If you just make sure that your subgrade (stone, sand, whatever) is properly compacted and level, it has no problem supporting anything. My concrete guy suggested I add a couple inches to the floor in case I wanna pull the tractor in the shop. 7000 lb Farmall 560...

Type V XPS has a compressive strength of 100 psi. I'll probably go with Type VII, at 60 psi which is plenty strong. Tractor with concrete would only be about 30 psi or less...

In a lifetime, the average driver will honk 15,250 times. My wife figures I'm due to die any day now...