The biggest one is in China and can lift 4,000 tons I understand.

You have to be careful as it would probably only be able to lift that very close to the crane.

As the booms extends in reach or height the lifting capacity drops say 230 tons at 170 metres height. If the reach is bigger load reduced.

The biggest lift by a crane is about 20,000 tons but that was a shipyard crane not seen a photo of that.

Why am I interested in Cranes. Purely because I worked in Palmers and they lifted stuff. Out on sites over the years the increase in capacity over the years massive changes.

However anything engineering interests me be it in wood, iron, steel, plastic or composite etc.

To see what the experts think about very early works like Egypt and Rome or earlier is interesting.

Electric stuff now leaves me way behind. Could do household and car electrics. Up to a point but once into the computer side of car stuff just gone.

These day cars can have over 20 control units built in. A BMW replacement headlight unit being installed by a dealer has to connect with the factory in Germany before it will work.

On U tube a Rolls Royce damage by flooding was being repaired. The amount of “ control units” in the car Wow.

Allan C.