Chilli and peppers how tall and root ball

I have read that you can make internal suspended gutters for a tunnel and grow strawberrys, chilli's and peppers. In relation to the chilli's and peppers how tall do they grow and what size is the root ball as I don't know how wide or deep to make the gutters and how far to hang them down from the crop bars as I have never grown anything like this before. The only info I have is planting time and spacing, also is there any other suitable plants that can be grown in these hanging gutters.

Sorry not sure if this is a greenhouse question

Russ.

 

Pepper plants grow to about 3 ft in height. As for their root size, the wife grew them in 1 ltr pots and they did well. Aphids seem to love them though so I'd watch out for that. Also they need lots and lots of sunshine, otherwise the peppers you get are small and bitter.