If you live in an exceptionally wet area or have a major termite problem you might want to use pressure treated wood for the entire floor including the skids the floor joists and the plywood sheeting.
How to frame a shed floor.
How to build a shed floor click here if you want to build your shed on a concrete slab.
The piers will allow you to string support beams beneath the floor of the shed.
After building the frame for the shed floor we recommend you to place them on top of several 4 4 skids.
I used pieces of wood that were left over from cutting the studs for leveling.
In the example design the piers are spaced 6 feet 1 8 m apart in one direction and 4 feet 1 2 m apart in the other for a total grid area of 12 x 8 feet.
Make sure the shed floor is completely level.
Level the ground if necessary and install deck piers along a grid to support the shed.
Regardless of whether you are building it yourself or having a pre built shed delivered you will need to build a solid shed floor where your shed will ultimately stand.
Typical shed floor anchors and supports in 3d.
Add dirt under the frame where needed.
Check out the following 3dmodel of a typical shed floor with one anchor in each corner and blocking in between the anchors and also all along the middle 4x4 support skids.
You may use flat stones or similar to get it level too.
As you can see in the image you need to align the skids before placing the frame on top of them as to distribute the weight efficiently.