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  2. Utility Trailer Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Utility_Trailer...

    www.utilitytrailer.com. Utility Trailer Manufacturing Company is an American semi-trailer truck dry van, flatbed, and refrigerated van trailer manufacturing company, with its headquarters in the City of Industry, Los Angeles County, California, and sales office in Alpharetta, Georgia and a Parts Distribution Center in Batavia, Ohio.

  3. Semi-trailer truck - Wikipedia

    en.wikipedia.org/wiki/Semi-trailer_truck

    A cab over semi-tractor. Tractor with an end-dump trailer. A FAW semi-trailer truck in China. A semi-trailer truck[1] (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.

  4. Trucking industry in the United States - Wikipedia

    en.wikipedia.org/wiki/Trucking_industry_in_the...

    A common property-carrying commercial vehicle in the United States is the tractor-trailer, also known as an "18-wheeler" or "semi".. The trucking industry serves the American economy by transporting large quantities of raw materials, works in process, and finished goods over land—typically from manufacturing plants to retail distribution centers.

  5. Fifth-wheel coupling - Wikipedia

    en.wikipedia.org/wiki/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 2-or- -inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel ...

  6. Trailer-on-flatcar - Wikipedia

    en.wikipedia.org/wiki/Trailer-on-flatcar

    Trailer on flatcar, also known as TOFC or piggyback, is the practice of carrying semi-trailers on railroad flatcars. TOFC allows for shippers to move truckloads long distances more cheaply than can be done by having each trailer towed by a truck, since one train can carry more than 100 trailers at once. [1] The trailers will be moved by truck ...

  7. Semi-trailer - Wikipedia

    en.wikipedia.org/wiki/Semi-trailer

    Semi-trailer. A tractor unit pulling a semi-trailer. A truck pulling a semitrailer using a trailer dolly. 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 (also known simply as a "semi-trailer", "tractor trailer", or "semi" in the United States). [1]

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