5/8 inch wood sheathing installed on a steel framed roof requires what type and size of screws?

5/8 inch wood sheathing installed on a steel framed roof requires what type and size of screws?

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

Answer: (B)

When fastening five-eighths-inch wood sheathing to a steel frame, you need fasteners that cut into metal without requiring a pilot hole and that provide enough strength to resist pull-out. Self-tapping screws fit this purpose because they cut their own threads into the steel as you drive them. For this wood thickness, eight-gauge self-tapping screws strike the right balance: they’re strong enough to hold the panel securely without splitting the edge, yet not so large that they’re hard to drive or excessive for the panel. A smaller screw wouldn’t offer adequate withdrawal resistance, while larger ones would be overkill and harder to install.

When fastening five-eighths-inch wood sheathing to a steel frame, you need fasteners that cut into metal without requiring a pilot hole and that provide enough strength to resist pull-out. Self-tapping screws fit this purpose because they cut their own threads into the steel as you drive them. For this wood thickness, eight-gauge self-tapping screws strike the right balance: they’re strong enough to hold the panel securely without splitting the edge, yet not so large that they’re hard to drive or excessive for the panel. A smaller screw wouldn’t offer adequate withdrawal resistance, while larger ones would be overkill and harder to install.