Good grab! Looks to be about 11 gage steel, should provide years of service. You might consider getting some 1/2 or 1/3 "splits" firebrick and line at least the bottom of the firebox. Here is wishing you good cooking!
Weber 26.75 OTG w/CI grates & SJ/WSM Mini
Home built 24"x72" reverse flow stick burner trailer with 18"x44" grill w/CI grates and upright SS gas oven/smoker.
Home built 48" fire pit with a 30"x30" Santa Maria style ranch grill.
Home built lump charcoal retort, iGrill & a bunch of other cooking toys.