I made the standard cooking grate for my pig roaster with Expanded stainless steel flat 3/4 diamond #9 and 1x1 1/4 angle iron. This is the standard grate like many smokers have
The diamonds point the length of the grate. The grate is 2x5 and I have supports, running the width every 10" or less.
My issue is I have added 6 burners to turn it into a grill and when Iheat it over 400 degrees, the grate bows up and down like a wave. There is at most like 9" betweent eh supports and it is still flexing when hot.
All I can think of is to cut the supports out and put in at least 3 length wise. All the pictures I see on the web don't have this many supports and I know some have to use high heat. Is this a common issue? I had supports wider then it flexed then when I added more, it was worse.
Maybe is the way the run of the diamonds length way that means it's how I have to support.
Anyone use their grates with high heat and have this issue. The below link is to the grate type I made.