Using 90mm pvc storm water pipe, elbows and T fittings, I constructed ends like this :
After the glue had set well (overnight) the ends were stood up at each end of the feijoas ( we have two - two are needed for cross pollination) and the horizontal pieces were inserted. These I have only screwed, in case I decide to move a frame in the future. It now looks like this :
I set the width at 3m as storm water pipe comes in 6m lengths. Height is 2.7m- plenty high enough to be trying to pick fruit. This type of pipe (pvc) is really easy to handle - you can make female ends easily using a hot air gun so there is minimal waste. I have tried to make elbows, as well, but find that not so easy. I am not sure how well it will function in terms of sag on the horizontal pieces. Time will tell on that and I can always reiforce it on the inside with a length of timber.
Whilst placing the fruitfly netting, I found this Blue tongue lizard had taken up residence in it, when it had been lying around nearby, prior to being used:
