The bed, not the box. At that point, it becomes very top heavy and unstable, and the driver must be certain to have that truck level when they raise the bed. However, most dump/tipper trucks will allow a little leniency as far as that goes, although I wouldn't dare raise the bed of a centipede (four additional lift axles, and typically a bed of well over 25 feet) unless I was on perfectly stable ground.
The worst of the all are frameless end dump tractor trailers.
Dumps truck bodies aren't raised by some sort of "clip". They're raised by pressurised hydraulic fluid.
A truck with a body which can be raised in order to dump the contents of that body out. "Tipper" is a term common to Commonwealth countries - in other countries, they may be known as dump trucks.
The volume that a dump truck can hold depends on the size of the truck. You could say that there is no 'typical' dump truck. The horsepower, the axle weight, and the size of the box are a few of the features that determine how much the truck can hold and haul.
A straight truck is simply any truck which is not towing a trailer. E.g., box truck, dump truck, etc.
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I own one with a 5 yard dump box on it. I weigh in at 11060lbs empty.
You'd have to give me some idea of what type of dump truck you had in mind. You could be talking about anything from something mounted on a one ton pickup chassis all the way up to an off-road dump truck rated to haul over 400 tons.
The amount of dirt a dump truck can hold depends on the size of the dump truck. The average tri axle dump truck can hold 12 cubic yards of dirt, and a quad axle can hold 14.
A dump truck with two drive axles.
In idle? The configuration of the tractor has nothing to do with determining that. It's the motor which does, and the consumption rate in idle for a motor would be the same for a tandem axle dump truck as it would be for the same motor in a road tractor, box truck, quad axle dump truck, cement mixer, etc.
A dump truck is simply a truck with a dump body - it could be a side dump, belly dump, or end dump. An end dump dumps out of the rear. "End dump" is generally used to refer to tractor-trailer end dumps, while single vehicle end dumps are generally just referred to as "dump trucks".
To give an example.... when you pave something such as a racetrack, you're at a very steep angle which would cause a dump truck to tip over once its bed was raised into the air. In many cases, the bed may not even have to be raised for this to happen. One method to allow dump trucks to dump into a paving machine on such surfaces is to have cranes hook to the beds and chassis of the dump truck in order to prevent them from tipping over. Which is fine, if the truck has a bed which won't be damaged by the hooks. However, many dump trucks do not, and their beds may be susceptible to damage from having a crane hooked to it - especially in the case of dump trucks which have lightweight aluminum dump bodies, rather than steel dump bodies.