Read a small article in Farmshow, vol 34, no 2, on taking the wire from old corncribs, and filling rounds of the wire with rocks to make extra sturdy corner posts cattle can't budge. This man does 5 ft in diameter and 8 ft tall. On some, he adds plow lathes on the side to hang heavy gates on.
I will suppress my every urge. But not this shameless plug: