They're typically allowed, in the US, a gross vehicle weight of 54.000 lbs. How much that equates to in freight tonnage depends on the tare weight of the vehicle. A tandem dump truck can typically haul 15 tons. A tandem roll off with a 30 yard container is typically only good for 9 - 11 tons.
You need to be more specific about the configuration. Is a single axle straight truck, a tandem axle straight truck, a tandem axle straight truck with additional lift axles, a tractor trailer...?
What's the configuration? For a single axle straight truck, the allowed interstate gross weight is 33,000 lbs. For a tandem axle straight truck, it's 54,000 lbs. For a tractor-trailer, it's 80,000 lbs.
Well, the question is really too vague to be answered. You said gross weight, implying you want a loaded weight. Volvo manufactures and sells many different models of trucks worldwide. We have no way of knowing if you're referring to a Volvo truck in the United States, South Africa, Australia, the United Kingdom, etc. The allowable gross weights will vary between jurisdictions. Also, you did not say what configuration of truck - again, for all we know, you could be referring to a single axle straight/rigid truck, a tandem axle, a tandem axle with additional lift axles, tandem axle twin steer, single axle articulated truck, tandem axle articulated truck, etc. Typically, however, a sleeper cab truck and daycab truck are allowed the same gross weights.
40,680 lbs.
Depends on what exactly it is.. twin steer, tandem axle truck with pusher axles, etc. For a tandem with two pusher axles, 18 - 21 tons, dependent on location, local laws, wheelbase, road type, etc.
Which model? Which truck class (International makes trucks in Classes 5 through 8). Single axle? Tandem axle? There really isn't an "average" weight, because International's straight trucks are typically manufactured as cab and chassis, then any additional beds are added as aftermarket items.
Legally, a tandem axle is typically good for 15 tons, give or take.
Need to know the specific model and configuration (e.g., single axle, tandem, tri-axle, quad axle, centipede) in order to answer this.
The average tandem axle truck can carry about 12 cubic yards of soil. Generally, a tandem axle truck has three axles.
Depends where you are, as weight allowances are much different in various countries. For a tandem axle straight truck in the US, the max weight would be 54,000 lbs. In a dump truck, that typically equates to 13 - 15 US short tons of payload (dependent on the tare weight of the vehicle, of course). If you're referring to a tractor pulling a trailer, a standard five axle unit (steer axle, tandem drive axles, tandem or spread trailer axles) would be allowed a max gross weight of 80,000 lbs. under the federal bridge law, which, depending on the empty weight of the vehicle, could typically permit you anywhere from 20 to 25 US short tons of payload.
A dump truck with two (tandem) rear pulling axles supported by a third fixed axle located in the middle of the truck which only reaches the ground after a certain amount of load weight.
A tandem truck usually refers to the amount of axles on the trailer or tractor. A single drive axle on a tractor would be referred to as a single, or the same for one axle on the trailer. I have seen it referred to the amount of tires on the end of an axle. When there are two tires on the end of the axle, that would be referred to as a dual, not a tandem.