Sheds and Storage
Preparing a Post and Pier Base
Will cope with the steepest slopes, and involves building a timber deck on which to place the shed.
Dig a 300mm x 300mm hole to a depth of 600mm.
Compact 100mm gravel for drainage [allows water to flow away quickly]. Pour concrete and finish at ground level.
WONKEE DONKEE recommends using a Metpost Concrete-In post support, 100mm, or similar, which you set into the concrete, continually checking it is upright. Once the concrete has set, the post can be driven in.