Re: Backyard shed/structure
Another way to skin this cat is with cross-drive anchors. On those you drive a series of pins with a jackhammer. I'd consider these if I was building a bridge in the woods (and having to hump the material in), filling a field with solar panels (and having a conservation commission averse to filling that field with lumps of concrete), or trying to minimize the embodied carbon of a project (which requires running actual numbers).
I suspect if you run the financial numbers on any of these anchors vs. four sonotubes and bags of quikrete, you'll be buying those yellow cardboard tubes and debating whether it's easier to make batches in a wheelbarrow or rent a mixer.
Regardless of what you end up sticking into the ground, be sure to call Dig Safe.
Trod Harland, Pickle Expediter
Not everything that is faced can be changed, but nothing can be changed until it is faced. — James Baldwin
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