Type II hood materials shall be constructed of _____.

Type II hood materials shall be constructed of _____.

• A. Stainless steel not less than No. 24 gauge
• B. Copper sheets weighing not less than 24 ounces per square foot
• C. Galvanized steel not less than 22 gauge
• D. Stainless steel not less than No. 24 gauge and copper sheets weighing not less than 24 ounces per square foot apply

Answer: (D)

Type II hoods must be made from corrosion‑resistant metal with a defined minimum thickness. The code allows either stainless steel or copper as acceptable materials, and it sets specific thickness standards for each: stainless steel at least No. 24 gauge, or copper sheets at least 24 ounces per square foot. The phrasing that both apply means you can construct the hood from either material as long as you meet the corresponding thickness requirement. This combination ensures durability and resistance to the humid, variable conditions Type II hoods encounter. The other options limit you to a single material (or use a material not preferred for this application), which doesn’t satisfy the code’s acceptable-material approach.

Type II hoods must be made from corrosion‑resistant metal with a defined minimum thickness. The code allows either stainless steel or copper as acceptable materials, and it sets specific thickness standards for each: stainless steel at least No. 24 gauge, or copper sheets at least 24 ounces per square foot. The phrasing that both apply means you can construct the hood from either material as long as you meet the corresponding thickness requirement. This combination ensures durability and resistance to the humid, variable conditions Type II hoods encounter. The other options limit you to a single material (or use a material not preferred for this application), which doesn’t satisfy the code’s acceptable-material approach.