The Simpson Strong-Drive SDWF Floor-to-Floor Screw Kit delivers a complete, ready-to-install solution for wind-uplift restraint connections in wood-frame construction. Engineered to span the full floor system and tie upper and lower walls together from the top, this kit establishes a continuous uplift load path that helps structures resist the lateral and vertical forces associated with high-wind conditions. Every component needed for a proper, consistent connection is included, making this kit a straightforward choice for contractors and builders working on compliant uplift restraint assemblies.

Key Features

• Floor-to-floor spanning design - the screw connects upper and lower wall plates by passing through the floor assembly from the top, simplifying the uplift load path without requiring access from below
• Variable thread design - engineered to pull through the floor system and draw wall framing members together for a tight, load-transferring connection
• Type-17 point - cuts into wood fibers cleanly for fast, reliable engagement without pre-drilling, saving time on the job site
• Hex washer head with 5/16 in. hex drive - provides high torque transfer during installation and works with standard impact drivers, reducing fastener cam-out
• E-coat electrocoating - provides corrosion resistance suited for protected interior framing applications
• TUW take-up washer included - galvanized 10-gauge steel washers ensure proper screw seating depth and consistent load transfer at each connection point
• Screw depth guide included - takes the guesswork out of installation by confirming correct SDWF engagement with the TUW, supporting code-compliant results on every fastener
• Replacement hex driver bit included - keeps the job moving without needing a separate supply run when the original bit wears
• SD Connector screws included - provides the supplemental fasteners needed to fully complete the connection assembly in a single kit

Why This Product

• One kit, complete installation - the Simpson Strong-Drive SDWF kit bundles the floor-to-floor screws, take-up washers, connector screws, a driver bit, and a depth guide together, so installers have every required component on hand before work begins
• Engineered for top-down installation - because the SDWF is installed from above the floor system, contractors can establish wind-uplift restraint connections without working from below or removing subfloor material, reducing labor and disruption
• Built-in installation accuracy - the included screw depth guide actively confirms proper engagement between the screw and take-up washer, reducing the risk of under-driven or non-compliant connections in critical uplift load paths
• Trusted Simpson engineering - the Strong-Drive SDWF system is purpose-built for floor-to-floor uplift restraint, giving builders and inspectors confidence that the fastener geometry, coating, and included hardware are matched to the application from the ground up

Specifications

• Model Number: SDWF2730-TUW
• Shank Diameter (in.): 0.270
• Length (in.): 30
• Head Diameter (in.): 0.730
• Head Type: Hex Washer Head
• Drive Type: 5/16 in. Hex
• Thread Type: Variable Thread Design
• Thread Length (in.): 5
• Point Type: Type-17 Point
• Coating/Material: E-coat Electrocoating
• Pack Size: 25-count kit

What's Included

• (25) Strong-Drive SDWF Floor-to-Floor screws
• (25) TUW take-up washers (galvanized 10 ga. steel)
• (100) Strong-Drive SD Connector screws (#9)
• 5/16 in. hex driver bit (replacement driver bit - BITHEXR516-R1)
• Screw depth guide to ensure proper SDWF engagement with TUW

Frequently Asked Questions

What is the purpose of the SDWF Floor-to-Floor screw?

The Strong-Drive SDWF is designed to connect upper and lower walls together by spanning the floor system. It is installed from the top, creating a continuous uplift load path through the structure to resist wind-uplift forces.

What tools are needed to install the SDWF screw?

The screw uses a 5/16 in. hex drive, and a replacement hex driver bit (BITHEXR516-R1) is included in the kit. A screw depth guide is also included to ensure proper engagement between the SDWF screw and the TUW take-up washer.

What is the take-up washer (TUW) made of, and why is it included?

The TUW take-up washer is made of galvanized 10-gauge steel. It is included to work in conjunction with the SDWF screw, ensuring proper seating depth and consistent load transfer at the connection point. The screw depth guide in the kit helps confirm correct SDWF engagement with the TUW.

Does this kit contain everything needed for a complete installation?

Yes. The 25-count kit includes all required installation hardware: 25 SDWF screws, 25 TUW take-up washers, 100 Strong-Drive SD Connector screws (#9), a 5/16 in. hex driver bit, and a screw depth guide - eliminating the need to source components separately.

Note: Product dimensions may differ from picture. Please see item description for specifications.