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Conventional style cab tractor A cab-over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck (also known by a wide variety of other terms – see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms There are a ...
The typical 5-axle tractor-trailer combination, also called a "semi" or "18-wheeler", is a Class 8 vehicle. [30] Standard trailers vary in length from 8 ft (2.4 m) containers to 57 ft (17 m) van trailers, with the most common length being the 53 ft (16 m) trailer. [31] Specialized trailers for oversized loads can be considerably longer.
Intermodal containers shipped by rail within North America are primarily 53 feet (16.15 m) long, with trailer-on-flat-car (TOFC) units used as well. The 53-foot length reflects a common maximum length for highway semi-trailers, which varies by state. [12] Major domestic intermodal carriers include: J. B. Hunt; Swift; Schneider National; Hub Group
Early 20th-century weight limits were enacted to protect dirt and gravel roads from damage caused by the solid wheels of heavy trucks. As time passed, truck weight limits focused primarily on gross weight limits (which had no prescribed limits on length). By 1974, bridges received special protection from increasing truck weight limits.
Due to maximum length regulations and the need to maximize cargo within said regulations, almost all European semi-trailers are 13.60 m (44 ft 7 + 7 ⁄ 16 in) in length. Bus-bodied trailers are hitched to a tractor unit to form a trailer bus, a simple alternative to building a rigid bus.
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, [ 1 ] : 2–3 and are thus a key part of the intermodal supply chain .
Trailer tracking is tracking the position of an articulated vehicle’s trailer unit through a tracking device fitted to the trailer. [1] A communication network or satellite network is then used to transfer this positional data to a centralized collection point. Trailer tracking is used to increase productivity by optimizing the use of trailer ...
The length is not ideal for transporting containers, but is better suited for 24 ft / 26 ft swap bodies due to the higher load limit. T4.0 / T4.1 / T4.2 [ edit ] The T4.0l, developed in- house by Hupac AG , now has a loading length of 18,280 mm (59 ft 11 + 5 ⁄ 8 in), which is also common today for one-piece 60 ft container wagons.