Copper sheet gauge range used in the sheet-metal shop is?

• A. 16 ounces to 44 ounces
• B. 10 ounces to 48 ounces
• C. 8 ounces to 24 ounces
• D. 12 ounces to 60 ounces

Answer: (B)

Copper sheet gauges are given as ounces per square foot, not a numbered steel gauge. In typical sheet-metal shop practice, copper sheets range from about 10 oz up to about 48 oz. This span covers thin, flexible sheets used for flashing, gutters, and decorative work, through to moderately thick sheets that can still be formed and joined without excessive effort. Thinner than 10 oz tends to be too delicate for many jobs, while thicker than about 48 oz becomes hard to form and much more costly, with fewer practical applications. So, 10 to 48 ounces best matches everyday shop needs.