Woland wrote:

The outcome of all this ruminating on personal and other people's
observations is that putting the joists (even if pressure treated)
directly on the soil ( levelled, graveleld, etc it's still soil) is
pretty bad. What is always recommended is something along

- level the ground
-put damp proof barrier (thick black polyethylene sheed) on ground (or
below if you lay cement)
-put slabs on barrier
-now you can put joists on, although I would further recommend you lay
joists on bricks to make sure joists are not directly touching the
slabs and getting any stagnating water for long time

Now your shed floor would be seriously safe...

Concrete fence posts laid on edge work a treat. Give a good airlow under
the shed, doddle to lay & level, cheap.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk