Is this the preferred size ¾” – 9 trade size? Should I use Flattened or standard, I hear that flattened is easier for cooking but that standard is more rigid. The meat rack would be 10" x 48" 1 piece or 10" x 24" 2 pieces, I think the 2 pieces would be easier for removal and cleaning And whats the best way to make the grates using angle iron? Is there any other ways to make the grates with expanded steel that is recommended or preferred. I see a lot of builds but can never quite see how the grates are done.