You must set the posts on top of concrete with a post base to protect from rot.
Concrete piers for shed base.
The shed is then attached to the wood posts usually with steel connecting plates or post brackets.
If your shed has 3 runners the middle runner can just be supported with the blocking at equal intervals usually about every 4.
Increase to 12 piers with 6x6 posts.
Unlike setting a shed on blocks which are also built in piers concrete piers go fairly deep into the ground and are a permanent foundation.
Then i will use the blocking described above spaced evenly between the anchors about every 4 or so.
Your concrete piers must be a set depth to go below the frost line in your area.
When in doubt always make it stronger.
Concrete offers the best support for vehicles.
Once the piers have cured beams can be set in place on the piers or pier and post and leveled with shims.
A lumber frame sits on top of these piers.
A concrete pier foundation features a series of concrete piers sunk below the frost line and supporting treated wood posts above the ground.
Shed dimensions determine the number of piers you need.
As mentioned above concrete is the best option for a garage.
The number of piers needed to properly support your shed is based on the overall size of the shed you plan to build.
Years of driving a vehicle in and out can cause a building on gravel to start to shift.
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Concrete piers are built by digging holes inserting tubes called sonotubes and pouring them full of concrete.
Usually on the shed floors i build i will have a minimum of 2 concrete foundation piers up to 4.
An 8 x12 shed would use 6 piers 3 per long side.
Before the concrete hardens in the piers set pier or post ties and align in place.
Concrete piers for sheds may be necessary if the shed site has considerable slope.
If you re only installing a shed concrete piers at each corner combined with a gravel foundation may be satisfactory.