I can't address your codes;but I have an 8 X 12 that just sits on cinder blocks . It hasn't moved in 20 years . It has built in shelves holding about 600 lb of stuff which may help. When Harvey hit ,we got 40" of rain in a couple days and the only problem was the end of a 100' pine laid on it ( didn't move it ). I figure if it blows away I will have bigger problems than a garden shed.
blacksmith37
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