I use netting to cover my pens but my pens are smaller than yours. Mine are 60'x200'. I do have some wooden T-posts I made to hold up the netting because it will sag. My fences are 5' tall which is my height but I still have to duck some where it sags. About in the middle of the picture I have a very tall T-post that you can see in the picture.i have posts for the fencing but how big are the sheets of netting? my run is 175x200’. will snow fall through it or pull it down? do i need posts in the middle?