Yep, between 4 and 6 inch slab. 4m x 4.5m. just holding a paddling pool, so no heavy machinery on this one, and no big single point weight either.
on a sub base which is about 2 foot deep cobbles, so rock solid!
I would presume that those cobbles don't hold much heat overnight. A bit more attention where the slab is 6inches thick, and, you should probably be OK.
@mespilus started
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Yep, between 4 and 6 inch slab. 4m x 4.5m. just holding a paddling pool, so no heavy machinery on this one, and no big single point weight either.
on a sub base which is about 2 foot deep cobbles, so rock solid!