What is the smallest sized screw that can be used to attach 1/2 inch gypsum board to load bearing steel studs?

What is the smallest sized screw that can be used to attach 1/2 inch gypsum board to load bearing steel studs?

• A. #8 x 1 inch
• B. #6 x 1-1/2 inch
• C. #6 x 1-1/4 inch
• D. #6 x 1 inch

Answer: (D)

When attaching gypsum board to steel studs, you pick a fastener that can pass through the board and bite into the stud with enough depth to hold securely. For 1/2 inch gypsum board on load-bearing steel studs, the smallest fastener that still provides solid engagement into the stud is a No. 6 screw about 1 inch long. The 1 inch length allows the screw to go through the 1/2 inch board and penetrate into the steel stud enough to develop holding strength, while the No. 6 diameter is the minimum needed to provide adequate shear and withdrawal resistance. Using a larger diameter or a longer screw isn’t necessary for this scenario and would be more than what’s required.

When attaching gypsum board to steel studs, you pick a fastener that can pass through the board and bite into the stud with enough depth to hold securely. For 1/2 inch gypsum board on load-bearing steel studs, the smallest fastener that still provides solid engagement into the stud is a No. 6 screw about 1 inch long. The 1 inch length allows the screw to go through the 1/2 inch board and penetrate into the steel stud enough to develop holding strength, while the No. 6 diameter is the minimum needed to provide adequate shear and withdrawal resistance. Using a larger diameter or a longer screw isn’t necessary for this scenario and would be more than what’s required.