Another thing I would like to add.
If you are going to sink pipe up into concrete footings make sure the concrete is above grade.
Also it will last almost forever if you wrap it in underground pipe wrap.
I would much rather use anchor plates on the bottom of the metal and bolt it to the concrete.
Do this by putting your J bolts in the concrete before it sets up.
Make a plywood pattern just exactly like the pattern of the support plate put your bolts and nuts one it and set it in the concrete so it doesn't move around or sink.
Worth
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