That would be a tractor and trailer that has a total of 18 wheels, 10 on the tractor and 8 on the trailer.
You would measure a tractor trailer in grams.
I would have to say no. I have a tractor that is insured the only thing that is insured is just that the tractor (fire theft etc). Although You can get your trailer insured just as you can an ATV horse trailer car truck if you had a policy for it. your tractor insurance will not help with the trailer.
An 18 wheeler consists of a tractor (meaning something that pulls) and a trailer (meaning something that follows.) A semi tractor-trailer rig has a trailer that sits on top of the frame of the tractor on a coupling device called a "fifth wheel." The tractor has ten wheels with two on the front axle and four on each drive axle in the rear. The trailer has two axles with 4 wheels each. The tractor and trailer together are informally called a rig. Is that what you were after?
That depends on the length of the power unit and the weight of the trailer. With a Kenworth W900L with a 265" wheelbase and a 53' stepdeck trailer, I had an overall length of 77 feet. With a Volvo VNL730 and a 48' flatbed or stepdeck trailer, I was right at about 67 or 68 feet. Heavy haul combinations can be significantly longer, but 65 to 78 feet would be about the norm for an over-the-road regional or line haul tractor pulling a single trailer.
Yes, a strong enough tornado could lift a tractor trailer. It would probably take a a strong EF2 or EF3 to do so.
A Whale Tail is a sleeper part of a tractor trailer. This would be the area the driver sleeps. You can buy them from any tractor trailer sales company or you can also try Ebay.
Trailers come in various sizes. Chosing which one would depend on the power capacity of the tractor
Try the tractor with a different trailer, the pig tail is most likely not connecting properly.
This site looks promising http://www.nexttruckonline.com/ they sell trucks, tractor trailers and accessories/maintenance items that you would need for your tractor trailer.
A variety of farming stores would be a good place to start. Furthermore, the internet also contains many websites where one could get tractor trailer insurance.
You go to a truck driving school and learn how to drive a truck. If you "know" how to drive a truck, just imagine you're driving a 10 speed, but you skip over what would be 6th gear in a 10 speed.