Why do dump trucks have don't use hooks painted on the back?

Answer 1

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.