Post spacing should not exceed 16 feet. It does not matter the type of wire are the post type. Post spacing should not exceed 16 feet. And 12' is better.
A welded pipe H with a diagonal is far superior to any wooden brace.
A diagonal kicker should be installed on any turn greater than 15 degrees.
Spacing on braces is only limited by how well you build them and how far you can stretch the wire. Up to about half a mile.
Fall Fence Forum October 18th and 19th, Worthington, IN.
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Bit late but here's a few pointers.
Post spacing at around 4m is usually plenty for most fencing. Sometimes it's still better to go back to 3-3.5m. If you go to greater distances you need to increase the size of the post to at least 4" if your usually using 3-4" posts.
You don't need strainers in the middle of a straight run, only at ends and turns.
You do need thick strainers' though 7-8"+ and deep in the ground 1.2m +/or footed. Angle struts are fine but you want long struts and big strut blocks as fence posts won't hold.
You don't want to go round much of a turn, 10° ish without using a breast block and over 20-30° you need to start strutting
You really need to tie termination knots and not hard staple to attach your netting and wire or your putting too much force on the edge of the strainer if hard stapled.
My advice to start would be use big sized posts. Big strainers, long thick struts and big strut blocks.
You can use a plain 2.5mm HT plain wire and use pegs or posts on turns and corners to mark out the line. This will allow you to move pegs until you get the line in the right place. Then go about knocking strainers posts and strut up.