Thank you guys for the replies. (oldestguy) Yes, the tires are made of rubber and yes, I don't mind if there is some rotation or tilt angle of the machine.
The area will just be a place where I can park the heavy equipment. It may also be a place where we can fix and maintain the equipment...
This might be simple to many, but I have some difficulties. I will build an area (which will be backfilled with soil material) which will house the cranes I have. I have a maximum component load of 125 metric tons of 4-wheel cranes. The crane has a wheel with an area of about 1 square meter each...