Hi Derek and Brad. Derek, I was thinking the same thing but wasn't sure because there is not post below the 2nd level post. I suppose that a post might be further down the tie and not under the strut and 2nd post. No pegs holes suggest gravity is doing the work. That first ground post couldn't be to far away. Are these pictures too little do determine the type of structure or truss possibly?

Anyone else with a different view?

P.S. This old wood was re-used in a mock arch brace, that's braces don't arc. This is just remnant. Good chopping block though.