What are the rules for barbecue ovens in barbecue shops

The barbecue oven used in the barbecue shop is generally about 20 cm wide, 16 cm high, and more than 1.2 meters long. The whole should be welded. The steel plate should be thicker, so it can resist high temperature deformation and have a long service life. Otherwise, the thin iron sheet will be deformed and burned twice, which is a waste of time and difficult to bake