With normal soil conditions, 4" (100mm) concrete over 4" (100mm) clean well-compacted hard blinded with 2" (50mm) well-compacted sand or ash should be sufficient. The perimeter should be thickened to a minimum of 10" (250mm) by 10" (250mm), below ground level. To increase the strength of the base, steel mesh (A142 – 6mm) can be […]