ANSWER
It varies, however, the maximum is 80.000 lbs. It may be even more if that operator has a special permit.
18 pounds dry weight. The average load capacity for washing machines is typically 18 pounds dry weight.
18 wheeler has the higher gross weight
About 8000
on average you need to fuel an 18 wheeler once a day
22 to 25 tons, typically.
Eighteen wheeler accidents are so dangerous due to the size of the trucks and the weight the carry in cargo. It takes an eighteen wheeler about 40% longer to stop than it does an average sized car.
To give an example, you add the empty weight of the combination plus the weight of the load. You subtract that sum (in lbs.) from 80,000, which is the maximum allowable gross weight (again, in lbs.). If your result is in the negative, you're overloaded.
It doesn't matter what the trailer type is.. for an 18 wheeler engaged in interstate commerce, and without requiring an overweight permit, the allowed gross weight is 80,000 lbs.
Normally tells you on the Ministry Plate
Without requiring an overweight permit, some can.. some are light enough. Most usually will not be.
Question How long does it take to stop a 18 wheeler with gross weight 80000 pounds at 65 mph on a good day and dry roads?
That depends on the weight, and whether you're simply over weight on a set of axles, or over your gross weight.