How am I supposed to be able to drive a 43000 pound load?

I am being contacted by brokers wanting me to drive a 43000 pound load. My sleeper truck weighs 56000 pounds and the maximum allowable is 80000 pounds so this is impossible, right? And then there is the trailer weight.

Am I thinking right? It wouldnt even work if I had a day cab, would it?

Sorry for the beginner question.

 

Thanks for responding. Are you saying that
1) a sleeper truck + 53 foot trailer normally weighs around 30000 pounds altogether
or
2) in order to pull 43000 pounds of cargo legally, the tractor + trailer would need to weigh 30000 pounds (which may or may not be realistic)
?

 

Wikipedia says:
The page "Tar weight" does not exist.

And:
The gross vehicle weight rating (GVWR), or gross vehicle mass (GVM), is the maximum operating weight/mass of a vehicle as specified by the manufacturer[6] including the vehicle's chassis, body, engine, engine fluids, fuel, accessories, driver, passengers and cargo but excluding that of any trailers.

IMHO, best practice is to encourage even the "stupid" questions, to make sure nobody takes a haul without being certain about these things. Normally I try to google them first but now I have spent several hours try to find an explanation to a very basic concept. I think there may be a general problem with people not daring to ask the "stupid" questions.