Use 2.50" PVC pipes - 1 length cut into 2 = 10’ – 1 length = Rs. 400/-.
Fill with concrete 3:2:1----sand: 3/4" jelly: cement----ratio concrete.
DO NOT PUT RODS ALL THE WAY down inside the pipe, keeping the pipe VERTICAL, NOT EVEN SLATING, it will bend.
Put 1 " long 10 or 8 mm steel rod on top, to tie any net etc.
Net cost works to about Rs. 300 per length of 10’.
We have tried it and it is a success.
Photos can be send if needed. very simple , cheap and best !
Antony Raj
Just keep in vertical in any place. We went up to the top of the sheet and poured the concrete. Same mix 1:2:3. Used a rod to ensure it is filled without air pockets.