Your walls will need to be open and steel post outs welded to the steel studs. If they are light metal framing, they won’t be heavy duty enough. They will want to twist. They need to be the heavier gauge structural studs. The stone will need to be drilled out to accept the steel post outs. That can be pretty tricky. If your walls aren’t very very flat, it will show. Applying drywall around steel post outs is also very very tricky, and tends to end up not flat. You have a chicken and egg issue where each element fights the others.
All of that is solved with highly skilled workers and a nice fat budget to pay them..
You are not going to be able to place combustible materials within the prohibited zone. Quarts has a resin component and will scorch and burn. Wood will just burn. Stainless, sure. Natural stone? Most white stones are far too porous to place directly above a cooking zone. It will interfere with the air flow of your hood, and you’ll get a lot of things deposited on the shelf that should have gone in the hood filter. Your white stone wont stay white long.
Your design really does not need to span side to side across the range.
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Hood advice on red oak flooring finishes
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