Must still be careful. The 2 center poles are 10'. The 4 side poles are 6. I'm going to increase the length to 7 foot. I also have a third center pole that can prop up the center for better drainage if needed. Under normal conditions the flame from the fire will be about 24" tall. When the flame and heat content is sufficient it will puff up the ridge.
I was told when Scouting that an Indian will build a small fire to stay warm and a white man will build a large fire and stay cold. Think of the times when you were at a bonfire and had to keep spinning. One side was always hot and the back side was cold.
I copied this basic design from another gentleman is our camping crowd who does canvas tents in the Renn-Faire style. This tarp is a 15x 30 so that means 14.5 x 29.5 finished size. Bummer was that the number of grommets are an even number. It made the first build a bit off center. I'm going to add another grommet to each side to establish a center
My deal is still a work in progress. I found out that it pays to keep the open sides a bit toward the prevailing wind if you want to keeps the sides staked down. Smoke can still accumulate but not bad.
I was able to roll up the sides to help with draft and under the tarp cleared out nicely. I can also raise or lower the sides to promote proper draft much like a chimney flue.
The metal poles may act like lightning rods so I have to be careful. We don't get many, if any, thunderstorms here.
In the second pic, when the flame was at the top of the fire ring best results were felt.
If your fire seems really smokey, then it's not hot enough or the wood hasn't seasoned yet.
