Hello everyone, it is good to be here. I have a few questions. I am going to be doing a cinder block build. I think I have most of the design down and what i am going to be using . My question was the sheet metals. I am going to probably go about 4 high but have not decided for sure yet. Anyways whatever position the grate goes in, I want to be ably to put apiece of sheet metal 1 block down. The reason is so I can have close heat on the days I want to frill tons of burgers, hot dogs, etc. My question is what gauge metal is good for burning coals? I priced 16ga....will 18 ga work? Also I am putting 2 sheets at the top for a cover...what ga would be best for that purpose?