Corner anchors

The beauty of the steel beam foundation system is that it saves the cost of pouring a concrete foundation which can cost up to $12/sq ft of slab.

Sometimes building departments will require the shed corners be held down in high wind areas.
This is a photo of the above ground portion of the MR88 anchor. The below ground portion is a threaded rod driven 3' into the ground.

A bracket is attached to a strong portion of the shed frame.
The top of the rod is then held to the bracket with a hex capscrew.