Tons of work
Near my work is this company that rents cranes and other large lifting equipment.
These are the contra-weights of one of their cranes on quite a simple trailer.
Yes the T's in the image represent 1000 kg, so that's over 20T in weight on this trailer.
I've also seen trailers, a bit lager (10 axis with wheels) carrying at least 50T.
- Canon EOS 450D