posted 3 years ago
Hi Victor,
I'm not an experienced fence builder, so this is just an idea with no proof behind it, but what about attaching a short section of semi-circular round post to the square post at the height where the brace wire will go?
Start with a round post with a diameter equal to the width of the square post, then cut it short to just the length you need to support the brace wire, then cut it in half to the long way to make a semicircle. Then attach the flat side of the semicircle to the square post with a large bolt and nut. Then you can use staples on the round section as normal, and the flat faces of the square post too, since most of the tension will be on the round part.
I think since the round section won't need to be very tall, you'll still have room to attach the 1x6 boards above and below it.