Which screw size is specified for 5/8 inch wood sheathing on a steel framed roof?

Which screw size is specified for 5/8 inch wood sheathing on a steel framed roof?

• A. No. 12 self-tapping
• B. No. 10 self-tapping
• C. No. 8 self-tapping
• D. No. 6 self-tapping

Answer: (C)

When choosing fasteners for wood sheathing on a steel frame, the goal is to get enough bite and holding power without splitting the panel or requiring excessive driving torque. For 5/8 inch wood, a self-tapping screw with a moderate diameter provides sufficient thread engagement in the wood to resist pull-out while staying small enough to avoid cracking or splitting the panel. Larger diameters don’t add meaningful holding power for this panel thickness and can introduce more driving resistance and risk of damage; smaller diameters may not grip well enough. So the moderate-diameter self-tapping screw is the best fit for 5/8 inch wood sheathing on steel framing.

When choosing fasteners for wood sheathing on a steel frame, the goal is to get enough bite and holding power without splitting the panel or requiring excessive driving torque. For 5/8 inch wood, a self-tapping screw with a moderate diameter provides sufficient thread engagement in the wood to resist pull-out while staying small enough to avoid cracking or splitting the panel. Larger diameters don’t add meaningful holding power for this panel thickness and can introduce more driving resistance and risk of damage; smaller diameters may not grip well enough. So the moderate-diameter self-tapping screw is the best fit for 5/8 inch wood sheathing on steel framing.