We do blueberries with poles and a galvanized steel wire. The pole tops are 9 to 10 feet at the top, and the wire - I don't remember the gauge but it's about .090" .. I can verify that if needed. The poles are about 40 foot apart. The netting is a 1/2" opening and when we were in it deep, we covered 3 1/2 acres!

It took 4 to 5 people 7 days to get it all up and tied together and secured to the wire. Then we'd pray that there wouldn't be a Nor'Easter or a hurricane.