When installing a round pen, oval arena or rounded corners, the installation is all about the same.

• The tightest that you want to bend the fencing is a 25' radius or 50' diameter.
  
  
• Set a radius stake. (you will measure your posts all the same distance from the stake. Example: 25' radius would be 25' from the radius stake to the center of the post).
  
  
• Start marking your posts from your gate working your way around to the other gate post.
  
  
• Mark your posts center to center, from each other, 7'11" instead of the standard 8' centers. This will make sure you don't run out of rail when flexing them. You may have to trim the ends of the rails and renotch them, but it is much better then being to short. If you come out with and odd section at the end, mark the last few sections at 7' centers until you use up the odd space. This makes the fence look more uniform without odd, short sections.
  
  
• Drill the holes and clean the loose dirt out.
  
  
• When setting your posts, measure from the radius point out to the center of each post whatever your radius dimension was. (example was 25'). Be sure to point the post toward the radius stake and this will turn the post to match the turn.
  
  
• Cement the post and pack the dirt.
  
  
• Drive the posts down or pull them up to roughly the same height off the ground.
  
  
• Railing is the same as before. Two people help the process a little to bend the rails when sliding them through and into the other posts. Trim the ends and renotch if necessary.
  
  
• After the rails are in, you will be able to see if you need to adjust the height of the posts a little more to smooth the look.