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How to make a tripod
I usually would let round about 10 cm unused cordage at the other side of the first knot to make it easier and I would pull the whole thing a bit tighter with more wrappings. But as you see it works well like this too.
If you use cordage made of a natural fibre you can attach a strong wire hook in the long end for the pot, one side of the hook closed, the side for the pot open of course.
(Plastic could melt if you make a fault with the fire and you could loose the content of the pot.)
That isn't the most bushcraft way to do it, but it surely was the most common.
A lot of people used a cooking chaine instead of it, which is heavier but works without any trouble. The chaine has a hook in both ends or a ring in the upper end where you pull the hook and the chaine through.