemanhänger, though this term is actually meant for trailers with a central axle suspension and hitch.
Semi-trailers are also used in unaccompanied combined transport. These cranable trailer with standard lifting points are needed, which can be loaded with the aid of portal cranes or Reach Stackers on recess wagons. The underride protection that prevents rear-end collisions that vehicles come under the trailer is folded away in trailers for combined transport.
There are or were also semi-trailers for the transport of persons, Tractor Omnibus see.