What size screw should used to attach steel sheathing to a metal structure?

What size screw should used to attach steel sheathing to a metal structure?

• A. self tapping #8
• B. self tapping #2
• C. self tapping #5
• D. self tapping #7

Answer: (A)

Choosing the right fastener size matters because you need enough holding power to resist wind and shear without weakening the steel. Self-tapping screws cut threads into the metal, so you want a size that provides solid grip and withdrawal resistance while still fitting through the sheathing and into the framing. A gauge-8 self-tapping screw is commonly recommended for steel sheathing on a metal frame because it offers the needed clamping strength and is easy to drive. Smaller gauges like the others listed would be too weak and more prone to loosening or pull-out under load. Make sure the screw length penetrates through the sheathing and adequately into the framing, and use a corrosion-resistant coating appropriate for the environment.

Choosing the right fastener size matters because you need enough holding power to resist wind and shear without weakening the steel. Self-tapping screws cut threads into the metal, so you want a size that provides solid grip and withdrawal resistance while still fitting through the sheathing and into the framing. A gauge-8 self-tapping screw is commonly recommended for steel sheathing on a metal frame because it offers the needed clamping strength and is easy to drive. Smaller gauges like the others listed would be too weak and more prone to loosening or pull-out under load. Make sure the screw length penetrates through the sheathing and adequately into the framing, and use a corrosion-resistant coating appropriate for the environment.