The Simpson Strong-Drive SDWF Floor-to-Floor Screw with Take-Up Washer Kit is purpose-built to simplify wind-uplift restraint connections while delivering superior, long-lasting performance within the continuous uplift load path of a structure. The unique design of the SDWF enables it to attach upper and lower walls together from the top, spanning the floor system for a straightforward plate-to-plate connection. The innovative Take-Up Washer (TUW) - installed between the screw head and the sole plate of the upper floor - provides built-in shrinkage compensation that keeps the connection tight even after initial wood shrinkage and settlement occur, playing a key role in the long-term integrity of the installation. The E-coat electrocoating finish is recommended for dry, low-corrosion environments.

Key Features

• Faster plate-to-plate installation than other floor-to-floor connection methods - simply drive the screw and install the take-up washer to complete the connection, reducing labor time on the job site
• Shrinkage compensation via the Take-Up Washer (TUW) - automatically maintains a tight connection after initial wood shrinkage and settlement, protecting long-term structural performance without re-work
• Installs entirely from inside the structure - eliminates the need for exterior work on upper stories, improving job site safety and efficiency
• Flexible installation sequencing - fastening can be done before or after exterior sheathing is applied, so crews are not locked into a single workflow
• One screw length accommodates multiple floor depths - reduces the number of different screw sizes needed on site, simplifying procurement and inventory management
• Variable Thread Design with Type-17 Point - engineered thread geometry and self-starting point work together for consistent, reliable engagement through the floor system
• 5/16 in. Hex drive type - compatible with standard hex driver tooling for fast, secure driving without cam-out
• Complete kit with all required installation hardware - includes SDWF screws, TUW take-up washers, Strong-Drive SD Connector screws, a hex driver bit, and a screw depth guide, so crews have everything needed to make the connection without sourcing additional components

Why This Product

• A complete, ready-to-install wind-uplift connection solution - every component needed to make the floor-to-floor uplift connection is included in a single kit, eliminating the guesswork of sourcing compatible hardware separately and keeping the job moving
• Built-in long-term performance through shrinkage compensation - the Take-Up Washer actively accounts for wood movement after installation, meaning the uplift connection does not loosen over time as the structure settles, a critical advantage for the life of the build
• Interior-only installation reduces risk and complexity - because the SDWF is driven entirely from inside the structure without requiring exterior access on upper stories, it improves worker safety and allows work to proceed regardless of exterior conditions
• Simplified screw selection across varying floor depths - with one screw length serving multiple floor system configurations, contractors can standardize on fewer SKUs and reduce the chance of using an incorrect fastener on site

Specifications

• Model Number: SDWF2716-TUW
• Shank Diameter (in.): 0.270
• Length (in.): 16
• Head Type: Hex Washer Head
• Head Diameter (in.): 0.730
• Drive Type: 5/16 in. Hex
• Thread Type: Variable Thread Design
• Thread Length (in.): 5
• Point Type: Type-17 Point
• Coating / Finish: E-coat Electrocoating
• Quantity: 25

Approved Applications

• Fastening Floor-to-Floor

What's Included

This kit includes all required installation hardware:

• (25) Strong-Drive SDWF Floor-to-Floor screws
• (25) TUW take-up washers
• (100) Strong-Drive SD Connector screws (#9)
• 5/16 in. hex driver bit (replacement driver bit - BITHEXR516-134)
• Screw depth guide to ensure proper SDWF engagement with TUW