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Message: <blockquote data-quote="purplemarina" data-source="post: 967377" data-attributes="member: 327664">if you want to keep the base to minimal thickness, i would drive some thick rebar/1m studding or metal fence spikes into the ground under the slab to prevent tilt. use wire mesh in the slab to prevent cracking you can wire this to the rebar for extra strength,do this before you pour the concrete.i have my 1.2m play dish fixed to a 3ft concrete paving slab i drilled 4 holes and drove 4 16mm 1m studs into the ground for stability i also fixed some guide wires this was ment to be temporary that was 5 years ago hasnt budged an inch!!</blockquote>