If you imbed them in concrete, a total of 5" should work, 7" for driveway or walk crossing drive. Slope the 1/4 inch per foot toward the road.
Larry2
---- [log in to unmask] wrote:
>
>
> In a message dated 11/13/2008 9:07:57 A.M. Eastern Standard Time,
> [log in to unmask] writes:
>
> Ralph; I am with John on this one;
> any long stone or big square stone .
> .all it takes is one piece of gravel to find its balanced fulcrum
> underneath and she will snap like a candy bar when stood on (been there done that)
> The substrate or the setting bed is the key;
> Outdoors
> 3" rock dust; (with fines) or rock dust and hydraulic lime wet to the
> consistency of beach sand but
> for heavy traffic areas (working surfaces )
> ; you cannot have big joints; you want tight joints
> This is nice, but my question was how thick the slabs should be? Or are you
> saying it doesn't matter? Which makes no sense to me.
> Ralph
>
>
>
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