Product Description
The Simpson Strong-Drive SDWF Floor-to-Floor Screw (SDWF2720-TUW) is an engineered fastener solution designed to simplify wind-uplift restraint connections while delivering superior long-term structural performance. At 0.270 in. x 20 in. with a 5/16 in. hex drive and variable thread design, this screw attaches upper and lower walls together from the top, spanning the entire floor system to create a reliable, easy-to-install connection within the continuous uplift load path of the structure. The included innovative Take-Up Washer (TUW) - installed between the screw head and the sole plate of the upper floor - is critical to maintaining a tight, high-performance connection even as lumber shrinks and settles over time. This 25-count kit includes every component required for a complete installation, making it the all-in-one choice for floor-to-floor uplift restraint on residential and light-frame construction projects.
Key Features
- Fast, Simplified Installation: Drive the screw, install the take-up washer, and the plate-to-plate connection is complete - faster than other floor-to-floor connection methods.
- Shrinkage Compensation: The Take-Up Washer (TUW) ensures a tight, secure connection even after initial lumber shrinkage and settlement occur, preserving long-term structural integrity.
- Interior Installation: Installs entirely from inside the structure, eliminating the need for exterior work on upper stories and enhancing job-site safety.
- Flexible Scheduling: Fastening can be performed before or after exterior sheathing is applied, providing added flexibility to fit your construction sequence.
- Single Length, Multiple Applications: One 20 in. screw length accommodates multiple floor depths, reducing the need to stock multiple screw lengths on the job site.
- Variable Thread Design: Engineered thread geometry optimizes pull-through performance and clamping force across the floor assembly.
- Type-17 Point: Self-drilling point for efficient, reliable penetration into wood framing members.
- E-coat Electrocoating: Recommended for dry, low-corrosion environments, providing a consistent, durable protective finish.
- Complete Kit: Includes all required installation hardware - screws, take-up washers, connector screws, driver bit, and screw depth guide - for a fully equipped installation.
Specifications
- Model Number (MPN): SDWF2720-TUW
- Shank Diameter: 0.270 in.
- Length: 20 in.
- Head Type: Hex Washer Head
- Head Diameter: 0.730 in.
- Drive Type: 5/16 in. Hex
- Thread Type: Variable Thread Design
- Thread Length: 5 in.
- Point Type: Type-17 Point
- Coating / Finish: E-coat Electrocoating
- Quantity: 25
- Country of Origin: Taiwan
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
- Screw depth guide to ensure proper SDWF engagement with TUW
Frequently Asked Questions
- What is included in the SDWF2720-TUW kit?
- The 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), a 5/16 in. hex driver bit, and a screw depth guide to ensure proper SDWF engagement with the TUW.
- What is the purpose of the Take-Up Washer (TUW), and where is it installed?
- The Take-Up Washer (TUW) is installed between the screw head and the sole plate of the upper floor. Its role is to compensate for lumber shrinkage and settlement over time, ensuring the floor-to-floor connection remains tight and structurally sound throughout the life of the structure.
- Can this screw be used across different floor depths, or is it limited to a specific floor system thickness?
- One screw length can be used for multiple floor depths, reducing the need to stock many different screw lengths and providing added flexibility across varying floor system configurations.
- Is the E-coat finish suitable for all environments, and what are the key specs of the screw itself?
- The E-coat electrocoating is recommended for dry, low-corrosion environments only - it is not intended for high-moisture or highly corrosive conditions. The screw measures 0.270 in. in shank diameter and 20 in. in length, features a hex washer head with a 0.730 in. head diameter, a 5/16 in. hex drive, a variable thread design with a 5 in. thread length, and a Type-17 point.
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