Definition of a semitrailer, JUPITER  semi-trailer

Semi-trailer is placing the axle behind the vehicle gravity center, and equipped with coupling device which can deliver the horizontal or vertical force to the tractor trailer. Compared with the "single-type" truck, the semi-trailer also can improve the overall economic efficiency of road transport, the transport efficiency can be increased 30-50%, 30-40% cost reduction, decrease fuel consumption 20-30%. More importantly, semi-trailer can promote the logistics organization. Our factory can produce skeleton semi-trailer, flatbed semi-trailer, fuel tanker semi-trailer, concrete mixer semi-trailer, drop-side semi-trailer, curtain semi-trailer, gooseneck semi-trailer, lowbed semi-trailer, and tipper semi-trailer etc.

The Jupiter semi-trailer is a trailer without a front axle. A large proportion of its weight is supported either by a road tractor or by a detachable front axle assembly called a dolly. the semi-trailer is equipped with legs that can be lowered to support it when it is unhooked from the tractor. When coupled together, the tractor and trailer combination is often referred to as a semi, 18-wheeler, big-rig, articulated lorry, or truck and trailer.

The purpose of a semi-trailer is to carry freight. There are several types of semi-trailers including dry freight vans, refrigerated vans (reefers), flatbeds (standard, step-deck, lowboy, double drop, etc.) and tank trailers. Trailer sizes vary, but the most common sizes today are 53 or 48 in length and 102" or 96" in width.

Semi trailers are also referred to as truck trailers and are typically listed under the Heading: Trailers-Truck in most phone directory yellow pages.

Weight and Size Limits in the United States
Although some states and localities vary, a loaded truck (tractor & trailer combination) in the U.S. is typically limited to the following size and weight restriction:
    Maximum Width: 86" (102")
    Maximum Height: 136"
    Maximum Overall Length: 80
    Maximum Total Weight: 80, 000 lbs (including weight of equipment & load)
Shipments that exceed these limits may require special permits and other regulations may be required