Five
Front axle 12,000, Front tandem 34,000, Rear tandem 34,000 unless it is a spread axle trailer; then it is 40,000 for the two rear axles combined. Total weight not to exceed 80,000 lbs.
Tandem by definition is two. So tandem axle is two axles. Example would be a tractor trailer having two axles next to each other is a tandem axle.
Need to know what states will be crossed and the total weight of the vehicles.
1. @ 8,000 pounds cab and chassis weight single axle... 2. @ 10,000 pounds cab and chassis weight tandem axle...
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.
60:40
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.
If you have a sliding fifth wheel, you can transfer weight from the drive axles to the steer axle by sliding it forward, or you can transfer weight from the steer axle to the drive axles by sliding it back. If you have sliding tandems on your trailer, you can transfer weight from the drive axles to the trailer axles by sliding the trailer axles forward, or you can transfer weight from the trailer axles to the drive axles by sliding the tandem axles back. If you don't have these options, you have to readjust your load.
It's a trick question - gross weight is the loaded weight. The weight of an empty vehicle would be the tare weight. This would depend on exactly what model International it was, as well as the configuration (single axle, tandem, tri-axle, etc).
A Class 8 truck is a vehicle with a Gross Vehicle Weight Rating of over 33,000 lbs. Single axle trucks with an additional lift axle, tandem axle trucks, tandem axle trucks with additional lift axles, and tractor-trailer dumps are all Class 8 trucks.
Laws vary by jurisdiction. In the US, a trailer with a GVW in excess of 3,000 lbs. to 6,000 lbs. - dependent on state - must have an independent braking system. A tandem axle trailer would require a brake system in all states.