I have hawks and eagles daily.
Fortunately my dad was able to help with supplies for my run.
He gave me some scraps of coiled tubing.
This tubing is ~1" diameter and very stout. It is used in coiled tubing oil wells. It comes on giant rolls all coiled up.
The pieces I got were curved and roughly 10' wide at their widest.
My dads neighbor is a commercial salmon Seine fisherman and gave me some large pieces of heavy duty netting for the top.
I have used this netting when commercial fishing to hoist over 5,000# of fish at once. Even though mine is used I absolutely cannot pull it apart in the least.
I sunk treated 4x4 posts then fastened the curved tubing for the top. I zip tied the netting to the tubing. Screwed treated 2x4's to the 4x4's at the ground and used fence staples to secure the netting to the treated wood and to my coop.
I did have to tie an extra piece of netting together but a net mending needle and mending twine made short work of it.
Here in AK I don't have raccoons,skunks,or opossums to deal with.
My run is roughly 10'wide and 25' long and 7' tall in the center.
No hawk or eagle is getting my birds.
You'll likely not have these materials on hand for free but maybe will give you some ideas.