The Simpson Strong-Tie® Strong-Drive® SDWF Floor-to-Floor Screw makes it easy to tie upper and lower walls together across a floor system, creating a strong, reliable connection that helps resist wind uplift and settlement over time. Instead of complicated hardware, this single screw installs quickly from the inside of the building, no exterior scaffolding or ladder work needed.

The Take-Up Washer (TUW™) features a structure that naturally settles over time. The TUW automatically adjusts, keeping the connection tight and secure. This allows for less worry about shrinkage gaps and more confidence in your build’s long-term durability.

With fewer parts to handle, flexible installation options, and the ability to work with engineered wood, the SDWF screw is a simple, code-compliant solution for safer, longer-lasting framing.

Key Features

• Quick Installation – Drive the screw, set the take-up washer, and you’re done.
• Stays Tight Over Time – TUW™ take-up washer automatically adjusts for shrinkage and settlement (up to 3/4" per story).
• Safer, Easier Access – Installs from inside the structure, so no climbing around upper-story exteriors.
• Flexible Install – Works before or after sheathing is applied.
• Fewer Sizes Needed – One screw length works across multiple floor depths, cutting down on inventory.