a ton is 2000 pounds so divide 45000/2000 so 22.5 tons
The weight limit of a single axle trailer depends on several factors. The frame, axle type, tire rating, and the springs all have to be factored in.Smaller trailers could be rated at only a few hundred pounds, while heavier built units can haul full sized cars.
Gross 52,000 lbs
The most considerable restriction to pay attention to on pulling your U-haul trailer, is that you have a vehicle that is large enough and powerful enough to haul a trailer. Make sure the axle and transmission can pull the added weight.
ABOUT 23,000 LBS ABOUT 23,000 LBS
It can vary according to the configuration of the trailer axles. A straightforward tanndem, with no spread, is permitted 34.000 lbs. on the trailer axles, which would allow the combination to gross out at 66,000 lbs. A 10 ft. spread axle, on the other hand, is allowed to weigh 40,000 on the trailer axles, which would permit the combination to gross 72,000 lbs.
The definitive answer is...it depends. Very few trailers are made with axels of 2000lb (or less) capacity. Most are 2500 to 5000 llbs (per axle). So if you have a dual axle trailer with two 3500 lb axles you can haul 7000 lbs MINUS what the trailer weighs. I have a single axle 6X12 with a single 3500 lb axle. The trailer weighs approx 500 lbs, so I would feel relatively safe hauling a 3000 lb load.
No upgrade needed unless you're using it to haul hazmat.
Well, that depends on what it's pulling. The federal law allows a max weight of 80,000 lbs., including for double trailers. Some states will allow a truck pulling doubles to gross 92,000 within that state. They can haul as much weight legally as a tandem axle tractor-trailer can, so long as they remain within legal axle weights.
No.
25,000 - 40,000 lbs. or more, depending on specifics. When you say "tractor-trailer", you're citing an all-inclusive category which would include everything from a single axle tractor pulling a 28' single axle trailer up to heavy haul units of over 20 axles... I've personally run combinations which have weighed in excess of 250,000 lbs. empty.
The weight of an International Prostar can vary depending on the configuration and model year. However, the approximate weight of a standard International Prostar tractor without a trailer is around 17,000 to 20,000 pounds.