What is the minimum size screw for attaching gypsum board to steel studs

What is the minimum size screw for attaching gypsum board to steel studs

• A. #4
• B. #6
• C. #8
• D. #10

Answer: (B)

When attaching gypsum board to steel studs, you must use a screw that is sized to actually bite into metal. The smallest screw in the list is usually too small to reliably thread into steel and can strip the stud or pull out as the wall is installed and later loads occur. The next size up provides enough thread engagement in steel and enough shear resistance to hold the gypsum board securely for typical wall construction, without the unnecessary cost and potential driving issues of the larger sizes. Use a self-tapping drywall screw designed for metal studs, with a length appropriate to go through the drywall and into the steel stud.

When attaching gypsum board to steel studs, you must use a screw that is sized to actually bite into metal. The smallest screw in the list is usually too small to reliably thread into steel and can strip the stud or pull out as the wall is installed and later loads occur. The next size up provides enough thread engagement in steel and enough shear resistance to hold the gypsum board securely for typical wall construction, without the unnecessary cost and potential driving issues of the larger sizes. Use a self-tapping drywall screw designed for metal studs, with a length appropriate to go through the drywall and into the steel stud.